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                                                                    EXHIBIT 4.10

                        UNCONDITIONAL GUARANTY AGREEMENT

         THIS UNCONDITIONAL GUARANTY AGREEMENT (this "Guaranty") is executed as
of April 1, 1999, by TIDEL CASH SYSTEMS, INC., a Delaware corporation,
("Guarantor"), for the benefit of CHASE BANK OF TEXAS, N.A. ("Bank").

                                    RECITALS

         1. Pursuant to that certain Credit Agreement (as the same may be
amended, modified, increased, supplemented and/or restated from time to time,
the "Loan Agreement"), dated as of the date hereof and executed by and among
Tidel Engineering, L.P. ("Borrower") Bank and Tidel Technologies, Inc., the Bank
has agreed to make certain loans to Borrower in the principal amount set forth
therein;

         2. The Bank is willing to make certain loans under the Loan Agreement
but only on the condition, among others, that Guarantor shall have executed and
delivered to Bank, for its benefit, this Guaranty; and

         3. Guarantor will derive substantial direct and indirect benefit from
the making of the loans under the Loan Agreement.

         NOW, THEREFORE, as an inducement to Bank to make certain loans to
Borrower, and to extend such additional credit as Bank may from time to time
agree to extend, and for other good and valuable consideration, the receipt and
legal sufficiency of which are hereby acknowledged, Guarantor, jointly and
severally, hereby agrees as follows:

                                   AGREEMENTS

                                    ARTICLE I

                          NATURE AND SCOPE OF GUARANTY

         Section 1.01. Guaranty of Obligations. Guarantor hereby irrevocably and
unconditionally guarantees to Bank and its successors and assigns the due and
punctual payment of the Obligations (hereinafter defined). Guarantor hereby
irrevocably and unconditionally covenants and agrees that it is liable for the
Obligations as primary obligor.

         Section 1.02. Definition of Obligations. As used herein, the term
"Obligations" means:

                  (a) All indebtedness, liabilities, obligations and duties
evidenced by the Notes (as such term is defined in the Loan Agreement), whether
or not Borrower has any recourse liability therefor to Bank and whether or not
the Notes are enforceable against Borrower or any other person liable thereon;

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                  (b) Any and all other indebtedness, liabilities, obligations
and duties of every kind and character of Borrower to Bank arising pursuant to
or related to the Loan Agreement, the Notes, or any loan agreement, security
agreement, collateral document or other document, instrument or contract
executed in connection with the Loan Agreement whether now or hereafter existing
or arising, regardless of whether such present or future indebtedness,
liabilities, obligations or duties be direct or indirect, primary or secondary,
joint, several, or joint and several, fixed or contingent, and regardless of
whether such present or future indebtedness, liabilities, obligations or duties
may, prior to their acquisition by Bank, be or have been payable to, or be or
have been in favor of, some other person or have been acquired by Bank in any
transaction with one other than Borrower including further, without limitation,
the "Obligations" as defined in the Loan Agreement;

                  (c) Any and all renewals, extensions, modifications and
increases of such indebtedness, liabilities, obligations and duties, or any part
thereof, described in items (a) and (b) of this SECTION 1.02; and

                  (d) All costs, expenses and fees, including but not limited to
court costs and attorneys' fees, arising in connection with the collection of
any or all amounts, indebtedness, obligations and liabilities of Borrower to
Bank described in items (a) through (c) of this SECTION 1.02 including costs,
expenses and fees arising in connection with the enforcement of this Guaranty.

         Section 1.03. Obligations Not Reduced by Offset. The Obligations, and
the liabilities and obligations of Guarantor to Bank hereunder, shall not be
reduced, discharged or released because or by reason of any existing or future
offset, claim or defense of Borrower, or any other party, against Bank or
against payment of the Obligations, whether such offset, claim or defense arises
in connection with the Obligations (or the transactions creating the
Obligations) or otherwise. Without limiting the foregoing or the Guarantor's
liability hereunder, to the extent that Bank advances funds or extends credit to
Borrower, and does not receive payments or benefits thereon in the amounts and
at the times required or provided by applicable agreements or laws, Guarantor is
absolutely liable to make such payments to (and confer such benefits on) Bank,
on a timely basis.

         Section 1.04. "Borrower" to Include Successors. The term "Borrower" as
used herein shall include any new or successor entity formed as a result of any
merger or reorganization of Borrower, and all other successors and assigns of
Borrower.

         Section 1.05. Payment by Guarantor. The Guarantor shall have the same
rights as Borrower under the Loan Agreement to cure any Event of Default (as
defined in the Loan Agreement) within the time periods, and otherwise in
accordance with the terms, provided in the Loan Agreement. If all or any part of
the Obligations shall not be punctually paid when due, whether at maturity or
earlier by acceleration or otherwise, Guarantor shall, immediately upon demand
by Bank, and without presentment, protest, notice of protest, notice of
non-payment, notice of intention to accelerate or acceleration or any other
notice whatsoever, pay in lawful money of the United States of America, the
amount due on the Obligations to Bank at Bank's

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principal office in Dallas, Texas. Such demand(s) may be made at any time
coincident with or after the time for payment of all or part of the Obligations,
and may be made from time to time with respect to the same or different items of
Obligations. Such demand shall be deemed made, given and received in accordance
with SECTION 5.02 hereof.

         Section 1.06. No Duty to Pursue Others. It shall not be necessary for
Bank (and Guarantor hereby waives any rights which Guarantor may have to require
Bank), in order to enforce such payment by Guarantor, first to (a) institute
suit or exhaust its remedies against Borrower or others liable on the
Obligations or any other person, (b) enforce Bank's rights against any security
which shall ever have been given to secure the Obligations, (c) enforce Bank's
rights against any other guarantors of the Obligations, (d) join Borrower or any
others liable on the Obligations in any action seeking to enforce this Guaranty,
(e) exhaust any remedies available to Bank against any security which shall ever
have been given to secure the Obligations, or (f) resort to any other means of
obtaining payment of the Obligations. Guarantor hereby waives any other rights
of Guarantor provided by Tex. Bus. Comm. Code Ann. Art. 34. Bank shall not be
required to mitigate damages or take any other action to reduce, collect or
enforce the Obligations.

         Section 1.07. Waiver of Notices, etc. Guarantor hereby waives notice of
(a) any loans or advances made by Bank to Borrower, (b) acceptance of this
Guaranty, (c) any amendment or extension of the Loan Agreement, the Notes or of
any other instrument or document pertaining to all or any part of the
Obligations, (d) the execution and delivery by Borrower and Bank of the Loan
Agreement or of Borrower's execution and delivery of any promissory notes or
other documents in connection therewith, (e) Bank's transfer or disposition of
the Obligations, or any part thereof, (f) protest, proof of non-payment or
default by Borrower, or (g) any other action at any time taken or omitted by
Bank, and, generally, all demands and notices of every kind in connection with
this Guaranty, or any documents or agreements evidencing, securing or relating
to any of the Obligations, except as otherwise specifically provided herein.

         Section 1.08. Nature of Guaranty. This Guaranty is an irrevocable,
absolute, continuing guaranty of payment and performance and not a guaranty of
collection. This Guaranty shall continue to be effective with respect to any
Obligations existing or which arise out of commitments made by Bank prior to any
attempted revocation by Guarantor, and as to all renewals and extensions
thereof, in whole or in part, whenever made. The fact that at any time or from
time to time the Obligations may be increased or reduced shall not release,
discharge or reduce the obligation of Guarantor with respect to indebtedness or
obligations of Borrower to Bank thereafter incurred (or other Obligations
thereafter arising). This Guaranty may be enforced by Bank and any subsequent
holder of the Obligations and shall not be discharged by the assignment or
negotiation of all or part of the Obligations.

         Section 1.09. Payment of Expenses. In the event that Guarantor should
breach or fail to timely perform any provisions of this Guaranty, Guarantor
shall, immediately upon demand by Bank, pay Bank all costs and expenses
(including court costs and reasonable attorneys' fees) incurred by Bank in the
enforcement hereof or the preservation of Bank's rights hereunder. The covenant
contained in this SECTION 1.09 shall survive the payment of the Obligations.

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         Section 1.10. Effect of Bankruptcy. In the event that, pursuant to any
insolvency, bankruptcy, reorganization, receivership or other debtor relief law,
or any judgment, order or decision thereunder, Bank must rescind or restore any
payment, or any part thereof, received by Bank in satisfaction of the
Obligations, any prior release or discharge from the terms of this Guaranty
given to Guarantor by Bank shall be without effect, and this Guaranty shall
remain in full force and effect. It is the intention of Guarantor that
Guarantor's obligations hereunder shall not be discharged except by Guarantor's
performance of such obligations and then only to the extent of such performance.

                                   ARTICLE II

              EVENTS AND CIRCUMSTANCES NOT REDUCING OR DISCHARGING
                             GUARANTOR'S OBLIGATIONS

         Guarantor hereby consents and agrees to each of the following, and
agrees that Guarantor's obligations under this Guaranty shall not be released,
diminished, impaired, reduced or adversely affected by any of the following, and
waives any common law, equitable, statutory or other rights and defenses
(including without limitation rights to notice) which Guarantor might otherwise
have as a result of or in connection with any of the following:

         Section 2.01. Modifications, etc. Any renewal, extension, increase,
modification, alteration or rearrangement of all or any part of the Obligations,
or the Loan Agreement, the Notes or any loan agreement, security agreement,
collateral document or other document, instrument, contract or understanding
between Borrower and Bank, or any other parties, pertaining to the Obligations;

         Section 2.02. Adjustment, etc. Any adjustment, indulgence, forbearance
or compromise that might be granted or given by Bank to Borrower;

         Section 2.03. Condition of Borrower. The insolvency, bankruptcy,
arrangement, adjustment, composition, liquidation, disability, dissolution or
lack of power of Borrower or any other party at any time liable for the payment
of all or part of the Obligations; or any dissolution of Borrower, or any sale,
lease or transfer of any or all of the assets of Borrower, or any changes in the
shareholders of Borrower; or any reorganization of Borrower;

         Section 2.04. Invalidity of Obligations. The invalidity, illegality or
unenforceability of all or any part of the Obligations, the Notes or any
document or agreement executed in connection with the Obligations, for any
reason whatsoever, including without limitation the fact that (a) the
Obligations, or any part thereof, exceeds the amount permitted by law, (b) the
act of creating the Obligations or any part thereof is ultra vires, (c) the
officers or representatives executing the documents creating the Obligations
acted in excess of their authority, (d) the Obligations violate applicable usury
laws, (e) Borrower has valid defenses, claims or offsets (whether at law, in
equity or by agreement) which render the Obligations wholly or partially
uncollectible from Borrower, (f) the creation, performance or repayment of the
Obligations (or the execution, delivery and performance of any document or
instrument representing part of the

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Obligations or executed in connection with the Obligations, or given to secure
the repayment of the Obligations) is illegal, uncollectible or unenforceable, or
(g) the documents or instruments pertaining to the Obligations have been forged
or otherwise are irregular or not genuine or authentic;

         Section 2.05. Release of Obligors. Any full or partial release of the
liability of Borrower on the Obligations or any part thereof, or of any
co-guarantors, or any other person or entity now or hereafter liable, whether
directly or indirectly, jointly, severally, or jointly and severally, to pay,
perform, guarantee or assure the payment of the Obligations or any part thereof,
it being recognized, acknowledged and agreed by Guarantor that Guarantor may be
required to pay the Obligations in full, without assistance or support of any
other party, and Guarantor has not been induced to enter into this Guaranty on
the basis of a contemplation, belief, understanding or agreement that other
parties will be liable to perform the Obligations, or that Bank will look to
other parties to perform the Obligations;

         Section 2.06. Other Security. The taking or accepting of any other
security, collateral or guaranty, or other assurance of payment, for all or any
part of the Obligations;

         Section 2.07. Release of Collateral, etc. Any release, surrender,
exchange, subordination, deterioration, waste, loss or impairment of any
collateral, property or security, at any time existing in connection with, or
assuring or securing payment of, all or any part of the Obligations;

         Section 2.08. Care and Diligence. The failure of Bank or any other
party to exercise diligence or reasonable care in the preservation, protection,
enforcement, sale or other handling or treatment of all or any part of such
collateral, property or security;

         Section 2.09. Status of Liens. The fact that any collateral, security,
security interest or lien contemplated or intended to be given, created or
granted as security for the repayment of the Obligations shall not be properly
perfected or created, or shall prove to be unenforceable or subordinate to any
other security interest or lien, it being recognized and agreed by Guarantor
that Guarantor is not entering into this Guaranty in reliance on, or in
contemplation of the benefits of, the validity, enforceability, collectibility
or value of any collateral for the Obligations;

         Section 2.10. Offset. The Obligations, and the liabilities and
obligations of Guarantor to Bank hereunder, shall not be reduced, discharged or
released because of or by reason of any existing or future right of offset,
claim or defense of Borrower against Bank, or any other party, or against
payment of the Obligations, whether such right of offset, claim or defense
arises in connection with the Obligations (or the transactions creating the
Obligations) or otherwise;

         Section 2.11. Merger. The reorganization, merger or consolidation of
Borrower into or with any other entity;

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         Section 2.12. Preference. Any payment by Borrower to Bank is held to
constitute a preference under bankruptcy laws, or for any reason Bank is
required to refund such payment or pay such amount to Borrower or someone else;
or

         Section 2.13. Other Actions Taken or Omitted. Any other action taken or
omitted to be taken with respect to the Obligations, or security and collateral
therefor, if any, whether or not such action or omission prejudices Guarantor or
increases the likelihood that Guarantor will be required to pay the Obligations
pursuant to the terms hereof; IT IS THE UNAMBIGUOUS AND UNEQUIVOCAL INTENTION OF
GUARANTOR THAT GUARANTOR SHALL BE OBLIGATED TO PAY THE OBLIGATIONS WHEN DUE,
NOTWITHSTANDING ANY OCCURRENCE, CIRCUMSTANCE, EVENT, ACTION, OR OMISSION
WHATSOEVER, (INCLUDING, WITHOUT LIMITATION, THE UNENFORCEABILITY OF THE NOTE
AGAINST THE BORROWER WHETHER CONTEMPLATED OR UNCONTEMPLATED, AND WHETHER OR NOT
OTHERWISE OR PARTICULARLY DESCRIBED HEREIN, EXCEPT FOR THE FULL AND FINAL
PAYMENT AND SATISFACTION OF THE OBLIGATIONS.

                                   ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

         To induce Bank to extend credit to Borrower, Guarantor represents and
warrants to Bank that:

         Section 3.01. Familiarity and Reliance. Guarantor is familiar with, and
has independently reviewed books and records regarding the financial condition
of Borrower and the terms of the Notes, Loan Agreement and other Loan Documents
(as defined in the Loan Agreement);

         Section 3.02. No Representation by Bank. Neither Bank nor any other
party has made any representation, warranty or statement to Guarantor in order
to induce Guarantor to execute this Guaranty;

         Section 3.03. Guarantor's Financial Condition. As of the date hereof,
and after giving effect to this Guaranty and the contingent obligation evidenced
hereby, Guarantor is, and will be, solvent, and has and will have assets which,
fairly valued, exceed its obligations, liabilities and debts, and has property
and assets sufficient to satisfy and repay its obligations and liabilities as
they mature;

         Section 3.04. Benefit. Guarantor has received, or will receive, direct
or indirect benefit from the making of this Guaranty and the indebtedness
evidenced by the Notes;

         Section 3.05. Directors' Determination of Benefit. Guarantor's board of
directors, acting pursuant to a duly called and constituted meeting, after
proper notice, or pursuant to a valid unanimous consent, has determined that
this Guaranty directly or indirectly benefits Guarantor and is in its best
interests;

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         Section 3.06. Legality. The execution, delivery and performance by
Guarantor of this Guaranty and the consummation of the transactions contemplated
hereunder (a) have been duly authorized by all necessary corporate and
stockholder action of Guarantor, and (b) do not, and will not, contravene or
conflict with any law, statute or regulation whatsoever to which Guarantor is
subject or constitute a default (or an event which with notice or lapse of time
or both would constitute a default) under, or result in the breach of, any
indenture, mortgage, deed of trust, charge, lien, or any contract, agreement or
other instrument to which Guarantor is a party or which may be applicable to
Guarantor or any of its assets, or violate any provisions of its Articles (or
Certificate) of Incorporation, Bylaws or any other organizational document of
Guarantor; this Guaranty is a legal, valid and binding obligation of Guarantor
and is enforceable in accordance with its terms, except as limited by
bankruptcy, insolvency or other laws of general application relating to the
enforcement of creditors' rights;

         Section 3.07. Organization and Good Standing. Guarantor (a) is, and
will continue to be, a corporation duly organized, validly existing, and in good
standing under the laws of the state in which it is incorporated, and (b)
possesses all requisite power and authority to execute and deliver and comply
with the terms of this Guaranty; and

         Section 3.08. Survival. All representations and warranties made by
Guarantor herein shall survive the execution hereof.

                                   ARTICLE IV

                     SUBORDINATION OF CERTAIN INDEBTEDNESS;
                              WAIVER OF SUBROGATION

         Section 4.01. Subordination of All Guarantor Claims. As used herein,
the term "Guarantor Claims" shall mean all debts and liabilities of Borrower to
Guarantor, whether such debts and liabilities now exist or are hereafter
incurred or arise, or whether the obligations of Borrower thereon be direct,
contingent, primary, secondary, several, joint and several, or otherwise, and
irrespective of whether such debts or liabilities be evidenced by note,
contract, open account, or otherwise, and irrespective of the person or persons
in whose favor such debts or liabilities may, at their inception, have been, or
may hereafter be created, or the manner in which they have been or may hereafter
be acquired by Guarantor. Except as otherwise allowed under the Loan Agreement,
until the Obligations shall be paid and satisfied in full, and in cash as to
monetary Obligations, and Guarantor shall have performed all of its obligations
hereunder, Guarantor shall not receive or collect, directly or indirectly, from
Borrower or any other party any amount upon the Guarantor Claims.

         Section 4.02. Waiver of Subrogation. Unless and until the Obligations
have been paid in full and subject to SECTION 4.07, Guarantor hereby waives and
releases, to the fullest extent permitted by law:

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                  (a) Any and all rights that would result in Guarantor being
         deemed a "creditor", under the United States Bankruptcy Code, of
         Borrower or any other person, on account of payments made or
         obligations performed by Guarantor relating to this Guaranty; and

                  (b) Any claim, right or remedy which Guarantor may now have or
         hereafter acquire against Borrower that arises hereunder and/or from
         the performance by any Guarantor hereunder including, without
         limitation, any claim, remedy or right of subrogation, reimbursement,
         exoneration, contribution, indemnification, or participation in any
         claim, right or remedy of Bank against Borrower or any security which
         now has or hereafter acquires, whether or not such claim, right or
         remedy arises in equity under contract, by statute, under common law or
         otherwise.

         Section 4.03. Claims in Bankruptcy. In the event of receivership,
bankruptcy, reorganization, arrangement, debtor's relief, or other insolvency
proceedings involving Borrower as debtor, Bank shall have the right to prove
their claims in any such proceeding so as to establish their rights hereunder
and receive directly from the receiver, trustee or other court custodian
dividends and payments which would otherwise be payable upon Guarantor Claims.
Guarantor hereby assigns such dividends and payments to Bank.

         Section 4.04. Payments Held in Trust. In the event that,
notwithstanding SECTIONS 4.01, 4.02 and 4.03 above, Guarantor should receive any
funds, payment, claim or distribution which is prohibited by such Sections,
Guarantor agrees to hold in trust for Bank an amount equal to the amount of all
funds, payments, claims or distributions so received, and agrees that it shall
have absolutely no dominion over the amount of such funds, payments, claims or
distributions, except to pay them promptly to Bank, and Guarantor covenants
promptly to pay the same to Bank.

         Section 4.05. Liens Subordinate. Guarantor agrees that any liens,
security interests, judgment liens, charges or other encumbrances upon
Borrower's assets securing payment of the Guarantor Claims shall be and remain
inferior and subordinate to any liens, security interests, judgment liens,
charges or other encumbrances upon Borrower's assets securing payment of the
Obligations, regardless of whether such encumbrances in favor of Guarantor or
Bank presently exist or are hereafter created or attached. Without the prior
written consent of Bank, Guarantor shall not (a) exercise or enforce any
creditor's right it may have against Borrower, or (b) foreclose, repossess,
sequester or otherwise take steps or institute any action or proceedings
(judicial or otherwise, including without limitation the commencement of, or
joinder in, any liquidation, bankruptcy, rearrangement, debtor's relief or
insolvency proceeding) to enforce any liens, mortgages, deeds of trust, security
interest, collateral rights, judgments or other encumbrances on assets of
Borrower held by Guarantor.

         Section 4.06. Notation of Records. All promissory notes, accounts
receivable ledgers or other evidences of the Guarantor Claims accepted by or
held by Guarantor shall contain a specific written notice thereon that the
indebtedness evidenced thereby is subordinated under the terms of this Guaranty.

         Section 4.07. Disgorged Payments. If after receipt of any payment of
all or any part of the Obligations, Bank is for any reason compelled to
surrender such payment to any person or

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entity because such payment is determined to be void or voidable as a
preference, impermissible setoff, or a diversion of trust funds, or for any
reason, this Guaranty shall continue in full force notwithstanding any contrary
action which may have been taken by Bank in reliance upon such payment, and any
such contrary action so taken shall be without prejudice to Bank's rights under
this Guaranty and shall be deemed to have been conditioned upon such payment
having become final and irrevocable.

                                    ARTICLE V

                                  MISCELLANEOUS

         Section 5.01. Waiver. No failure to exercise, and no delay in
exercising, on the part of Bank, any right hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise thereof preclude any other or
further exercise thereof or the exercise of any other right. The rights of Bank
hereunder shall be in addition to all other rights provided by law. No
modification or waiver of any provision of this Guaranty, nor consent to
departure therefrom, shall be effective unless in writing and signed by Bank and
no such consent or waiver shall extend beyond the particular case and purpose
involved. No notice or demand given in any case shall constitute a waiver of the
right to take other action in the same, similar or other instances without such
notice or demand.

         Section 5.02. Notices. Any notices or other communications required or
permitted to be given by this Guaranty must be given in writing and in the
manner set forth in the Loan Agreement. Any such notices or other communications
must be given to the Bank at the address set forth in the Loan Agreement and to
the Guarantor at the address set forth on the signature page hereto or at such
other address as Guarantor or the Bank shall so designate in writing.

         Section 5.03. Usury Compliance. It is the intention of Borrower,
Guarantor and Bank to conform strictly to applicable usury laws. Accordingly, no
agreements, conditions, provisions or stipulations contained in this Guaranty or
any other instrument, document or agreement between Guarantor or Borrower and
Bank or default of Guarantor or Borrower, or the exercise by Bank of the right
to accelerate the payment of the maturity of principal and interest, or to
exercise any option whatsoever contained in this Guaranty or any other agreement
between Guarantor or Borrower and Bank, or the arising of any contingency
whatsoever, shall entitle Bank to collect, in any event, interest exceeding the
maximum rate of interest permitted by applicable state or federal law in effect
from time to time hereafter (the "Maximum Legal Rate") and in no event shall
Guarantor be obligated to pay interest exceeding such Maximum Legal Rate and all
agreements, conditions or stipulations, if any, which may in any event or
contingency whatsoever operate to bind, obligate or compel Guarantor to pay a
rate of interest exceeding the Maximum Legal Rate, shall be without binding
force or effect, at law or in equity, to the extent only of the excess of
interest over such Maximum Legal Rate. In the event any interest is charged in
excess of the Maximum Legal Rate ("Excess"), Guarantor acknowledges and
stipulates that any such charge shall be the result of an accident and bona fide
error, and such Excess shall be, first, applied to reduce the principal then
unpaid hereunder; second, applied to reduce the Obligations; and third, returned
to Guarantor, it being the intention of the parties

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hereto not to enter at any time into a usurious or otherwise illegal
relationship. Guarantor recognizes that, with fluctuations in the applicable
rate on the Obligations and the Maximum Legal Rate, such an unintentional result
could inadvertently occur. By the execution of this Guaranty, Guarantor
covenants that the credit or return of any Excess shall constitute the
acceptance by Guarantor of such Excess.

         Section 5.04. Choice of Law; Forum Selection. This Agreement and the
other Loan Documents are being executed and delivered, and are intended to be
performed in the State of Texas. Except to the extent that the laws of the
United States may apply to the terms of this Agreement or any other Loan
Document, the substantive laws of the State of Texas shall govern the validity,
construction, enforcement and interpretation of this Guaranty. In the event of a
dispute involving this Guaranty, Guarantor irrevocably agrees that venue for
such dispute shall lie in any court of competent jurisdiction in Dallas County,
Texas.

         Section 5.05. Invalid Provisions. In the case any one or more of the
provisions contained in this Guaranty should be invalid, illegal or
unenforceable in any respect, the validity, legality and enforceability of the
remaining provisions contained therein shall not in any way be affected thereby,
unless such continued effectiveness of this Guaranty, as modified, would be
contrary to the basic understandings and intentions of the parties as expressed
herein.

         Section 5.06. Parties Bound. This Guaranty shall be binding upon and
inure to the benefit of the parties hereto and their respective successors,
assigns and legal representatives; provided, however, that Guarantor may not,
without the prior written consent of Bank, assign any of its rights, powers,
duties or obligations hereunder.

         Section 5.07. Headings. Section headings are for convenience of
reference only and shall in no way affect the interpretation of this Guaranty.

         Section 5.08. Multiple Counterparts. This Guaranty may be executed in
multiple counterparts, all of which taken together shall constitute one and the
same agreement, and any of the parties hereto may execute this Guaranty by
signing any counterpart.

         Section 5.09. Rights and Remedies. If Guarantor becomes liable for any
indebtedness owing by Borrower to Bank, by endorsement or otherwise, other than
under this Guaranty, such liability shall not be in any manner impaired or
affected hereby and the rights of Bank hereunder shall be cumulative of any and
all other rights that Bank may ever have against Guarantor. The exercise by Bank
of any right or remedy hereunder or under any other instrument, or at law or in
equity, shall not preclude the concurrent or subsequent exercise of any other
right or remedy.

         SECTION 5.10. INDEMNITY. GUARANTOR HEREBY AGREES TO INDEMNIFY, HOLD
HARMLESS, AND DEFEND BANK AND ITS DIRECTORS, OFFICERS, AGENTS, COUNSEL AND
EMPLOYEES ("INDEMNIFIED PERSONS") FROM AND AGAINST ANY AND ALL LOSSES,
LIABILITIES, DAMAGES, COSTS, EXPENSES, SUITS, ACTIONS AND PROCEEDINGS ("LOSSES")
EVER SUFFERED OR INCURRED BY ANY INDEMNIFIED PERSON ARISING OUT OF OR RELATING
TO THIS GUARANTY, ANY OTHER LOAN DOCUMENT OR ANY OTHER

UNCONDITIONAL GUARANTY AGREEMENT - Page 10
(TIDEL CASH SYSTEMS, INC.)
<PAGE>   11

TRANSACTION CONTEMPLATED HEREBY AND THEREBY, INCLUDING, WITHOUT LIMITATION, ANY
LOSSES CAUSED BY THE NEGLIGENCE OF SUCH INDEMNIFIED PERSON, BUT NOT INCLUDING
ANY LOSSES CAUSED BY THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF SUCH
INDEMNIFIED PERSON OR THE DEFAULT BY SUCH INDEMNIFIED PERSON OF SUCH INDEMNIFIED
PERSON'S OBLIGATIONS UNDER ANY LOAN DOCUMENT, AND GUARANTOR SHALL REIMBURSE BANK
AND EACH OTHER INDEMNIFIED PERSON FOR ANY EXPENSES (INCLUDING IN CONNECTION WITH
THE INVESTIGATION OF, PREPARATION FOR OR DEFENSE OF ANY ACTUAL OR THREATENED
CLAIM, ACTION OR PROCEEDING ARISING HEREFROM AND THEREFROM, INCLUDING ANY SUCH
COSTS OF RESPONDING TO DISCOVERY REQUESTS OR SUBPOENAS, REGARDLESS OF WHETHER
BANK OR SUCH OTHER INDEMNIFIED PERSON IS A PARTY THERETO). WITHOUT LIMITING THE
GENERALITY OF THE FOREGOING, THIS INDEMNITY SHALL EXTEND TO ANY CLAIMS ASSERTED
AGAINST BANK OR ANY OTHER INDEMNIFIED PERSON BY ANY PERSON OR ENTITY UNDER ANY
ENVIRONMENTAL LAWS OR SIMILAR LAWS BY REASON OF THE BORROWER'S, GUARANTOR'S OR
ANY OTHER PERSON'S OR ENTITY'S FAILURE TO COMPLY WITH LAWS APPLICABLE TO SOLID
OR HAZARDOUS WASTE MATERIALS OR OTHER TOXIC SUBSTANCES. EACH INDEMNIFIED PERSON
MAY SELECT ITS OWN COUNSEL WITH RESPECT TO ANY LOSSES, IN ADDITION TO THE
GUARANTOR'S COUNSEL, AND SHALL BE INDEMNIFIED THEREFOR HEREUNDER.
NOTWITHSTANDING ANY CONTRARY PROVISION OF THIS GUARANTY, THE OBLIGATIONS OF THE
GUARANTOR UNDER THIS SECTION 5.10 SHALL SURVIVE THE PAYMENT IN FULL OF THE
BORROWER'S OBLIGATIONS UNDER THE LOAN AGREEMENT AND THE TERMINATION OF THE LOAN
AGREEMENT AND THIS GUARANTY.

         SECTION 5.11. NOTICE OF FINAL AGREEMENT. THIS GUARANTY CONSTITUTES A
WRITTEN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES. SUCH
WRITTEN AGREEMENT MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS,
OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES RELATING TO THIS GUARANTY.

         EXECUTED as of the day and year first above written.

                                        GUARANTOR:

                                        TIDEL CASH SYSTEMS, INC.

                                        By:
                                           -------------------------------------
                                           Mark K. Levenick, President and Chief
                                           Executive Officer

                                        Address for Notices:

                                        5847 San Felipe, Suite 900
                                        Houston, Texas 77057

UNCONDITIONAL GUARANTY AGREEMENT - Page 11
(TIDEL CASH SYSTEMS, INC.)<PAGE>   1
                                                                    EXHIBIT 4.11

                          PLEDGE AND SECURITY AGREEMENT
                                     (STOCK)

         THIS PLEDGE AND SECURITY AGREEMENT (this "Agreement") is executed as of
the 1st day of April, 1999 by TIDEL TECHNOLOGIES, INC., a Delaware corporation
("Pledgor"), in favor of CHASE BANK OF TEXAS, N.A., a national banking
association ("Pledgee").

                                    RECITALS:

         A. Tidel Engineering, L.P., a Delaware limited partnership (the
"Borrower"), Pledgor and Pledgee have entered into that certain Credit Agreement
dated of even date herewith (as amended, modified or supplemented from time to
time, the "Loan Agreement"), pursuant to which Pledgee has agreed to make
available to Borrower certain credit facilities subject to the terms and
conditions contained therein.

         B. Pledgor is the legal, record and beneficial owner of:

                  (i)      100 shares of the issued and outstanding common
                           stock, $0.01 par value of Tidel Services, Inc.
                           ("TSI"), evidenced by TSI common stock certificate
                           no. 1, registered in the name of Pledgor;

                  (ii)     100 shares of the issued and outstanding common
                           stock, $0.01 par value of Tidel Cash Systems, Inc.
                           ("TCS"), evidenced by TCS common stock certificate
                           no. 2, registered in the name of Pledgor; and

                  (iii)    680,818 shares of the issued and outstanding common
                           stock, $0.01 par value of 3CI Complete Compliance
                           Corporation ("3CI"), evidenced by 3CI common stock
                           certificates nos. C-0063, C-0070, C-0094 and C-0319
                           through C-0324, registered in the name of Pledgor.

All of the common stock described in clauses (i), (ii) and (iii) preceding are
referenced to collectively as the "Initial Pledged Stock". Each of TSI, TCS and
3CI are individually referred to herein as an "Issuer", and collectively, the
"Issuers", as applicable.

         C. It is a condition precedent to the obligations of Pledgee under the
Loan Agreement that Pledgor shall have executed and delivered this Agreement to
Pledgee.

         D. Pledgor, by virtue of its ownership of the Initial Pledged Stock,
deems it to be in its best interest, based on sound judgment, in that valuable
benefits will be derived by the Pledgor by virtue of the Loans, to execute and
deliver to Pledgee this Agreement.

         E. In consideration of these premises and in order to induce Pledgee to
extend the credit pursuant to the Loan Agreement, and for other good and
valuable consideration, the

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 1

<PAGE>   2

receipt and sufficiency of which is hereby acknowledged, the Pledgor and Pledgee
hereby agree as follows:

                                   AGREEMENTS:

         1. Defined Terms. Unless otherwise defined herein, terms defined in the
Loan Agreement shall have such defined meanings when used herein.

         2. Pledge. The Pledgor hereby pledges, assigns, hypothecates, transfers
and delivers to the Pledgee, and hereby grants to Pledgee a first lien on, and
security interest in, (a) the Initial Pledged Stock, (b) all shares of stock,
common or preferred, options, interests, participations, and other equivalents,
warrants, convertible debentures and all agreements, instruments and documents
convertible, in whole or part, into any one or more of the foregoing
(collectively, "Stock") of the Issuers which Pledgor shall, from time to time,
become entitled to receive or shall receive as set forth in SECTION 3 hereof
(together with any Stock options or rights received pursuant to SECTION 3
hereof, the "Additional Pledged Stock"; the Additional Pledged Stock and the
Initial Pledged Stock being sometimes hereinafter referred to as the "Pledged
Stock"), (c) all other Collateral (as defined in SECTION 4 hereof) as may be
pledged to Pledgee at any time and from time to time hereunder and (d) all
proceeds thereof, together with appropriate undated stock powers duly executed
in blank, as collateral security for (i) the due and punctual payment and
performance by Pledgor of its obligations, covenants, agreements and
liabilities, absolute or contingent, liquidated or unliquidated, now existing or
hereinafter incurred under, arising out of or in connection with this Agreement,
(ii) the prompt and complete payment when due (whether at the stated due date,
by acceleration or otherwise) of the unpaid principal of and interest on the
Notes issued to evidence the Loans made by Pledgee to Borrower pursuant to the
Loan Agreement as well as collection costs therefor, and (iii) the due and
punctual payment and performance by Borrower of all Obligations (as defined in
the Loan Agreement) to Pledgee, absolute or contingent, liquidated or
unliquidated, now existing or hereinafter incurred (all the foregoing being
hereinafter called the "Obligations").

         3. Stock Dividends, Distributions, etc. If, while this Agreement is in
effect, the Pledgor shall become entitled to receive or shall receive any Stock
certificate (including, without limitation, any certificate representing a Stock
dividend or a distribution in connection with any reclassification, increase or
reduction of capital, or issued in connection with any reorganization), option
or rights, whether as an addition to, in substitution of, or in exchange for any
shares of any Pledged Stock, or otherwise, the Pledgor agrees to accept the same
as Pledgee's agent and to hold the same in trust on behalf of and for the
benefit of the Pledgee segregated from the other assets of the Pledgor and to
deliver the same forthwith to the Pledgee, in the exact form received, with the
endorsement of the Pledgor, when necessary and/or appropriate, to undated stock
powers, duly executed in blank, to be held by the Pledgee, subject to the terms
hereof, as additional collateral security for the Obligations, and such other
documents as the Pledgee shall reasonably request in order to perfect the
Pledgee's security interest therein. Any sums paid upon or in respect of the
Pledged Stock upon the liquidation or dissolution of any Issuer shall be paid
over to the Pledgee, to be held by it in trust as additional collateral security
for the Obligations; and in case any distribution of capital shall be made on or
in respect of the Pledged Stock or any property shall be distributed upon or
with respect to the

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 2

<PAGE>   3

Pledged Stock pursuant to the recapitalization or reclassification of the
capital of any Issuer or pursuant to the reorganization thereof, the property so
distributed shall be delivered to the Pledgee, to be held by it as additional
collateral security for the Obligations. All sums of money and property so paid
or distributed in respect of the Pledged Stock which are received by the Pledgor
shall, until paid or delivered to the Pledgee, be held by the Pledgor in trust,
segregated from the other assets of the Pledgor, as additional collateral
security for the Obligations.

         4. Collateral. The Pledged Stock and all other property at any time and
from time to time pledged to Pledgee hereunder (whether described in SCHEDULE l
hereof or not) and all income therefrom and proceeds thereof, are herein
collectively sometimes called the "Collateral".

         5. Record Ownership of Pledged Stock. Whether or not an Event of
Default has occurred and is continuing, Pledgee at any time may have the Pledged
Stock registered in its name, or in the name of its nominee or nominees, as
pledgee; and, as to any Pledged Stock so registered, Pledgee shall execute and
deliver (or cause to be executed and delivered) to Pledgor all such proxies,
powers of attorney, dividend coupons or orders, and other documents as Pledgor
may reasonably request for the purpose of enabling Pledgor to exercise the
voting rights and powers which it is entitled to exercise under this Agreement
and to receive the dividends and other payments in respect of the Pledged Stock
which it is authorized to receive and retain under this Agreement and the Loan
Agreement.

         6. Voting of Pledged Stock. As long as an Event of Default has not
occurred and is not continuing, Pledgor shall be entitled to exercise all voting
rights pertaining to the Pledged Stock; provided, however, that no vote shall be
cast or consent, waiver or ratification given or action taken which would impair
the Collateral or violate any provision of this Agreement, the Loan Agreement or
the Loan Documents. After the occurrence and during the continuance of an Event
of Default, the right to vote the Pledged Stock and all other corporate rights
pertaining to the Pledged Stock shall be vested exclusively in Pledgee,
including any and all rights of conversion, exchange, subscription or any other
rights, privileges or options pertaining to any shares of the Pledged Stock as
if Pledgee were the absolute owner thereof, including, without limitation, the
right to exchange at its discretion any and all of the Pledged Stock upon the
merger, consolidation, reorganization, recapitalization or other readjustment of
any Issuer or upon the exercise by such Issuer or the Pledgee of any right,
privilege or option pertaining to any shares of the Pledged Stock, and in
connection therewith, to deposit and deliver any and all of the Pledged Stock
with any committee, depositary, transfer agent, registrar or other designated
agency upon such terms and conditions as it may determine, all without liability
except to account for property actually received by it, but the Pledgee shall
have no duty to exercise any of the aforesaid rights, privileges or options or
be responsible for any failure to do so or delay in so doing. To this end,
Pledgor hereby irrevocably constitutes and appoints Pledgee the proxy and
attorney-in-fact of Pledgor, with full power of substitution, to vote, and to
act with respect to, the Pledged Stock standing in the name of Pledgor or with
respect to which Pledgor is entitled to vote and act, subject to the
understanding that such proxy may not be exercised unless an Event of Default
has occurred and is continuing. The proxy herein granted is coupled with an
interest, is irrevocable, and shall continue until the Obligations have been
paid and performed in full.

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 3

<PAGE>   4

         7. Limitations on Pledgee's Obligations. The Pledgee shall not be
liable for failure to collect or realize upon the Obligations or any collateral
security or guarantee therefor, or any part thereof, or for any delay in so
doing nor shall the Pledgee be under any obligation to take any action
whatsoever with regard thereto.

         8. The Pledgee's Appointment as Attorney-in-Fact. (a) In addition to,
and without limiting the scope of any other provision in this Agreement, the
Pledgor hereby irrevocably constitutes and appoints the Pledgee and any officer
or agent thereof, with full power of substitution, as its true and lawful
attorney-in-fact with full irrevocable power and authority in the place and
stead of the Pledgor and in the name of the Pledgor or in its own name, from
time to time in the Pledgee's discretion, for the purpose of carrying out the
actions and to execute any and all documents and instruments which may be
necessary or desirable to accomplish the purposes of this Agreement and, without
limiting the generality of the foregoing, hereby gives the Pledgee the power and
right, on behalf of the Pledgor, without notice to or assent by the Pledgor to
do the following upon the occurrence and during the continuance of an Event of
Default: (i) to ask, demand, collect, receive and give acquittances and receipts
for any and all monies due and to become due under the Collateral; (ii) in the
name of the Pledgor or its own name or otherwise, to take possession of and
endorse and collect any checks, drafts, notes, acceptances or other instruments
for the payment of moneys due under the Collateral; (iii) to file any claim or
to take any other action or proceeding in any court of law or equity or
otherwise deemed appropriate by the Pledgee for the purpose of collecting any
and all such moneys due under the Collateral whenever payable; (iv) to pay or
discharge taxes, liens, security interests or other encumbrances levied or
placed on or threatened against the Collateral; (v) to direct any party liable
for any payment under the Collateral to make payment of any and all moneys due
and to become due thereunder directly to the Pledgee or as the Pledgee shall
direct; (vi) to receive payment of and receipt for any and all moneys, claims
and other amounts due and to become due at any time in respect of or arising out
of any Collateral; (vii) to commence and prosecute any suits, actions or
proceedings at law or in equity in any court of competent jurisdiction to
collect the Collateral or any part thereof and to enforce any other right in
respect of the Collateral; (viii) to defend any suit, action or proceeding
brought against the Pledgor with respect to any Collateral; (ix) to settle,
compromise or adjust any suit, action or proceeding described above and, in
connection therewith, to give such discharges or releases as the Pledgee may
deem appropriate; (x) exercise voting rights attributable to the Pledged Stock
pursuant to SECTION 6; and (xi) generally to sell, transfer, pledge, make any
agreement with respect to or otherwise deal with any of the Collateral as fully
and completely as though the Pledgee were the absolute owner thereof for all
purposes, and to do, at the Pledgee's option and the Pledgor's expense, at any
time, or from time to time, all acts and things which the Pledgee deems
necessary to protect, preserve or realize upon the Collateral and the Pledgee's
security interest therein, in order to effect the intent of this Agreement, all
as fully and effectively as the Pledgor might do.

         The Pledgor hereby ratifies all that said attorneys shall lawfully do
or cause to be done by virtue hereof. This power of attorney is a power coupled
with an interest and shall be irrevocable.

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 4

<PAGE>   5

         (b) The powers conferred on the Pledgee hereunder are solely to protect
its interests in the Collateral and shall not impose any duty upon it to
exercise any such powers. Pledgee shall be accountable only for amounts that it
actually receives as a result of the exercise of such powers and neither it nor
any of its officers, directors, employees or agents shall be responsible to the
Pledgor for any act or failure to act.

         (c) The Pledgor also authorizes the Pledgee, at any time and from time
to time, to execute, in connection with any sale of the Collateral, any
endorsements, assignments or other instruments of conveyance or transfer with
respect to the Collateral.

         9. Performance by the Pledgee of the Pledgor's Obligations. If the
Pledgor fails to perform or comply with any of its agreements contained herein
and the Pledgee, as provided for by the terms of this Agreement, shall itself
perform or comply, or otherwise cause performance or compliance, with such
agreement, then the expenses of the Pledgee incurred in connection with such
performance or compliance, together with interest thereon to accrue at a rate of
interest equal to the Highest Lawful Rate from the date such expenses are
incurred, shall be payable by the Pledgor to the Pledgee on demand and shall
constitute Obligations secured hereby.

         10. Events of Default. The occurrence of any of the following shall
constitute an "Event of Default" under this Agreement:

         (a) The Pledgor shall fail to pay its Obligations when due;

         (b) Any representation, warranty or statement made or deemed made by
the Pledgor herein or in connection herewith shall prove to have been incorrect
or untrue in any material respect on or as of the date made or deemed made;

         (c) The Pledgor shall default in the observance or performance of any
term, covenant, or agreement contained herein and Pledgor shall fail to cure
such default within fifteen (15) days after the occurrence of such default; or

         (d) An Event of Default (subject to any applicable cure period), as
such term is defined in the Loan Agreement, shall occur and be continuing.

         11. Remedies. (a) Upon the occurrence and during the continuance of any
Event of Default, and at any time thereafter, the Pledgee may declare all of the
Obligations or any part thereof immediately due and payable and, without demand
of performance or other demand, advertisement or notice of any kind (except the
notice specified below of time and place of public or private sale) to or upon
the Pledgor or any other person (all and each of which demands, advertisements
and/or notices are hereby expressly waived), may forthwith collect, receive,
appropriate and realize upon the Collateral, or any part thereof, and/or may
forthwith sell, assign, give option or options to purchase, contract to sell or
otherwise dispose of and deliver said Collateral, or any part thereof, in one or
more parcels at public or private sale or sales, at any exchange, broker's board
or at the Pledgee's offices or elsewhere upon such terms and conditions as it
may deem advisable and at such prices as it may deem best, for cash or on credit
or for future delivery without assumption of any credit risk, with the right to
the Pledgee

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 5

<PAGE>   6

upon any such sale or sales, public or private, to purchase the whole or any
part of said Collateral so sold, free of any right or equity of redemption in
the Pledgor, which right or equity is hereby expressly waived or released. The
Pledgee shall apply the net proceeds of any such collection, recovery, receipt,
appropriation, realization or sale, after deducting all reasonable costs and
expenses of every kind incurred therein or incidental to the care, safekeeping
or otherwise of any and all of the Collateral or in any way relating to the
rights of the Pledgee hereunder, including reasonable attorneys' fees and legal
expenses, to the payment in whole or in part of the Obligations in such order as
the Pledgee may elect, the Pledgor remaining liable for any deficiency remaining
unpaid after such application, and only after so applying such net proceeds and
after the payment by the Pledgee of any amount required by any provision of law,
including, without limitation, Section 9-504 (a) (3) of the Uniform Commercial
Code of the State of Texas (the "Code"), need the Pledgee account for the
surplus, if any, to the Pledgor. The Pledgor agrees that, to the extent
permitted by law, the Pledgee need not give more than ten (10) days' notice of
the time and place of any public sale or of the time after which a private sale
or other intended disposition is to take place and that such notice is
reasonable notification of such matters. No notification need be given to the
Pledgor if it has signed after default a statement renouncing or modifying any
right to notification of sale or other intended disposition. IN ADDITION TO THE
RIGHTS AND REMEDIES GRANTED TO IT IN THIS AGREEMENT AND IN ANY OTHER INSTRUMENT
OR AGREEMENT SECURING, EVIDENCING OR RELATING TO ANY OF THE OBLIGATIONS, THE
PLEDGEE SHALL HAVE ALL THE RIGHTS AND REMEDIES OF A SECURED PARTY UNDER THE
CODE. All waivers by the Pledgor of rights (including rights to notice) and all
rights and remedies afforded the Pledgor herein, and all other provisions of
this Agreement, are expressly made subject to any applicable mandatory
provisions of law limiting, or imposing conditions (including conditions as to
reasonableness) upon such waivers of the effectiveness thereof or any such
rights and remedies. Any sale or other disposition of the Collateral shall be in
compliance with all provisions of law (including applicable securities laws, and
regulations and applicable provisions of the Code).

         (b) If Pledgee shall determine to exercise its right to sell any or all
of the Pledged Stock pursuant to this SECTION 11 hereof, and if in the opinion
of counsel for Pledgee it is advisable to have the Pledged Stock, or that
portion thereof to be sold, registered under the provisions of the Securities
Act of 1933, as amended (the "Securities Act"), the Pledgor will cause the
Issuer of such Pledged Stock to execute and deliver, and cause the directors and
officers thereof to execute and deliver, all at the Pledgor's expense, all such
instruments and documents, and to do or cause to be done all such other acts and
things as may be necessary to register the Pledged Stock, or that portion
thereof to be sold, under the provisions of the Securities Act and to cause the
registration statement relating thereto to become effective and to remain
effective for a period of 180 days from the date of the first public offering of
the Pledged Stock, or that portion thereof to be sold, and to make all
amendments thereto and/or to the related prospectus which are necessary, all in
conformity with the requirements of the Securities Act and the rules and
regulations of the Securities and Exchange Commission applicable thereto. The
Pledgor agrees to cause each Issuer to comply with the provisions of the
securities or "Blue Sky" laws of any jurisdiction which Pledgee shall designate
and to cause each Issuer to make available to its security holders, as soon as
practicable, an earnings statement which will satisfy the provisions of Section
11(a) of the Securities Act.

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 6

<PAGE>   7

         (c) The Pledgor recognizes that the Pledgee may be unable to effect a
public sale of any or all the Pledged Stock by reason of certain prohibitions
contained in the Securities Act and applicable state securities laws, but may be
compelled to resort to one or more private sales thereof to a restricted group
of purchasers who will be obliged to agree, among other things, to acquire such
securities for their own account for investment and not with a view to the
distribution or resale thereof. The Pledgor acknowledges and agrees that any
such private sale may result in prices and other terms less favorable to the
seller than if such sale were a public sale and, notwithstanding such
circumstances, agrees that any such private sale shall be deemed to have been
made in a commercially reasonable manner. Pledgee shall be under no obligation
to delay a sale of any of the Pledged Stock for the period of time necessary to
permit the Issuer of such securities to register such securities for public sale
under the Securities Act, or under applicable state securities laws, even if
such Issuer would agree to do so.

         (d) The Pledgor further agrees to do or cause to be done all such other
acts and things as may be necessary to make such sale or sales of any portion of
all of the Pledged Stock valid and binding and in compliance with any and all
applicable laws, regulations, orders, writs, injunctions, decrees or awards of
any and all courts, arbitrators or governmental instrumentalities, domestic or
foreign, having jurisdiction over any such sale or sales, all at the Pledgor's
expense. The Pledgor further agrees that a breach of any of the covenants
contained in this SECTION 11 will cause irreparable injury to Pledgee, that
Pledgee has no adequate remedy at law in respect of such breach and, as a
consequence, agrees that each and every covenant contained in this paragraph
shall be specifically enforceable against the Pledgor and the Pledgor hereby
waives and agrees not to assert any defenses against an action for specific
performance of such covenants except for a defense that no default of the
covenants, terms or conditions of the Loan Agreement has occurred. The Pledgor
further acknowledges the impossibility of ascertaining the amount of damages
which would be suffered by Pledgee by reason of a breach of any such covenants
and, consequently, agrees that, if Pledgee shall sue for damages for breach,
Pledgor shall pay, as liquidated damages and not as a penalty, an amount equal
to the value of the Pledged Stock on the date Pledgee shall demand compliance
with this paragraph, but in no event to exceed the amount of the Obligations.

         12. Waiver of Subrogation. Notwithstanding anything to the contrary in
this Agreement, unless and until the Obligations have been indefeasibly paid and
performed in full, the Pledgor hereby irrevocably waives all rights Pledgor may
have at law or in equity (including, without limitation, any law subrogating the
Pledgor to the rights of the Pledgee) to seek contribution, indemnification, or
any other form of reimbursement from the Issuer, any other guarantor or pledgor,
or any other person now or hereafter primarily or secondarily liable for any
obligations of the Borrower to the Pledgee, for any disbursement made by the
Pledgor under or in connection with this Agreement or otherwise. The Pledgor
further agrees that, to the extent that the waiver of any such subrogation,
contribution, reimbursement, indemnity or otherwise is found to be void or
voidable for any reason, any such rights which the Pledgor may have shall be
junior and subordinate in all respects to the rights of the Pledgee against the
Borrower.

         13. Actions by Pledgee. No action that the Pledgee may take or omit to
take in connection with the Loan Agreement or any of the Loan Documents, any
indebtedness owing by

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 7

<PAGE>   8

Borrower to the Pledgee (including, without limitation, renewals, extensions,
modifications and increases thereof), or any security for the payment of any
indebtedness of Borrower to the Pledgee, or for the performance of any
obligation or undertaking of Borrower, nor any course of dealing with Borrower
or any other Person, shall release the Pledgor from its obligations hereunder,
affect this Agreement in any way, or afford the Pledgor any recourse against the
Pledgee. By way of example, but not in limitation of the foregoing, the Pledgor
hereby expressly agrees that the Pledgee may, from time to time, without notice
to the Pledgor:

                  (a) sell, assign, transfer or grant participations in the
Loans and/or any right held by the Pledgee pursuant to or in connection with the
Loan Agreement and the Loan Documents;

                  (b) amend, change, or modify, in whole or in part, any
documents or instruments evidencing, securing or relating to any indebtedness or
undertaking of Borrower to the Pledgee;

                  (c) accelerate, change, extend, or renew the time for payment
of the Notes or any other indebtedness arising under any documents or
instruments evidencing, securing or relating to any indebtedness or undertaking
of Borrower to the Pledgee;

                  (d) compromise or settle any amount due or owing, or claimed
to be due or owing, under the Notes or under any documents or instruments
evidencing, securing or relating to any indebtedness or undertaking of Borrower
to the Pledgee;

                  (e) surrender, release, or subordinate any or all security for
any indebtedness or undertaking of Borrower to the Pledgee or accept additional
or substituted security therefor;

                  (f) release any guarantor or pledgor of any indebtedness or
undertaking of the Borrower to the Pledgee, or substitute or add additional
guarantors or pledgors; and

                  (g) apply collateral securing the Notes to other indebtedness
also secured by such collateral.

The provisions of this Agreement shall extend and be applicable to all renewals,
increases, amendments, extensions, modifications of and substitutions for the
Loan Agreement and the Loan Documents, and all references herein to the Loan
Agreement and the Loan Documents shall be deemed to include any renewal,
increase, extension, amendment or modification thereof or substitution therefor.

         14. No Impairment. The obligations, guaranties, undertakings,
covenants, agreements and duties of the Pledgor under this Agreement shall not
be affected or impaired by any of the following, although without notice to or
consent of the Pledgor:

         (a) any failure, omission or delay on the part of the Pledgee (i) to
enforce, assert or exercise any right, power or remedy conferred on the Pledgee
by the provisions of the Loan Agreement and the Loan Documents or otherwise
inuring to the holders of the rights of the Pledgee under the Loan Agreement and
the Loan Documents, or (ii) to make demand first upon Borrower or to proceed
against Borrower;

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 8

<PAGE>   9

         (b) the voluntary or involuntary liquidation, dissolution, sale of all
or substantially all assets, marshalling of assets or liabilities, receivership,
conservatorship, assignment for the benefit of creditors, insolvency,
bankruptcy, reorganization, arrangement, composition or other proceedings under
laws for the protection of debtors affecting Borrower or any of the assets of
Borrower, or any discharge from liability or rejection of burdensome contracts
or obligations in the course of or resulting from any such proceedings;

         (c) the release, by operation of law or otherwise, of Borrower or any
guarantor from any obligation under the Loan Agreement or any of the Loan
Documents;

         (d) the invalidity, deficiency, illegality or unenforceability of the
Loan Agreement and the Loan Documents, in whole or in part, or of any of the
provisions thereof, or failure to perfect or maintain perfection of any
security, or any defense or excuse for failure to perform on account of force
majeure, act of God, casualty, impossibility, impracticability, or other defense
or excuse whatsoever; or

         (e) without limiting the foregoing, any fact or event (whether or not
similar to any of the foregoing) which in the absence of this provision would or
might constitute or afford a legal or equitable discharge or release of or
defense to a guarantor or surety.

None of the foregoing shall be a defense to this Agreement, and this Agreement
is a primary obligation of the Pledgor.

         15. Other Pledgors or Guarantors. The liabilities and obligations of
the Pledgor hereunder shall not be reduced or limited by reason of any guaranty
or pledge executed in favor of the Pledgee by any other Person, and this
Agreement shall be enforceable against the Pledgor without regard to any such
guaranty or pledge.

         16. Representations, Warranties and Covenants of the Pledgor. The
Pledgor represents and warrants that (a) it is the legal, record and beneficial
owner of, and has good and, subject to applicable securities laws described in
SECTION 11 hereof, marketable title to, the Initial Pledged Stock, subject to no
pledge, lien, mortgage, hypothecation, security interest, charge, option, voting
proxy or other encumbrance whatsoever, except the existing lien and security
interest created by this Agreement; (b) it is duly organized, validly existing
and in good standing under the laws of its jurisdiction of incorporation and has
full power, authority and legal right to pledge the Initial Pledged Stock
pursuant to this Agreement; (c) this Agreement has been duly authorized,
executed and delivered by Pledgor and constitutes a legal, valid and binding
obligation of the Pledgor, and is enforceable in accordance with its terms; (d)
no consent of any other party (including, without limitation, the stockholders
or creditors of the Pledgor) and no consent, license, permit, approval or
authorization of, exemption by, notice or report to, or registration, filing or
declaration with, any Governmental Authority, domestic or foreign, is required
to be obtained by the Pledgor or the Pledgee in connection with the execution,
delivery or performance of this Agreement or the pledge of such shares
hereunder, in each case which has not been obtained or made, as the case may be,
and is not in full force and effect; (e) the execution, delivery and performance
of this Agreement will not violate any provision of any

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 9

<PAGE>   10

applicable law, or of any mortgage, indenture, lease, contract, or other
agreement, instrument or undertaking to which Pledgor is a party or which
purports to be binding upon Pledgor or upon any of its assets and will not
result in the creation or imposition of any lien, charge or encumbrance on or
security interest in any of the assets of Pledgor except as contemplated by this
Agreement or the Loan Agreement; (f) all the shares of the Initial Pledged Stock
have been duly and validly issued, are fully paid and non-assessable and have
not been issued in violation of any preemptive or other rights of any person;
(g) the Pledgor has not created any options, warrants, rights, calls,
commitments, plans, contracts or other agreements of any character, which
provide for the purchase, issuance or transfer of any shares of capital stock of
Issuer pledged hereby; and (h) the pledge, assignment and delivery of such
Initial Pledged Stock pursuant to this Agreement constitutes and, provided
Pledgee retains possession of the Initial Pledged Stock, at all times
(disregarding, however the effects of the change in any law relating to the
pledge of stock generally) will constitute a valid first lien on and a first
perfected security interest in such shares of the Initial Pledged Stock, and the
proceeds thereof, subject to no prior Lien, or to any agreement purporting to
grant to any third party other than Pledgee a security interest in the property
or assets of the Pledgor which would include the Initial Pledged Stock. Pledgor
covenants and agrees that at its expense it will defend the right, title and
security interest of the Pledgee in and to the Pledged Stock and the proceeds
thereof against the claims and demands of all persons whomsoever; and covenants
and agrees that he will have like title to and right to pledge any other
property at any time hereafter pledged to the Pledgee as Collateral hereunder
and will likewise defend the right of the Pledgee thereto and security interest
therein.

         17. No Disposition. etc. Without the prior written consent of the
Pledgee, Pledgor agrees that it will not sell, assign, transfer, exchange, or
otherwise dispose of, or grant any option with respect to, the Collateral, nor
will it create, incur or permit to exist any pledge, lien, mortgage,
hypothecation, security interest, charge, option or any other encumbrance with
respect to any of the Collateral, or any interest therein, or any proceeds
thereof, except for the lien and security interest provided for by this
Agreement and except as permitted by this Agreement or by the Loan Agreement.
Without the prior written consent of the Pledgee, the Pledgor agrees that it
will not vote to enable any Issuer to issue or sell any stock or other
securities of any nature in addition to or in exchange or substitution for the
Pledged Stock or grant or issue any options, warrants, or rights of any kind to
acquire, or securities convertible into, shares of such Issuer's stock.

         18. Further Assurances. Pledgor agrees that at any time and from time
to time upon the written request of the Pledgee, the Pledgor will execute and
deliver such further documents and do such further acts and things which are
necessary in the reasonable judgment of the Pledgee to effect the purpose of
this Agreement or to obtain, maintain and perfect the security interest granted
under this Agreement in any applicable jurisdiction, and any expense of Pledgee
so incurred shall be a part of the Obligations.

         19. Severability. Any provision of this Agreement which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 10

<PAGE>   11

         20. No Waiver; Cumulative Remedies. The Pledgee shall not by any act,
delay, omission or otherwise be deemed to have waived any of its rights or
remedies hereunder and no waiver shall be valid unless in writing, signed by the
Pledgee, and then only to the extent therein set forth. A waiver by the Pledgee
of any right or remedy hereunder on any one occasion shall not be construed as a
bar to any right or remedy which Pledgee would otherwise have on any future
occasion. No failure to exercise nor any delay in exercising on the part of the
Pledgee, any right, power or privilege hereunder, shall operate as a waiver
thereof; nor shall any single or partial exercise of any right, power or
privilege hereunder preclude any other or further exercise thereof or the
exercise of any other right, power or privilege. The rights and remedies herein
provided are cumulative and may be exercised singly or concurrently, and are not
exclusive of any rights or remedies provided by law.

         21. Waivers, Amendments, Entirety. None of the terms or provisions of
this Agreement may be waived, altered, modified or amended except by an
instrument in writing, duly executed by the Pledgee. This Agreement and all
obligations of the Pledgor hereunder shall be binding upon the successors and
assigns of the Pledgor, and shall, together with the rights and remedies of
Pledgee hereunder, inure to the benefit of Pledgee and its successors and
assigns. THIS AGREEMENT REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES
HERETO AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR
SUBSEQUENT ORAL AGREEMENTS BY THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES.

         22. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND BE
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS
WITHOUT GIVING EFFECT TO THE CHOICE OF LAWS RULES THEREOF. THE CERTIFICATES
REPRESENTING THE PLEDGED STOCK SHALL BE DELIVERED TO PLEDGOR IN THE STATE OF
TEXAS.

         23. Counterparts. This Agreement may be executed in any number of
counterparts and by the different parties on separate counterparts and each such
counterpart shall be deemed to be an original, but all such counterparts shall
together constitute one and the same Agreement.

         24. Reinstatement. This Agreement shall remain in full force and effect
and continue to be effective should any petition be filed by or against the
Pledgor or Borrower for liquidation or reorganization, should the Pledgor or
Borrower become insolvent or make an assignment for the benefit of creditors or
should a receiver or trustee be appointed for all or any significant part of the
Pledgor's assets or the assets of Borrower and shall continue to be effective or
be reinstated, as the case may be, if at any time payment and performance of the
Obligations, or any part thereof is, pursuant to applicable law, rescinded or
reduced in amount, or must otherwise be restored or returned by any obligee of
the Obligations, whether as a "voidable preference", "fraudulent conveyance", or
otherwise, all as though such payment or performance had not been made. In the
event that any payment, or any part thereof, is rescinded, reduced, restored or
returned, the Obligations shall be reinstated and deemed reduced only by such
amount and not so rescinded, reduced, restored or returned.

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 11

<PAGE>   12

         25. Replacement of Prior Agreement. This Agreement is given in renewal,
amendment, replacement, and restatement in its entirety (but not in novation,
extinguishment or satisfaction) of that certain Pledge and Security Agreement
dated June 12, 1997, executed by Pledgor, formerly known as American Medical
Technologies, Inc. d/b/a AMT Industries, Inc., for the benefit of Pledgee,
successor-in-interest to Texas Commerce Bank National Association, as amended by
that certain First Amendment to Pledge and Security Agreement dated May 27,
1998, executed by and between Pledgor and Pledgee (as amended, the "Prior
Agreement"). To the extent of any conflict between the terms of this Agreement
and the terms of the Prior Agreement, the terms of this Agreement shall control.

         IN WITNESS WHEREOF, Pledgor has caused this Agreement to be duly
executed and delivered as of the day and year first above written.

                                        TIDEL TECHNOLOGIES, INC.

                                        By:
                                           ------------------------------------
                                              Mark K. Levenick,
                                              Chief Operating Officer

PLEDGE AND SECURITY AGREEMENT (TIDEL TECHNOLOGIES, INC.) - Page 12

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