Document:

<PAGE>

                                                                    EXHIBIT 10.5

                       AMENDMENT TO SETTLEMENT AGREEMENT
                       ---------------------------------

     THIS AMENDMENT TO SETTLEMENT AGREEMENT ("the Amendment"), dated this 22nd
day of August, 2000, and deemed effective August 22, 2000, by, between, and
among LML PAYMENT SYSTEMS, INC. ("LML"), CHEQUEMARK HOLDINGS, INC. ("CHI"),
CHEQUEMARK PATENT, INC. ("CPI"), CHEQUEMARK, INC. ("Chequemark"), ROBERT R.
HILLS ("Mr. Hills"), and CHEQUEMARK TECHNOLOGIES CORPORATION n/k/a MARK
TECHNOLOGIES, INC. ("CTC").

                                  WITNESSETH:
                                  ----------

     WHEREAS, on or about March 11, 1998, pursuant to a "Patent Purchase
Agreement", CPI purchased U.S. Patent No. 5,484,988 ("the '988 Patent") relating
to the "Checkwriting Point-of-Sale System," ("the Checkwriting System") a
related patent application and related technology ("the Patent Estate") from Mr.
Hills and Henry R. Nichols ("Mr. Nichols"), ultimately in exchange for shares of
LML stock and future earn-out shares of LML stock; and

     WHEREAS, on or about March 11, 1998, pursuant to an "Asset Purchase
Agreement", Chequemark purchased the assets, including software, executable code
and source code relating to the Checkwriting System, of CTC ultimately in
exchange for shares of LML stock, and future earn-out shares of LML stock; and

     WHEREAS, on or about March 11, 1998, Mr. Hills entered into an "Employment
Agreement" with Chequemark in which he agreed to remain employed by Chequemark
for a period of one (1) year; and

     WHEREAS, to secure his one (1) year employment obligation, Mr. Hills
pledged the shares of LML stock he received pursuant to the Patent Purchase
Agreement and his portion of the shares of LML stock received by CTC under the
Asset Purchase Agreement; and

     WHEREAS, the LML Share Certificates representing the shares then pledged by
Mr. Hills were held in escrow by the law firm of Dinsmore & Shohl in Columbus,
Ohio,("the Escrowed Shares"); and

     WHEREAS, LML disputes Mr. Hills' and CTC's ownership of the Escrowed Shares
and maintains that Mr. Hills committed a "Unilateral Resignation" and that,
therefore, the LML Share Certificates belong to LML; and
<PAGE>

     WHEREAS, Mr. Hills, and CTC claim ownership of the Escrowed Shares, and
deny that Mr. Hills effected a "Unilateral Resignation"; and

     WHEREAS, on or about March 10, 1999, LML and CPI commenced an action in the
United States District Court for the Middle District of Florida styled LML
                                                                       ---
Payment Systems Inc., Chequemark Patent, Inc. and Chequemark Holdings, Inc., v.
-------------------------------------------------------------------------------
Robert R. Hills, Case No. 99-217 Civ-J-20A (the "Federal Court Action"), to
---------------
require Mr. Hills to execute an assignment of patent application Ser. No.
08/775,400, and

     WHEREAS, on or about July 17, 2000, the parties entered into a Settlement
Agreement in an effort to dispose of all claims and causes of action existing
between them, and

     WHEREAS, as part of the Settlement Agreement, Mr. Hills was required to
obtain a written release as well as other property from Global Technologies,
LLC, Airtime Technologies, Inc., and Dean S. Keil, and

     WHEREAS, Mr. Hills was not able to obtain the release and other property
from Global Technologies LLC, Airtime Technologies, Inc. and Dean S. Keil, as
required by the Settlement Agreement, and

                                       2
<PAGE>

     WHEREAS, the parties still desire to go forward with a settlement on the
following amended terms,

     NOW, THEREFORE, in consideration of the mutual promises and agreements of
each signatory set forth in this Amendment and other good and sufficient
consideration, the sufficiency of which is acknowledged by the parties hereto,
it is agreed by, between, and among LML, CPI, CHI, Chequemark, Mr. Hills, and
CTC that:

     1.   EXECUTION OF AFFIDAVIT BY MR. HILLS - Mr. Hills shall execute and
          -----------------------------------
deliver into escrow an affidavit in the form attached as Exhibit A to the
Amendment stating:  (i) Mr. Hills had no authority to execute the assignment of
U. S. Patent No. 5,484,988 ("the '988 Patent") from CPI to himself or any other
assignment of the '988 Patent (ii) that, since  March 11, 1998, Mr. Hills has
had no ownership interest or any other interest in the '988 Patent, and (iii)
that he informed Global Technologies, LLC,  Global Transaction Systems LLC
(collectively, "Global"), Airtime Technologies, Inc. ("Airtime"), and Dean S.
Keil ("Mr. Keil") that LML or one or more of its subsidiaries claimed ownership
of the '988 Patent.  No funds or stock shall be disbursed from escrow if Mr.
Hills does not deliver into escrow the affidavit in the form attached as Exhibit
A to this Amendment simultaneously with Mr. Hills' delivery into escrow of this
Amendment with his signature hereon.

     2.   DISCLOSURE OF SUBLICENSEES - Mr. Hills shall disclose, under oath, the
          --------------------------
name and business address of every person or business entity of which he is
aware to which Global, Airtime,  Mr. Keil or any related party, may have granted
or conveyed a license, marketing rights or any other right to use or promote all
or any portion of  the '988 Patent or the Checkwriting System. All persons and
entities to whom Global, Airtime or Mr. Keil (or any related person or entity)
may

                                       3
<PAGE>

have granted or conveyed a license, marketing rights, or any other right to use,
market or promote all or any portion of the '988 Patent or the Checkwriting
System shall be referred to collectively as "sublicensees" and individually as a
"sublicensee".

     3.   AGREEMENTS WITH GLOBAL, AIRTIME AND MR. KEIL - Mr. Hills shall deliver
          --------------------------------------------
into escrow any agreements, if any,  between himself and Global, Airtime, Mr.
Keil or any related party, regarding the purported assignment of the '988 Patent
or any royalties owed to Mr. Hills from the license, assignment or use of the
'988 Patent or the license or use of the Checkwriting System or software or
source code utilized as part of the Checkwriting System.

     4.   MODIFIED AGREED FINAL JUDGMENT AND PERMANENT INJUNCTION - Within five
          -------------------------------------------------------
(5) business days after the execution of this Amendment, the signatories to this
Amendment shall file in the Federal Court Action a Stipulation And Joint Motion
For Entry Of Agreed Final Judgment And Permanent Injunction (with attached
Agreed Final Judgment And Permanent Injunction) in the form attached as Exhibit
B to this Amendment. The signatories to this Amendment shall not appeal in any
way the Agreed Final Judgment And Permanent Injunction. If any signatory must
engage in legal action defending, enforcing or otherwise arising out of this
Amendment and/or the Agreed Final Judgment And Permanent Injunction, the
prevailing party or parties shall be entitled to its, his, or their attorneys'
fees, costs of investigation, and court costs (including all deposition costs)
for such action. The Amended Agreed Final Judgment shall supercede the final
judgment attached as Exhibit C to the Settlement Agreement.

     5.   COOPERATION - Mr. Hills shall cooperate with reasonable requests for
          -----------
information from LML, CPI, CHI or Chequemark in connection with (i) any
investigations conducted by LML, CPI, CHI or Chequemark  and (ii) any legal
proceedings involving LML, CPI, CHI or Chequemark

                                       4
<PAGE>

and Global, Airtime, Mr. Keil or one or more of their respective subsidiaries,
affiliates, relatives or sublicensees. Mr. Hills agrees to submit to LML in
written form all relevant facts of which he is aware regarding the use, sale,
transfer, marketing and promotion of the '988 Patent or the Checkwriting System
by Global, Airtime, Mr. Keil or any of their respective sublicensees. This
writing shall be submitted by Mr. Hills into escrow at the same time that he
submits this Amendment with his signature hereon into escrow, but under no
circumstances shall the release and disbursement to Mr. Hills of the funds and
stock currently held in escrow be delayed, hindered, canceled or prohibited
based on the content or sufficiency of said writing.

     6.   RETURN OF PORTION OF AMOUNT FROM ESCROW - Paragraph 7 of the
          ---------------------------------------
Settlement Agreement is amended to the extent that $350,000 (plus interest) of
the $2,500,000 (plus interest) held in escrow shall be delivered to LML within
one (1) business day of the effective date of this Amendment for the purpose of
pursuing or defending other legal claims regarding ownership, license or
infringement of the patent or intellectual property incorporated within the
Checkwriting System against persons other than Mr. Hills who claim rights
directly or indirectly from Mr. Hills. On August 21, 2005, provided that there
is no ongoing litigation, LML shall provide in writing to Mr. Hills at his last
known address a reasonable, non-privileged accounting of the litigation expenses
incurred as a result of such claims and shall refund to Mr. Hills that portion
of the $350,000.00 that remains unused as of August 21, 2005, for the
aforementioned litigation expenses. If litigation is ongoing as of August 21,
2005, LML shall provide the accounting and refund contemplated by this paragraph
within sixty (60) days of the termination of the litigation. The remaining
balance ($2,150,000) (plus interest) shall be delivered to Mr. Hills within one
(1) business day of the effective date of this Amendment.

     7.   MODIFICATION OF GENERAL RELEASE - The General Release, dated July
          -------------------------------
15,  2000,  executed by LML, CPI, CHI and Chequemark in favor of Mr. Hills
and CTC is modified to exclude claims by LML, CPI, CHI and Chequemark for
indemnification in the event that

                                       5
<PAGE>

Global, Airtime, Mr. Keil or one or more of their sublicensees brings an action
(including the assertion of one or more counterclaims) against LML or one or
more of its subsidiaries and obtains a monetary award against LML or one or more
of its subsidiaries. This indemnification provision does not apply to legal fees
incurred by LML or one or more of its subsidiaries in pursuit of claims brought
by LML or one or more of its subsidiaries against Global, Airtime, Mr. Keil or
one or more of their sublicensees or in defense of any claims brought by Global,
Airtime, Mr. Keil or any of their respective sublicensees. In the event of a
money and/or stock settlement whereby LML or one or more of its subsidiaries
agrees to pay money and/or give LML stock, LML shall give reasonable notice in
writing of all terms of the offer. Within five (5) business days of the date all
of the terms of the offer are communicated by LML to Mr. Hills in writing (to
his last known address), Mr. Hills shall communicate in writing to LML whether
he accepts and agrees with the offer. If within said time Mr. Hills communicates
in writing to LML that he agrees with and accepts the offer, then Mr. Hills
shall forward to LML a cashier's check and/or LML stock, as the case may be, in
the amount equal to the settlement amount. If within said time Mr. Hills
communicates in writing to LML that he does not accept and agree with one or
more of the terms of the offer, LML nonetheless may enter into the settlement
but in that event will have no right whatsoever to indemnification thereof from
Mr. Hills of any part of the settlement amount. If Mr. Hills does not provide a
written response to LML within five (5) business days of the date all of the
terms of the offer are communicated by LML to Mr. Hills in writing (to his last
known address), then Mr. Hills shall be deemed to have accepted and agreed with
the terms of the offer. In the event Mr. Hills accepts and agrees in writing
with the offer or fails to respond as described in the immediately preceding
sentence, then Mr. Hills shall indemnify LML and/or one or more of its
subsidiaries in full for the entire settlement amount. In the event LML

                                       6
<PAGE>

or one or more of its subsidiaries agrees to or is ordered to participate in
mediation with Global, Airtime, Mr. Keil or one or more of their sublicensees,
then Mr. Hills shall be given not less than ten (10) business days notice in
writing (to his last known address) of the time, date and location of the
mediation. During the mediation, Mr. Hills shall be entitled to attend the
mediation, with or without counsel, and shall be entitled to participate fully
in said mediation. The terms of this Paragraph shall apply to any settlement
reached during said mediation, except that in the event Mr. Hills fails to
attend said mediation after receiving the written notice of mediation required
by this Paragraph, Mr. Hills shall indemnify LML and/or one or more of its
subsidiaries in full for the entire settlement amount reached in mediation
notwithstanding a lack of acceptance and agreement by Mr. Hills.

     8.   RELEASE FROM CERTAIN OBLIGATIONS OF PARAGRAPH 9 OF SETTLEMENT
          -------------------------------------------------------------
AGREEMENT - Provided that Mr. Hills has delivered into escrow the executed
---------
Affidavit referenced in Paragraph 1, the writing setting forth the relevant
facts pursuant to Paragraph 5 and this Amendment executed by Mr. Hills, Mr.
Hills hereby is relieved of the obligations.  Mr. Hills is hereby relieved of
the obligations of acquiring a release from Global (attached as Exhibit E to the
Settlement Agreement) and of acquiring copies of any software, equipment or
other property from Global, Airtime, Mr. Keil or any of their respective
sublicensees.  Exhibit I to the Settlement Agreement shall be returned by the
Escrow Agent to Mr. Hills.

     9.   EXTENT OF AMENDMENT - Except as provided in this Amendment, all terms
          -------------------
of the Settlement Agreement shall remain in full force and effect.

     10.  COUNTERPARTS - This Amendment may be executed in six (6) counterparts,
          ------------
each of which shall be deemed an original but all of which together shall
constitute one and the same

                                       7
<PAGE>

Amendment. This Amendment shall be executed and delivered into escrow with
Terrence White by August 21, 2000. The effective date of this Agreement is
August 21, 2000. Time is of the essence.

Witnessed By:                                LML PAYMENT SYSTEMS, INC.

______________________                       By:  _____________________________
                                                  Its Authorized Officer
______________________

                                             CHEQUEMARK PATENT, INC.

______________________                       By:  _____________________________
                                                  Its President
______________________

                                             CHEQUEMARK HOLDINGS, INC.

______________________                       By:  _____________________________
                                                  Its President
______________________

                                             CHEQUEMARK, INC.

______________________                       By:  _____________________________
                                                  Its President
______________________

                                             MARK TECHNOLOGIES, INC.

______________________                       By:  _____________________________
                                                  Its President
______________________

                                       8
<PAGE>

______________________                       __________________________________
                                             Robert R. Hills
______________________

                                       9<PAGE>

                                                                     EXHIBIT 4.1

================================================================================

                         SECURITIES PURCHASE AGREEMENT

                                     Among

                                 BANCTEC, INC.

                                      and

                           THE SEVERAL PERSONS NAMED
                             IN SCHEDULE I HERETO

                        Dated as of September 22, 2000

================================================================================
<PAGE>

                                TABLE OF CONTENTS
                                                                            Page

I    PURCHASE AND SALE OF SECURITIES.........................................  1

     SECTION 1.01.  Issuance and Sale of the Series A Shares and Warrants
                    to the Purchasers........................................  1
     SECTION 1.02.  Closing Date.............................................  1

II.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY...........................  2

     SECTION 2.01.  Organization and Qualification...........................  2
     SECTION 2.02.  Authorization of Agreements, Etc.........................  2
     SECTION 2.03.  Validity.................................................  3
     SECTION 2.04.  Governmental Approvals...................................  3
     SECTION 2.05.  Brokers..................................................  3

III. REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS........................  3

     SECTION 3.01.  Authorization............................................  3
     SECTION 3.02.  Validity.................................................  4
     SECTION 3.03.  Investment Representations...............................  4
     SECTION 3.04.  Governmental Approvals...................................  5
     SECTION 3.05.  Brokers..................................................  5

IV.  COVENANTS...............................................................  5

     SECTION 4.01.  Conduct of the Company's Business........................  5
     SECTION 4.02.  Further Assurances.......................................  6

V.   CONDITIONS PRECEDENT....................................................  6

     SECTION 5.01.  Conditions Precedent to the Obligations of the Purchasers  6
     SECTION 5.02.  Conditions Precedent to the Obligations of the Company...  7

VI.  TERMINATION.............................................................  8

     SECTION 6.01.  Termination by the Parties...............................  8
     SECTION 6.02.  Effect of Termination....................................  8

VII. MISCELLANEOUS...........................................................  9

     SECTION 7.01.  Survival of Agreements...................................  9
     SECTION 7.02.  Parties in Interest; Assignment..........................  9
     SECTION 7.03.  Notices..................................................  9
     SECTION 7.04.  Entire Agreement......................................... 10
     SECTION 7.05.  Counterparts............................................. 10
     SECTION 7.06.  Headings................................................. 10

                                      -i-
<PAGE>

     SECTION 7.07.  Severability............................................. 10
     SECTION 7.08.  No Third Party Beneficiaries............................. 10
     SECTION 7.09.  Specific Performance..................................... 10
     SECTION 7.10.  Governing Law............................................ 10

Exhibit      Description
-------      -----------

 A           Form of Certificate of Designations, Preferences and Rights of the
             Series A Preferred Stock

 B           Form of Warrant

Schedule     Description
--------     -----------

 I           Purchasers

                                     -ii-
<PAGE>

               SECURITIES PURCHASE AGREEMENT, dated as of September 22, 2000,
          among BANCTEC, INC., a Delaware corporation (the "Company") and the
          several persons named in Schedule I hereto (each a "Purchaser" and
          collectively the "Purchasers").

          WHEREAS, the Company desires to sell to the Purchasers, and such
Purchasers desire to purchase from the Company, on the terms and subject to the
conditions set forth herein (i) an aggregate of 100,000 shares (the "Series A
Shares") of Series A Preferred Stock, par value $.01 per share, of the Company
("Preferred Stock"), having the terms set forth in the Certificate of
Designations, Preferences and Rights attached as Exhibit A hereto, and (ii)
warrants entitling the Purchasers to subscribe for an aggregate of 750,000
shares of Common Stock, par value $.01 per share, of the Company ("Common
Stock"), in the form attached as Exhibit B hereto (the "Warrants" and, together
with the Series A Shares, the "Securities").

          NOW, THEREFORE, in consideration of the premises and the mutual
covenants herein contained, the parties hereto agree as follows:

                                 I.

                        PURCHASE AND SALE OF SECURITIES

          SECTION 1.01.  Issuance and Sale of the Series A Shares and Warrants
                         -----------------------------------------------------
to the Purchasers.
-----------------

          (a) Subject to the terms and conditions set forth herein, on the
Closing Date (as hereinafter defined) the Company shall issue, sell and deliver
to the Purchasers, and each such Purchaser, acting severally and not jointly,
shall purchase from the Company, (i) the number of Series A Shares set forth
opposite the name of such Purchaser on Schedule I and (ii) warrants to subscribe
for the number of shares of Common Stock set forth opposite the name of such
Purchaser on Schedule I.  On the Closing Date, the Company shall (i) issue a
certificate or certificates in definitive form, registered in the name of each
Purchaser, representing the number of Series A Shares purchased by such
Purchaser, and (ii) execute and deliver the Warrant.

          (b) As payment in full for the Securities being purchased by it
hereunder, and against delivery of the certificate or certificates therefor as
aforesaid, on the Closing Date each Purchaser, acting severally and not jointly,
shall transfer, by wire transfer of immediately available funds to an account
designated by the Company, the amount set forth opposite the name of such
Purchaser on Schedule I under the heading "Aggregate Purchase Price."

          SECTION 1.02.  Closing Date.  The transfer, sale and delivery of the
                         ------------
Securities contemplated by Section 1.01 and 1.02 hereof (the "Closing") shall
take place at the offices of Reboul, MacMurray, Hewitt, Maynard & Kristol, 45
Rockefeller Plaza, New York, New York, as soon as practicable after the
satisfaction or waiver of each of the conditions to the obligations of the
parties set forth in Article V hereof, or at such date and time as may be
mutually agreed

                                       1
<PAGE>

upon among the parties hereto (such date and time of the Closing being herein
called the "Closing Date").

                                 II.

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

          The Company represents and warrants to the Purchasers as follows:

          SECTION 2.01.  Organization and Qualification.  The Company is a
                         ------------------------------
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has all requisite corporate power and authority to
own or lease and operate its properties and assets and to carry on its business
as it is now being conducted.  The Company is duly qualified as a foreign
corporation to do business, and is in good standing, in each jurisdiction in
which the character of its properties owned or leased or the nature of its
activities makes such qualification necessary, except where the failure to be so
qualified would not have a material adverse effect on the properties, assets,
financial condition, prospects, operating results or business of the Company and
its subsidiaries, taken as a whole (a "Material Adverse Effect").

          (a) On the date hereof, the authorized capital stock of the Company
consists of (i) 30,000,000 shares of Common Stock, (ii) 2,000,000 shares of
Class A Common Stock, and (iii) 1,000,000 shares of Preferred Stock.  As of the
Closing Date, the outstanding capital stock of the Company will consist of (i)
18,185,784 shares of Common Stock, (ii) 1,181,946 shares of Class A Common
Stock, and (iii) 100,000 shares of the Series A Shares, which will have the
rights and other terms set forth in the Certificate of Designations, Preferences
and Rights attached hereto as Exhibit B.

          (b) Except as set forth in paragraph (a) above and pursuant to the
Stockholders Agreement (the "Stockholders Agreement"), dated as of July 22,
1999, by and among the Company and the other signatories thereto, immediately
after the Closing the Company will have outstanding no shares of capital stock
or securities convertible into or exchange or exercisable for capital stock, or
any rights or options for the purchase of, or any agreement providing for the
issuance (contingent or otherwise) of, or any calls, commitments or claims of
any character relating to, any capital stock or securities convertible into or
exchangeable or exercisable for capital stock.  Immediately after the Closing,
the Company will not be subject to any obligations (contingent or otherwise) to
repurchase or otherwise acquire or retire any shares of capital stock or
securities, rights, options or other instruments of the type described in the
preceding sentence.

          SECTION 2.02.  Authorization of Agreements, Etc.
                         --------------------------------

          (a) Each of (i) the execution and delivery by the Company of this
Agreement (ii) the performance by the Company of its obligations hereunder and
thereunder; (iii) the issuance, sale and delivery by the Company of the Series A
Shares; (iv) the issuance, sale and delivery by the Company of the Warrant; and
(v) the performance by the Company of the

                                       2
<PAGE>

transactions contemplated hereby has been duly authorized by all requisite
corporate action and will not (x) violate any provision of law, any order of any
court or other agency of government, the Certificate of Incorporation or By-laws
of the Company, or any provision of any indenture, agreement or other instrument
to which the Company or any of its properties or assets is bound; (y) conflict
with, result in a breach of or constitute (with due notice or lapse of time or
both) a default under any such indenture, agreement or other instrument; or (z)
result in the creation or imposition of any lien, charge, encumbrance, security
interest or other similar claim (any of the foregoing, a "Claim") in favor of
any third person upon any of the assets of the Company or any of the Shares.

          (b) The Securities have been duly authorized by the Company and, when
sold and paid for in accordance with this Agreement, will be validly issued,
fully paid and nonassessable, free of all Claims.  Except as set forth in the
Stockholders Agreement, the issuance, sale and delivery of the Securities to the
Purchasers hereunder are not subject to any preemptive rights of stockholders of
the Company or to any right of first refusal or other similar right in favor of
any person.

          SECTION 2.03.  Validity.  This Agreement has been duly executed and
                         --------
delivered by the Company and constitutes the legal, valid and binding obligation
of the Company, enforceable against the Company in accordance with its terms.
The Warrant, when executed and delivered by the Company as provided in this
Agreement, will constitute the legal, valid and binding obligation of the
Company, enforceable against the Company in accordance with its terms.

          SECTION 2.04.  Governmental Approvals.  Assuming the accuracy of the
                         ----------------------
representations and warranties of the Purchasers set forth in Article III
hereof, no registration or filing with, or consent or approval of, or other
action by, any Federal, state or other governmental agency or instrumentality is
or will be necessary by the Company for the valid execution, delivery and
performance of this Agreement, the issuance, sale and delivery by the Company of
the Securities or the consummation of the transactions contemplated hereby.

          SECTION 2.05.  Brokers  All negotiations relative to this Agreement
                         -------
and the transactions contemplated hereby have been carried on without the
intervention of any person on behalf of the Company in such manner as to give
rise to any valid claim by such person against the Purchasers for a finder's
fee, brokerage commission or similar payment.

                                 III.

               REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS

          Each Purchaser, severally and not jointly, represents and warrants to
the Company and to the other Purchasers as follows:

          SECTION 3.01.  Authorization.  The execution, delivery and performance
                         -------------
by such Purchaser of this Agreement, and the purchase and receipt by such
Purchaser of the

                                       3
<PAGE>

Securities being acquired by it hereunder, have been duly authorized by all
requisite action on the part of such Purchaser, and will not (x) violate any
provision of law, any order of any court or other agency of government, the
charter or other governing documents of such Purchaser, or any provision of any
indenture, agreement or other instrument by which such Purchaser or any of such
Purchaser's properties or assets are bound; (y) conflict with, result in a
breach of or constitute (with due notice or lapse of time or both) a default
under any such indenture, agreement or other instrument; or (z) result in any
Claim upon any of the properties or assets of such Purchaser.

          SECTION 3.02.  Validity.  This Agreement has been duly executed and
                         --------
delivered by such Purchaser and constitutes the legal, valid and binding
obligation of such Purchaser, enforceable against such Purchaser in accordance
with its terms.

          SECTION 3.03.  Investment Representations.  For purposes of this
                         --------------------------
Section 3.03, the term "such Purchaser" shall be deemed to include such
Purchaser and its partners, in the case of a Purchaser that is a limited
partnership that has been formed solely for the purpose of purchasing the
Securities.

          (a)  Such Purchaser is acquiring the Securities being purchased by
such Purchaser hereunder for such Purchaser's own account, for investment, and
not with a view toward the resale or distribution thereof.

          (b) Such Purchaser understands that he, she or it, as the case may be,
must bear the economic risk of such Purchaser's investment for an indefinite
period of time because the Securities are not registered under the Securities
Act of 1933, as amended (the "Securities Act"), or any applicable state
securities laws, and may not be resold unless subsequently registered under the
Securities Act and such other laws or unless an exemption from such registration
is available.  Such Purchaser also understands that, except as provided in the
Registration Rights Agreement (the "Registration Rights Agreement"), dated as of
July 22, 1999, among the Company and the other parties signatory thereto, it is
not contemplated that any registration will be made under the Securities Act or
that the Company will take steps which will make the provisions of Rule 144
under the Securities Act available to permit resale of the Securities.  Such
Purchaser agrees not to pledge, transfer, convey or otherwise dispose of any of
the Securities (including any shares of Common Stock to which such Purchaser is
entitled to purchase pursuant to the Warrant), except in a transaction that (A)
is permitted under the Stockholders Agreement and (B) is the subject of either
(i) an effective registration statement under the Securities Act and any
applicable state securities laws, or (ii) an applicable exemption from the
Securities Act and any applicable state securities laws as confirmed, if
reasonably requested by the Company, by an opinion of counsel to the effect that
such registration is not required (which opinion and counsel shall be reasonably
satisfactory to the Company), it being intended that the agreements with respect
to the Securities contained in this sentence shall be construed consistently
with the provisions relating to the same subject matter contained in the
Registration Rights Agreement (provided that the provisions of the Registration
Rights Agreement shall govern in the event of any conflict with the terms of
this sentence).

                                       4
<PAGE>

          (c) Such Purchaser has the ability to bear the economic risks of the
investment in the Securities being purchased hereunder for an indefinite period
of time.  Such Purchaser further acknowledges that he, she or it, as the case
may be, has had the opportunity to ask questions of, and receive answers from,
officers of the Company with respect to the business and financial condition of
the Company and the terms and conditions of the offering of the Securities and
to obtain additional information necessary to verify such information or can
acquire it without unreasonable effort or expense.

          (d) Such Purchaser has such knowledge and experience in financial and
business matters that such Purchaser is capable of evaluating the merits and
risks of its investment in the Securities.  Such Purchaser further represents
that he, she or it, as the case may be, is an "accredited investor" as such term
is defined in Rule 501 of Regulation D under the Securities Act with respect to
its purchase of the Securities.

          (e) If such Purchaser is a limited partnership or limited liability
company, such Purchaser represents that it has been organized and is existing as
a limited partnership or limited liability company under the laws of its
jurisdiction of organization.

          SECTION 3.04.  Governmental Approvals.  No registration or filing
                         ----------------------
with, or consent or approval of, or other action by, any Federal, state or other
governmental agency or instrumentality is or will be necessary by any Purchaser
for the valid execution, delivery and performance of this Agreement.

          SECTION 3.05.  Brokers.  All negotiations relative to this Agreement
                         -------
and the transactions contemplated hereby have been carried on by such Purchaser
without the intervention of any person on behalf of such Purchaser in such
manner as to give rise to any valid claim by such person against the Company or
the other Purchasers for a finder's fee, brokerage commission or similar
payment.

                                      IV.

                                   COVENANTS

          SECTION 4.01.  Conduct of the Company's Business.  The Company agrees
                         ---------------------------------
that, between the date hereof and the Closing Date, it shall not (i) issue,
sell, pledge or dispose of, or agree to issue, sell, pledge or dispose of, any
shares of, or securities convertible or exchangeable for, or any options,
warrants or rights of any kind to acquire any shares of, its capital stock of
any class, except as provided herein; (ii) acquire (by merger, consolidation or
acquisition of stock or assets) any corporation, partnership or other business
organization or division thereof (except an existing wholly-owned subsidiary) or
any material amount of assets; (iii) incur or guarantee any indebtedness for
borrowed money or refinance any such indebtedness or issue or sell any debt
securities; (iv) enter into or modify any material contract, lease, agreement or
commitment, or permit or perform any act that would cause a material breach of
any such contract, lease, agreement or commitment; (v) make any loans, advances
or capital contributions to or investments in, any other person; or (vi) violate
or fail to perform in any material respect any

                                       5
<PAGE>

obligation imposed upon the Company or any of its subsidiaries by any applicable
laws, orders, decrees, ordinances, government rules or regulations.

          SECTION 4.02.  Further Assurances.  Subject to the terms and
                         ------------------
conditions herein provided, each of the parties hereto agrees to use its
reasonable best efforts to take, or cause to be taken, all action and to do, or
cause to be done, all things necessary, proper or advisable to consummate and
make effective as promptly as practicable the transactions contemplated by this
Agreement, including, without limitation, using all reasonable efforts to obtain
all necessary waivers, consents and approvals and to effect all necessary
registrations and filings.  Without limiting the foregoing, between the date
hereof and the Closing Date the Company shall take such actions as may be
necessary to increase its authorized but unissued capital stock to allow it to
issue the Warrant.

                                      V.

                             CONDITIONS PRECEDENT

          SECTION 5.01.  Conditions Precedent to the Obligations of the
                         ----------------------------------------------
Purchasers.  The obligations of each Purchaser hereunder are subject to the
----------
satisfaction or waiver by such Purchaser, on or before the Closing Date, of the
following conditions:

          (a) Representations and Warranties to Be True and Correct.  The
              -----------------------------------------------------
representations and warranties of the Company contained in this Agreement shall
be true and correct in all material respects on the Closing Date, with the same
force and effect as though such representations and warranties had been made on
and as of such date, and the Company shall have so certified to the Purchasers
in writing.

          (b) Performance.  The Company shall have performed and complied in all
              -----------
material respects with all agreements and conditions contained herein required
to be performed or complied with by it prior to or on the Closing Date, and the
Company shall have so certified to the Purchasers in writing.

          (c) Amendment to Credit Agreement.  The Third Amendment dated as of
              -----------------------------
September 15, 2000, to the Credit Agreement dated as of July 22, 1999, between
BancTec, Inc., the lenders party thereto, The Chase Manhattan Bank, as
administrative agent, and ABN AMRO Bank N.V., as co-agent, shall have been
executed and delivered by the parties thereto and shall have become effective in
accordance with its terms.

          (d) All Proceedings to Be Satisfactory.  All corporate and other
              ----------------------------------
proceedings to be taken by the Company and all waivers and consents to be
obtained by the Company in connection with the transactions contemplated hereby
shall have been taken or obtained by the Company and all documents incident
thereto shall be satisfactory in form and substance to the Purchasers and their
counsel.

                                       6
<PAGE>

          (e) Supporting Documents.  On or prior to the Closing Date the
              --------------------
Purchasers and their counsel shall have received copies of the following
supporting documents:

          (i) copies of (1) the Certificate of Incorporation of the Company and
     all amendments thereto (including the Certificate of Designations,
     Preferences and Rights of the Preferred Stock), certified as of a recent
     date by the Secretary of State of the State of Delaware, and (2) a
     certificate of said Secretary, dated as of a recent date, as to the due
     incorporation and good standing of the Company, and listing all documents
     relating to the Company on file with said official; and

          (ii) a certificate of the Secretary or an Assistant Secretary of the
     Company, dated the Closing Date and certifying (1) that attached thereto is
     a true and complete copy of the By-laws of the Company as in effect on the
     date of such certification; (2) that attached thereto is a true and
     complete copy of resolutions adopted by the Board of Directors of the
     Company authorizing the execution, delivery and performance of this
     Agreement and the issuance, sale and delivery of the Securities, and that
     all such resolutions are still in full force and effect and are all the
     resolutions adopted in connection with the transactions contemplated by
     this Agreement; (3) that the Certificate of Incorporation of the Company
     has not been amended since the date of the last amendment referred to in
     the certificate delivered pursuant to clause (i)(2) above; and (4) as to
     the incumbency and specimen signature of each officer of the Company
     executing this Agreement, the stock certificates representing the Preferred
     Stock, the Warrant and any certificate or instrument furnished pursuant
     hereto, and a certification by another officer of the Company as to the
     incumbency and signature of the officer signing the certificate referred to
     in this paragraph (ii).

     All such documents shall be satisfactory in form and substance to the
Purchasers and their counsel.

          (f) Legal Proceedings.  No preliminary or permanent injunction or
              -----------------
other order, decree or ruling issued by any court of competent jurisdiction nor
any statute, rule, regulation or order entered, promulgated or enacted by any
governmental, regulatory or administrative agency or authority, or national
securities exchange shall be in effect that would prevent the consummation of
the transactions contemplated by this Agreement.

          SECTION 5.02.  Conditions Precedent to the Obligations of the Company.
                         ------------------------------------------------------
The obligations of the Company hereunder are, at its option, subject to the
satisfaction, on or before the Closing Date, of the following conditions:

          (a) Representations and Warranties to Be True and Correct.  The
              -----------------------------------------------------
representations and warranties of the Purchasers contained in this Agreement
shall be true and correct in all material respects on the Closing Date, with the
same effect as though such representations and warranties had been made on and
as of such date.

                                       7
<PAGE>

          (b) Performance.  The Purchasers shall have performed and complied in
              -----------
all material respects with all agreements and conditions contained herein
required to be performed or complied with by them prior to or on the Closing
Date.

          (c) All Proceedings to Be Satisfactory.  All proceedings to be taken
              ----------------------------------
by the Purchasers and all waivers and consents to be obtained by the Purchasers
in connection with the transactions contemplated hereby shall have been taken or
obtained by the Purchasers and all documents incident thereto shall be
satisfactory in form and substance to the Company and its counsel.

          (d) Legal Proceedings.  No preliminary or permanent injunction or
              -----------------
other order, decree or ruling issued by any court of competent jurisdiction nor
any statute, rule, regulation or order entered, promulgated or enacted by any
governmental, regulatory or administrative agency or authority, or national
securities exchange shall be in effect that would prevent the consummation of
the transactions contemplated by this Agreement.

                                      VI.

                                  TERMINATION

          SECTION 6.01.  Termination by the Parties.  This Agreement may be
                         --------------------------
terminated and the transactions contemplated hereby may be abandoned at any time
prior to the Closing Date:

          (a) by mutual consent of the Purchasers and the Company; or

          (b) by the Company or by a majority in interest of the Purchasers
(determined on the basis of amounts to be invested in the Company pursuant to
this Agreement), if the transactions contemplated hereby have not been
consummated before October 31, 2000, unless the failure to consummate such
transactions results from a breach of any representation, warranty or covenant
of the party seeking to terminate this Agreement;

provided that the provisions of Article VII shall survive any such termination.
--------

          SECTION 6.02.  Effect of Termination.  In the event of the termination
                         ---------------------
of this Agreement and the abandonment of the transactions contemplated hereby
pursuant to this Article VI, this Agreement shall thereafter become void and
have no effect, and no party hereto shall have any liability to any other party
hereto, except that nothing shall relieve any party from liability for any
breach of this Agreement.

                                       8
<PAGE>

                                      VII.

                                 MISCELLANEOUS

          SECTION 7.01.  Survival of Agreements.  All covenants, agreements,
                         ----------------------
representations and warranties made herein shall survive the execution and
delivery of this Agreement and the issuance, sale and delivery of the Securities
pursuant hereto, notwithstanding any investigation made at any time by or on
behalf of any party hereto.  All statements contained in any certificate or
other instrument delivered by the Company hereunder shall be deemed to
constitute representations and warranties made by the Company.

          SECTION 7.02.  Parties in Interest; Assignment.  Subject to Section
                         -------------------------------
3.03(b), all covenants and agreements contained in this Agreement by or on
behalf of any party hereto shall bind and inure to the benefit of the respective
successors and assigns of such party hereto whether so expressed or not,
provided that this Agreement shall not be assigned by operation of law or
otherwise without the consent of the other parties.

          SECTION 7.03.  Notices.  Any notice or other communications required
                         -------
or permitted hereunder shall be deemed to be sufficient if contained in a
written instrument delivered in person or duly sent by first class certified
mail, postage prepaid, by nationally recognized overnight courier, or by
telecopy addressed to such party at the address or telecopy number set forth
below or such other address or telecopy number as may hereafter be designated in
writing by the addressee to the addressor listing all parties:

     if to the Company, to:

          BancTec, Inc.
          2701 East Grauwyler Road
          Irving, TX  75061
          Attention: President
          Facsimile: (972) 579-6448

     with a copy to:

          Reboul, MacMurray, Hewitt, Maynard & Kristol
          45 Rockefeller Plaza
          New York, New York  10111
          Telecopy Number:  (212) 841-5725
          Attention: Steven Rutkovsky, Esq.;

     if to any Purchaser, to it at its address set forth on Schedule I;

or, in any case, at such other address or addresses as shall have been furnished
in writing by such party to the other parties hereto.  All such notices,
requests, consents and other communications shall be deemed to have been
received (a) in the case of personal delivery, on the date of such delivery, (b)
in the case of mailing, on the fifth business day following the date of such
mailing,

                                       9
<PAGE>

(c) in the case of delivery by overnight courier, on the business day following
the date of delivery to such courier, and (d) in the case of telecopy, when
received.

          SECTION 7.04.  Entire Agreement.  This Agreement (including the
                         ----------------
Schedules and Exhibits hereto) constitutes the entire agreement of the parties
with respect to the subject matter hereof and supersedes all prior agreements
and understandings among the parties hereto with respect to the subject matter
hereof and may not be amended or modified except in a writing signed by the
Company and a majority in interest (determined on the basis of amounts to be
invested in the Company pursuant to this Agreement) of the Purchasers.  Any
waiver of any provision of this Agreement must be in a writing signed by the
party against whom enforcement of such waiver is sought.

          SECTION 7.05.  Counterparts.  This Agreement may be executed in two or
                         ------------
more counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

          SECTION 7.06.  Headings.  Headings and section reference numbers in
                         --------
this Agreement are for reference purposes only and shall not in any way affect
the meaning or interpretation of this Agreement.

          SECTION 7.07.  Severability.  In the event that any one or more of the
                         ------------
provisions set forth herein shall, for any reason, be held to be invalid,
illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Agreement.

          SECTION 7.08.  No Third Party Beneficiaries.  This Agreement is not
                         ----------------------------
intended to confer any rights or remedies upon any person other than the parties
hereto.

          SECTION 7.09.  Specific Performance.  Each party hereto agrees that a
                         --------------------
remedy at law for any breach or threatened breach by such party of this
Agreement would be inadequate and therefore agrees that any other party hereto
shall be entitled to specific performance of this Agreement in addition to any
other available rights and remedies in case of any such breach or threatened
breach.

          SECTION 7.10.  Governing Law.  This Agreement shall be governed by and
                         -------------
construed in accordance with the laws of the State of Delaware.

                                      10
<PAGE>

          IN WITNESS WHEREOF, the Company and the Purchasers have executed this
Agreement as of the day and year first above written.

                         BANCTEC, INC.

                         By /s/John D. Staedke
                           --------------------------------------------
                         Name:  John D. Staedke
                         Title:  President and Chief Executive Officer

                         WELSH, CARSON, ANDERSON & STOWE VIII, L.P.
                         By WCAS VIII Associates, L.L.C., General Partner

                         By /s/Jonathan Rather
                           --------------------------------------------
                         Name:  Jonathan Rather
                         Title:   Managing Member

                         WCAS CAPITAL PARTNERS III, L.P.
                         By WCAS CP III Associates, L.L.C., General Partner

                         By /s/Jonathan Rather
                           --------------------------------------------
                         Name:  Jonathan Rather
                         Title:   Managing Member

                         WCAS INFORMATION PARTNERS, L.P.

                         By /s/Jonathan Rather
                           --------------------------------------------
                         Name:  Jonathan Rather
                         Title:  Attorney-In-Fact

                                      11
<PAGE>

                         Patrick J. Welsh
                         Russell L. Carson
                         Bruce K. Anderson
                         Andrew M. Paul
                         Thomas E. McInerney
                         Laura M. VanBuren
                         Robert A. Minicucci
                         Anthony J. de Nicola
                         Paul B. Queally
                         Jonathan Rather
                         Lawrence B. Sorrel
                         Priscilla A. Newman
                         Rudolph E. Rupert
                         D. Scott Mackesy

                         By /s/Jonathan Rather
                           --------------------------------------------
                              Jonathan Rather
                              Individually and
                              as Attorney-in-Fact

                         /s/Jonathan Rather
                         ----------------------------------------------
                              John Almeida    Jonathan Rather
                                              Attorney-In-Fact

                         /s/Jonathan Rather
                         ----------------------------------------------
                              Sean Traynor    Jonathan Rather
                                              Attorney-In-Fact

                                      12
<PAGE>

                                   SCHEDULE I

                                   PURCHASERS
                                   ----------

<TABLE>
<CAPTION>
                                                    Number of              Number of             Aggregate
                                                     Series A              Shares of              Purchase
Name and Address of Purchaser                         Shares             Common Stock              Price
---------------------------------------------    --------------      -------------------      --------------
<S>                                                <C>                 <C>                      <C>
Welsh, Carson, Anderson & Stowe VIII, L.P.               94,880                  735,600          14,232,000
WCAS Information Partners, L.P.                             373                    1,050              55,950
Patrick J. Welsh                                            834                    2,340             125,100
Russell L. Carson                                           834                    2,340             125,100
Bruce K. Anderson                                           834                    2,340             125,100
Andrew M. Paul                                              633                    1,780              94,950
Thomas E. McInerney                                         833                    2,340             124,950
Robert A. Minicucci                                         373                    1,050              55,950
Anthony J. de Nicola                                         93                      260              13,950
Paul B. Queally                                              73                      210              10,950
Lawrence B. Sorrel                                           73                      210              10,950
Rudolph E. Rupert                                            53                      160               7,950
D. Scott Mackesy                                             40                      100               6,000
Priscilla A. Newman                                          27                       70               4,050
Laura M. VanBuren                                             7                       30               1,050
Sean Traynor                                                  7                       30               1,050
John Almeida                                                 13                       40               1,950
Jonathan Rather                                              20                       50               3,000
---------------------------------------------    --------------      -------------------      --------------

Total                                                   100,000                  750,000         $15,000,000

c/o Welsh, Carson, Anderson & Stowe
320 Park Avenue, Suite 2500
New York, New York 10022
Telecopy: (212) 893-9563
Attention: Robert A. Minicucci
</TABLE>

                                      13
<PAGE>

 Exhibit A - Form of Certificate of Designations, Preferences and Rights of the
                            Series A Preferred Stock

                                      14
<PAGE>

                 Exhibit B - Form of Stock Subscription Warrant

                                      15

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