Document:

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                                                                   Exhibit 10.18

                                    AGREEMENT

                  AGREEMENT made this 31st day of January, 2002, between Philip
Morris Companies Inc., a corporation organized and existing under the laws of
the Commonwealth of Virginia, hereinafter called the "Company," and Geoffrey C.
Bible, hereinafter called "Consultant."

                  WHEREAS, Consultant has been employed by the Company or its
affiliates continuously since 1976 and has served the Company as President and
Chief Executive Officer since June 1994 and Chairman and Chief Executive Officer
since February 1995 and has contributed significantly to the Company's success;
and

                  WHEREAS, the Company desires that Consultant continue to make
himself available following his retirement to consult with the Company and his
successor on various issues;

                  NOW, THEREFORE, in consideration of Consultant's significant
contributions to the success of the Company and the other agreements contained
herein, the parties hereto agree as follows:

1.       For the five-year period commencing with the date of Consultant's
         retirement from the Company (the "term hereof"), Consultant shall, at
         all reasonable times and insofar as his physical condition may permit,
         make himself available to the Company to consult with and advise its
         officers, directors and other representatives in connection with such
         matters as the then chief executive officer of the Company shall
         require. The Company will reimburse Consultant for his reasonable
         out-of-pocket expenses incurred in providing such services.

2.       For so long as Consultant shall maintain a residence within reasonable
         commuting distance of Greenwich, Connecticut, the Company shall provide
         Consultant at Company expense with an office at the location specified
         in Exhibit A or another comparable office in the Greenwich, Connecticut
         area, together with secretarial service and office furniture, supplies
         and equipment, including two phone lines, telephones and a fax machine,
         comparable to that to which he is currently accustomed. If Consultant
         shall cease to maintain a residence within reasonable commuting
         distance of Greenwich, Connecticut, the Company shall no longer be
         required to maintain such office, but in lieu thereof shall provide
         Consultant, if Consultant so requests, with a comparable office and
         secretarial service, furniture, supplies and equipment at a Company
         facility within a reasonable commuting distance of Consultant's new
         residence, subject to available space and the approval of the Company's
         chief executive officer. If there is no Company facility within a
         reasonable commuting distance of Consultant's new residence or if
         Consultant has requested office space at such a facility and the
         Company has not provided such space, the Company shall provide
         Consultant with an allowance of up to $190,000 a year for office space,
         furniture, supplies and equipment and in addition with comparable
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         secretarial service. The Company's obligations under this paragraph
         shall continue for Consultant's life.

3.       In addition to the Company's obligations to Consultant under paragraph
         2, the Company shall provide Consultant at Company expense with the
         following for his life or until Consultant no longer requires them:

         (a)      a telephone calling card;

         (b)      two cellular telephones, of Consultant's choosing, two
                  cellular telephone lines, and costs of maintenance; and two
                  home fax machines, of Consultant's choosing, fax telephone
                  lines, and costs of maintenance;

         (c)      the security arrangements in existence or their equivalent at
                  Consultant's current home and vacation home or at any other
                  two residences that Consultant may subsequently occupy;

         (d)      reasonable access to Company facilities, including dining
                  rooms and fitness centers, and use of Company aircraft subject
                  to availability of such aircraft and the approval of the
                  Company's chief executive officer;

         (e)      a Company car and driver; provided that if Consultant shall
                  cease to maintain a residence within reasonable commuting
                  distance of the Greenwich, Connecticut area, the Company shall
                  no longer be required to provide a car and driver, but in lieu
                  thereof shall provide Consultant, if Consultant so requests,
                  with an allowance of up to $100,000 per year for a car
                  service; and

         (f)      up to $15, 000 a year in financial counseling expenses.

4.       If at any time in the future Consultant is made a party or witness, or
         is threatened to be made a party or witness, to any action, suit or
         proceeding, whether civil, criminal, administrative or investigative (a
         "Proceeding") by reason of the fact that Consultant was a director,
         officer or employee of the Company (or any subsidiary or affiliate
         thereof) whether or not the basis for such proceedings is Consultant's
         alleged action in an official capacity while serving as a director,
         officer or employee, the Company agrees that Consultant shall be
         indemnified and held harmless by the Company to the fullest extent
         permitted or authorized by applicable law against all cost, expense,
         liability and loss (including, without limitation, attorney's fees,
         judgments, fines and amounts paid or to be paid in settlement)
         reasonably incurred or suffered by Consultant in connection therewith.
         Such indemnification will inure to the benefit of Consultant's heirs,
         executors and administrators. The Company shall also advance to
         Consultant all reasonable costs and expenses incurred by Consultant in
         connection with a Proceeding within 20 days after receipt by the
         Company of a written request for such advance as well as Consultant's
         written agreement to submit subsequent documentation of such costs.
         Such request shall include a written statement, executed personally, of
         Consultant's good faith belief that Consultant met any standard of
         conduct that is a prerequisite to Consultant's entitlement to
         indemnification under applicable law and a written undertaking by
         Consultant to repay
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         the amount of such advance if it shall ultimately be determined that
         Consultant did not meet such standard of conduct. This paragraph shall
         remain in full force and effect regardless of any other provision of
         this agreement, including paragraph 5 below.

5.       The Company and Consultant shall each inform the other in writing at
         least six months prior to the expiration of the consulting period
         specified in paragraph 1 and each extension thereof whether the party
         wishes to renew such consulting agreement and, thereafter, by mutual
         written agreement, such agreement may be renewed for additional terms
         and under conditions, as the parties shall agree. It is intended that a
         mutual determination of the continuation of Consultant's services
         desired by Consultant and the Company will determine the specifics
         relative to the length and terms of any further agreement between
         Consultant and the Company.

6.       In rendering services as a consultant as provided in paragraph 1,
         Consultant shall be an independent contractor.

7.       This agreement shall be binding upon and inure to the benefit of the
         parties hereto and any successors to the business of the Company, and
         the obligations of the Company, and any successor, to Consultant shall
         continue notwithstanding any change in control of the Company as such
         term is defined in the agreement dated February 1, 1995 between Company
         and Consultant. Neither this agreement nor any rights hereunder shall
         be assignable by Consultant.

8.       This agreement contains the entire understanding and agreement between
         the parties hereto with respect to the subject matter hereof, provided
         that the parties expressly acknowledge that this agreement does not
         pertain to any pension, health care or other benefits to which
         Consultant may otherwise be entitled as a retiree of the Company under
         other policies or agreements, except that the Company expressly agrees
         that the health care benefits to which Consultant and his spouse shall
         be entitled upon his retirement from the Company (or to the extent such
         health care benefits may later be increased) shall continue in effect
         for his life and the life of Consultant's spouse without reduction in
         the level of benefits or increase in the cost of such benefits to
         Consultant or Consultant's spouse. No representations have been made,
         except as herein set forth, and no change may be made in the terms and
         provisions hereof, except by an instrument in writing signed by the
         parties hereto.

If the foregoing conforms to your understanding, please sign and return the
enclosed counterpart of this letter, which will thereupon become a binding
agreement between us.

                                           PHILIP MORRIS COMPANIES INC.

                                           /s/ TIMOTHY A. SOMPOLSKI
                                           -------------------------------------
                                           Timothy A. Sompolski
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Accepted and agreed to:

/s/ GEOFFREY C. BIBLE                                March 18, 2002
----------------------------------                   ---------------------------
Geoffrey C. Bible                                    Date
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                                    EXHIBIT A

              Office space on the second level of the office building located at
One East Putnam Avenue in Greenwich, Connecticut<PAGE>
                                                                    EXHIBIT 10.1

NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF
THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
(THE "ACT"), AND MAY NOT BE SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR AN OPINION OF COUNSEL
SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

                     THE TRANSFERABILITY OF THIS WARRANT IS
                       RESTRICTED AS PROVIDED IN SECTION 2

No. __                                                         February 19, 2002

                           AUTHENTIDATE HOLDING CORP.
                          COMMON STOCK PURCHASE WARRANT

         For good and valuable consideration, the receipt of which is hereby
acknowledged by AUTHENTIDATE HOLDING CORP., a Delaware corporation (the
"Company"), ____________ is hereby granted the right to purchase, at any time
from August 19, 2002 until 5:00 P.M., New York City time, on October 1, 2004
(the "Warrant Exercise Term"), up to ______________________ (______) fully-paid
and non-assessable shares of the Company's Common Stock, $.00l par value per
share ("Common Stock").

         This Warrant is exercisable at a per share price of $2.00 (the
"Exercise Price"), subject to adjustment as provided in Section l hereof,
payable in cash or by certified or official bank check in New York Clearing
House funds. Upon surrender of this warrant certificate with the annexed
Subscription Form duly executed, together with payment of the Exercise Price for
the shares of Common Stock purchased at the Company's principal executive
offices (presently located at 2165 Technology Drive, Schenectady, New York
12308) the registered Holder of the Warrant ("Holder") shall be entitled to
receive a certificate or certificates for the shares of Common Stock so
purchased (the "Warrant Shares").

                  l.       Exercise of Warrant

                           1.1      The purchase rights represented by this
Warrant are exercisable at the option of the Holder hereof, in whole or in part
(but not as to fractional shares of the Common Stock) during any period in which
this Warrant may be exercised as set forth above. In the case of the purchase of
less than all the shares of Common Stock purchasable under this Warrant, the
Company shall cancel this Warrant upon the surrender thereof and shall execute
and deliver a new Warrant of
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like tenor for the balance of the shares of Common Stock purchasable hereunder.

                           1.2      The issuance of certificates for shares of
Common Stock upon the exercise of this Warrant shall be made without charge to
the Holder hereof including, without limitation, any tax which may be payable in
respect of the issuance thereof, and such certificates shall be issued in the
name of, or in such names as may be directed by, the Holder hereof; provided,
however, that the Company shall not be required to pay any tax which may be
payable in respect of any transfer involved in the issuance and delivery of such
certificate in a name other than that of the Holder and the Company shall not be
required to issue or deliver such certificates unless or until the person or
persons requesting the issuance thereof shall have paid to the Company the
amount of such tax or shall have established to the satisfaction of the Company
that such tax has been paid.

                           1.3      Stock Dividends, Subdivisions,
Reclassifications or Combinations. If the Corporation shall (A) declare a
dividend or make a distribution on its Common Stock in shares of its Common
Stock, (B) subdivide or reclassify the outstanding shares of Common Stock into a
greater number of shares, or (C) combine or reclassify the outstanding Common
Stock into a smaller number of shares, the Exercise Price in effect at the time
of the record date for such dividend or distribution or the effective date of
such subdivision, combination or reclassification shall be proportionately
adjusted so that the Holder after such date shall be entitled to receive the
number of shares of Common Stock which he would have owned or been entitled to
receive had this Warrant been exercised immediately prior to such date.
Successive adjustments in the Exercise Price shall be made whenever any event
specified above shall occur.

                           1.4      Consolidation, Merger, Sale or Conveyance.
In case of any consolidation or merger of the Company with any other corporation
(other than a wholly owned subsidiary), or in case of sale or transfer of all or
substantially all of the assets of the Company, or in the case of any share
exchange whereby the Common Stock is converted into other securities or
property, the Company will be required to make appropriate provision so that the
Holder will have the right thereafter to exercise this Warrant into the kind and
amount of shares of stock and other securities and property receivable upon such
consolidation, merger, sale, transfer or share exchange by a holder of the
number of shares of Common Stock for which this Warrant was exercisable
immediately prior to such consolidation, merger, sale, transfer or share
exchange.

                           1.5      The Company covenants that it will at all
times reserve and keep available out of its authorized Common Stock, solely for
the purpose of issuance upon exercise of this Warrant as herein provided, such
number of shares of Common Stock as shall then be issuable upon the exercise of
this Warrant. The Company covenants that all shares of Common Stock which shall
be so issuable shall be duly and validly issued and fully-paid and
non-assessable.

                           1.6      Cashless Exercise. At any time during the
Warrant Exercise Term, the Holder may, at its option, exchange the Warrants
represented by such Holder's Warrant Certificate, in whole or in part (a
"Warrant Exchange"), into the number of fully paid and non-

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assessable Warrant Shares determined in accordance with this Section 1.6, by
surrendering such Warrant Certificate at the principal office of the Company or
at the office of its transfer agent, accompanied by a notice stating such
Holder's intent to effect such exchange, the number of Warrants (the "Total
Share Number") to be exchanged and the date on which the Holder requests that
such Warrant Exchange occur (the "Notice of Exchange"). The Warrant Exchange
shall take place on the date specified in the Notice of Exchange, or, if later,
the date the Notice of Exchange is received by the Company (the "Exchange
Date"). Certificates for the Warrant Shares issuable upon such Warrant Exchange
and, if applicable, a new Warrant Certificate of like tenor evidencing the
balance of the Warrant Shares remaining subject to the Holder's Warrant
certificate, shall be issued as of the Exchange Date and delivered to the Holder
within three (3) days following the Exchange Date. In connection with any
Warrant Exchange, the Holder's Warrant certificate shall represent the right to
subscribe for and acquire (I) the number of Warrant Shares (rounded to the next
highest integer) equal to (A) the Total Share Number less (B) the number of
Warrant Shares equal to the quotient obtained by dividing (i) the product of the
Total Share Number and the then current Exercise Price per Warrant Share by (ii)
the current Market Price (as hereafter defined) of a share of Common Stock.

                  As used herein, the phrase "Market Price" at any date shall be
deemed to be the last reported sale price, or, in case no such reported sale
takes place on such day, the average of the last reported sale prices for the
preceding three trading days, in either case as officially reported by the
principal securities exchange on which the Common Stock is listed or admitted to
trading or as reported in the Nasdaq National Market System, or, if the Common
Stock is not listed or admitted to trading on any national securities exchange
or quoted on the Nasdaq National Market System, the last reported sale price as
furnished by the National Association of Securities Dealers, Inc. through Nasdaq
or similar organization if Nasdaq is no longer reporting such information, or if
the Common Stock is not quoted on Nasdaq, as determined in good faith by
resolution of the Board of Directors of the Company, based on the best
information available to it for the two days immediately preceding the Exchange
Date.

                  2.       Restrictions on Transfer

                  The Holder acknowledges that he has been advised by the
Company that this Warrant and the shares of Common Stock (the "Warrant Shares")
issuable upon exercise thereof (collectively the "Securities") have not been
registered under the Securities Act of 1933, as amended (the "Securities Act"),
that the Warrant is being issued, and the shares issuable upon exercise of the
Warrant will be issued, on the basis of the statutory exemption provided by
section 4(2) of the Securities Act relating to transactions by an issuer not
involving any public offering, and that the Company's reliance upon this
statutory exemption is based in part upon the representations made by the Holder
contained herein. The Holder acknowledges that he has been informed by the
Company of, or is otherwise familiar with, the nature of the limitations imposed
by the Securities Act and the rules and regulations thereunder on the transfer
of securities. In particular, the Holder agrees that no sale, assignment or
transfer of the Securities shall be valid or effective, and the Company shall

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not be required to give any effect to any such sale, assignment or transfer,
unless (i) the sale, assignment or transfer of the Securities is registered
under the Securities Act, and the Company has no obligations or intention to so
register the Securities except as may otherwise be provided herein, or (ii) the
Securities are sold, assigned or transferred in accordance with all the
requirements and limitations of Rule 144 under the Securities Act or such sale,
assignment, or transfer is otherwise exempt from registration under the
Securities Act. The Holder represents and warrants that he has acquired this
Warrant and will acquire the Securities for his own account for investment and
not with a view to the sale or distribution thereof or the granting of any
participation therein, and that he has no present intention of distributing or
selling to others any of such interest or granting any participation therein.
The Holder acknowledges that the securities shall bear the following legend:

         "These securities have not been registered under the Securities Act of
         1933. Such securities may not be sold or offered for sale, transferred,
         hypothecated or otherwise assigned in the absence of an effective
         registration statement with respect thereto under such Act or an
         opinion of counsel to the Company that an exemption from registration
         for such sale, offer, transfer, hypothecation or other assignment is
         available under such Act."

                  3.       Exchange and Replacement of Warrant Certificates.

                  This Warrant Certificate is exchangeable without expense, upon
the surrender hereof by the registered Holder at the principal executive office
of the Company, for a new Warrant Certificate of like tenor and date
representing in the aggregate the right to purchase the same number of Warrant
Shares in such denominations as shall be designated by the Holder thereof at the
time of such surrender.

                  Upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant
Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to it, and reimbursement to the Company of all
reasonable expenses incidental thereto, and upon surrender and cancellation of
the Warrants, if mutilated, the Company will make and deliver a new Warrant of
like tenor, in lieu thereof and any such lost, stolen, destroyed or mutilated
warrant shall thereupon become void.

                  4.       Elimination of Fractional Interests.

                  The Company shall not be required to issue certificates
representing fractions of the shares of Common Stock and shall not be required
to issue scrip or pay cash in lieu of fractional interests, it being the intent
of the parties that all fractional interests shall be eliminated by rounding any
fraction up or down to the nearest whole number of shares of Common Stock.

                  5.       Rights of Warrant Holders.

                                       4
<PAGE>
                  Nothing contained in this Agreement shall be construed as
conferring upon the Holder any rights whatsoever as a stockholder of the
Company, either at law or in equity, including without limitation, or Holders
the right to vote or to consent or to receive notice as a stockholder in respect
of any meetings of stockholders for the election of directors the right to
receive dividends or any other matter.

                  6.       Miscellaneous

                           6.l      All the covenants and agreements made by the
Company in this Warrant shall bind its successors and assigns.

                           6.2      No recourse shall be had for any claim based
hereon or otherwise in any manner in respect hereof, against any incorporator,
stockholder, officer or director, past, present or future, of the Company or of
any predecessor corporation, whether by virtue of any constitutional provision
or statute or rule of law, or by the enforcement of any assessment or penalty or
in any other manner, all such liability being expressly waived and released by
the acceptance hereof and as part of the consideration for the issue hereof.

                           6.3      No course of dealing between the Company and
the Holder hereof shall operate as a waiver of any right of any Holder hereof,
and no delay on the part of the Holder in exercising any right hereunder shall
so operate.

                           6.4      This Warrant may be amended only by a
written instrument executed by the Company and the Holder hereof. Any amendment
shall be endorsed upon this Warrant, and all future Holders shall be bound
thereby.

                           6.5      All communications provided for herein shall
be sent, except as may be otherwise specifically provided, by registered or
certified mail: if to the Holder of this Warrant, to the address shown on the
books of the Company; and if to the Company, to 2165 Technology Drive,
Schenectady, New York 12308, attention: Office of the President, or to such
other address as the Company may advise the Holder of this Warrant in writing.
Notices shall be deemed given when mailed.

                           6.6      The provisions of this Warrant shall in all
respects be constructed according to, and the rights and liabilities of the
parties hereto shall in all respects be governed by, the laws of the State of
New York. This Warrant shall be deemed a contract made under the laws of the
State of New York and the validity of this Warrant and all rights and
liabilities hereunder shall be determined under the laws of said State.

                           6.7      The headings of the Sections of this Warrant
are inserted for convenience only and shall not be deemed to constitute a part
of this Warrant.

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         IN WITNESS WHEREOF, AUTHENTIDATE HOLDING CORP. has caused this Warrant
to be executed in its corporate name by its officer, and its seal to be affixed
hereto.

Dated:   February 19, 2002
         Schenectady, New York

                                           AUTHENTIDATE HOLDING CORP.

                                           By:
                                              _____________________________
                                                    John T. Botti
                                                    President

ATTEST:

___________________________
Secretary

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<PAGE>
SUBSCRIPTION FORM

TO:      Authentidate Holding Corp.
         2165 Technology Drive
         Schenectady, New York 12308

         The undersigned Holder hereby irrevocably elects to exercise the right
to purchase shares of Common Stock covered by this Warrant according to the
conditions hereof and herewith makes full payment of the Exercise Price of such
shares.

         Kindly deliver to the undersigned a certificate representing the
Shares.

INSTRUCTIONS FOR DELIVERY

Name:  ____________________________________________________________
                  (please typewrite or print in block letters)

Address: __________________________________________________________

Tax I.D. No. or Social Security No.: ______________________________

Dated: _________________________

Signature ________________________________

STATE OF ___________)
COUNTY OF __________) ss:

         On this __ day of ___________, before me personally came ________, to
me known, who being by me duly sworn, did depose and say that he resides at
__________________, that he is the holder of the foregoing instrument and that
he executed such instrument and duly acknowledged to me that he executed the
same.

                                           _____________________________
                                           Notary Public

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                              [FORM OF ASSIGNMENT]

             (To be executed by the registered holder if such holder
                 desires to transfer the Warrant Certificate.)

         FOR VALUE RECEIVED __________________________ hereby sells, assigns and

transfers unto _________________________________________________________________

________________________________________________________________________________

                  (Please print name and address of transferee)

this Warrant Certificate, together with all right, title and interest therein,

and does hereby irrevocably constitute and appoint _________________ , Attorney,

to transfer the within Warrant Certificate on the books of AUTHENTIDATE HOLDING

CORP, with full power of substitution.

Dated: _________________________           Signature: __________________________

                                                ________________________________
                                                (Signature must conform in all
                                                respects to name of holder as
                                                specified on the face of the
                                                Warrant Certificate)

_______________________________________

_______________________________________
(Insert Social Security or Other
Identifying Number of Assignee)

STATE OF ___________)
COUNTY OF __________) ss:

         On this __ day of ___________, before me personally came ________, to
me known, who being by me duly sworn, did depose and say that he resides at
__________________, that he is the holder of the foregoing instrument and that
he executed such instrument and duly acknowledged to me that he executed the
same.

                                                _____________________________
                                                Notary Public

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