NOVA CORP \GA\
8-K, 1997-11-14
MISCELLANEOUS BUSINESS SERVICES
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549
                                        

                                    FORM 8-K
                                        
               CURRENT REPORT PURSUANT TO SECTION 13 OF 15(D) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
                                        
      DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED):  OCTOBER 31, 1997
                                        

                                NOVA CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                                        
        Georgia                      1-14342                   58-2209575
- -------------------------------------------------------------------------------
(State or other jurisdiction     (Commission File            (I.R.S. Employer
of incorporation or              Number)                     Identification No.)
organization

                             One Concourse Parkway
                                   Suite 300
                               Atlanta, GA  30328
- -------------------------------------------------------------------------------
                    (Address of principal executive offices)

      Registrant's telephone number, including area code:  (770) 396-1456
                                                          ---------------

- -------------------------------------------------------------------------------
         (Former name or former address, if changed since last report)
<PAGE>
 
Item 2.  Acquisition or Disposition of Assets.

     On October 31, 1997, NOVA Information Systems, Inc. ("NOVA"), a wholly-
owned subsidiary of NOVA Corporation, and Firstar Bank, U.S.A., N.A. ("Firstar")
and Firstar Bank Milwaukee, N.A. ("Firstar Milwaukee"), each of which is a
wholly-owned subsidiary of Firstar Corporation, consummated the transactions
contemplated by an Agreement Respecting a Limited Liability Company dated
October 7, 1997 by and among NOVA, Firstar and Firstar Milwaukee (the
"Agreement").  Pursuant to the Agreement, NOVA and Firstar jointly own and
operate a newly created limited liability company called Elan Merchant Services,
LLC (the "LLC") which engages in the business of bank card payment processing.
In connection with this transaction, Firstar, Firstar Milwaukee and each of the
other banking affiliates of Firstar Corporation contributed substantially all of
their existing bank card payment processing contracts (representing
approximately $3.0 billion in annualized credit and debit card volume) to the
LLC in return for a 49% interest in the LLC, and NOVA paid to Firstar and
Firstar Milwaukee an aggregate of $23.75 million in return for a 51% interest in
the LLC.  The purchase price paid by NOVA was determined through arms-length
negotiations between NOVA and Firstar.  The source of funds for the acquisition
was NOVA's cash on hand combined with $3.0 million in borrowings under NOVA's
credit facility with Bank of America.  NOVA will, among other things, manage the
business and operations of the LLC on a day-to-day basis and provide payment
processing services to the LLC.  Firstar will provide marketing and other
related services to the LLC.

Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits

     (a)  Financial Statements of Business Acquired.  In accordance with Item
7(b)(2) of Form 8-K, any financial statements of the LLC required to be filed
with the Commission will be filed as an amendment to this report under cover of
Form 8-K/A on or before January 14, 1998.

     (b)  Pro Forma Financial Information.  In accordance with Item 7(b)(2) of
Form 8-K, any pro forma financial information required to be filed with the
Commission will be filed as an amendment to this report under cover of Form 8-
K/A on or before January 14, 1998.

     (c)  Exhibits

          Exhibit 99.1  -  Agreement Respecting a Limited Liability Company
          dated October 7, 1997, by and among NOVA Information Systems, Inc.,
          Firstar Bank U.S.A., N.A. d/b/a Elan Financial Services and Firstar
          Bank Milwaukee, N.A.

          Exhibit 99.2  -  Press Release dated October 8, 1997
<PAGE>
 
                                   SIGNATURES
                                        
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       NOVA Corporation


                                       By: /s/ Edward Grzedzinski
                                           --------------------------------- 
                                           Edward Grzedzinski
November 14, 1997                          Chief Executive Officer

<PAGE>
 
                                                                   EXHIBIT 99.1


               AGREEMENT RESPECTING A LIMITED LIABILITY COMPANY

     This Agreement is made as of this 7th day of October 1997, by and among
FIRSTAR BANK U.S.A., N.A. D/B/A ELAN FINANCIAL SERVICES, a national bank with
its main office located in Waukegan, Illinois ("Elan"), FIRSTAR BANK MILWAUKEE,
N.A., a national banking association with its main office located in Milwaukee,
Wisconsin ("Firstar Milwaukee"), and NOVA INFORMATION SYSTEMS, INC., a
corporation chartered under the laws of the State of Georgia with its main
office located in Atlanta, Georgia ("NOVA").  For purposes of this Agreement,
capitalized terms used herein, unless otherwise defined herein, shall have the
meaning ascribed to such terms in the Definitional Supplement attached hereto as
EXHIBIT A (the "Definitional Supplement").

                                R E C I T A L S:
                                --------------- 

     WHEREAS, Elan has determined that the Bank Card Processing business is an
intensely competitive business, national in scope, which requires a substantial
investment in technology necessary to reduce costs, provide the level of service
required, and maintain profitability, and that significant economies can be
achieved by spreading the costs of technology over more customers, to yield
lower transaction costs and associated competitive advantages;

     WHEREAS, Elan seeks to form an alliance with another company in the Bank
Card Processing industry to maximize efficiencies and create economies of scale
necessary to remain a competitor in the Bank Card Processing industry;

     WHEREAS, NOVA is a company engaged in the business of providing Bank Card
Processing services, including the business of providing Bank Card Processing
services to commercial establishments which accept Credit Card and Debit Card
products;

     WHEREAS, Elan and NOVA desire to become members of a limited liability
company to provide Bank Card Processing services for Merchants and New
Merchants;

     NOW, THEREFORE, in consideration of these premises and the mutual covenants
set forth herein, the parties hereby agree as follows:


                                   ARTICLE I

                     REPRESENTATIONS AND WARRANTIES OF NOVA

     NOVA represents and warrants to Elan and Firstar Milwaukee as follows:

     1.01  To the best of its knowledge, NOVA is the rightful owner of, or fully
licensed and/or authorized to use, all right and title to the NOVA tradename and
NOVA trademarks and service marks and all processing systems, technology, know-
how, software, programs and equipment used by NOVA in performing Bank Card
Processing services.

     1.02  It is a corporation validly organized and existing under the laws of
the State of Georgia and with due authority to conduct business in all states
where it conducts business.
<PAGE>
 
     1.03  The execution and delivery of this Agreement and the consummation of
the transactions herein contemplated do not conflict in any material respect
with or constitute a material breach or material default under its
organizational documents or under the terms and conditions of any documents,
agreements or other writings to which it is a party.

     1.04  All financial information provided by NOVA to Elan prior to and
including the date hereof is true and correct in all material respects and
fairly presents the financial condition of NOVA as of the respective dates of
such information and the results of operations of NOVA for the applicable
periods of operation in accordance with generally accepted accounting principles
("GAAP") applied on a consistent basis throughout the periods involved.

     1.05  NOVA has not received notice from any Regulatory Authority indicating
that such Regulatory Authority would oppose or not grant or issue its Consent,
if required, with respect to the transactions contemplated by this Agreement and
the other Operative Documents.

     1.06  Except as set forth on SCHEDULE 1.06, no action of, or filing with,
or Consent of, any Regulatory Authority is required by NOVA to authorize, or is
otherwise required in connection with, the execution and delivery by NOVA of
this Agreement or the other Operative Documents or, if required, the requisite
filing has been accomplished and all necessary approvals and Consents obtained.

     1.07  SCHEDULE 1.07:  (i) sets forth all material Litigation relating to
NOVA's Merchant Activities (including Litigation conducted by or related to any
Payment Network) that is pending, or to the knowledge of NOVA, threatened, in or
before any court, commission, arbitration tribunal, or judicial, governmental or
administrative department, body, agency, administrator or official, grand jury,
Payment Network, or any other entity or forum for the resolution of grievances,
against NOVA (collectively "Claims"), and (ii) indicates which of such Claims
are being defended by an insurance carrier, and which of such Claims being so
defended are being defended under a reservation of rights.  NOVA has made
available to Elan true, correct and complete copies of all pleadings, briefs and
other documents filed in each pending Litigation or other procedure listed in
SCHEDULE 1.07, and the judgments, orders, writs, injunctions, decrees,
indictments and information, grand jury subpoenas and civil investigative
demands, plea agreements, stipulations and awards listed in SCHEDULE 1.07.

     1.08  Except as set forth on SCHEDULE 1.08, no licenses, permits or other
authorizations of governmental authorities are necessary for the conduct by NOVA
of its Merchant Activities.


                                   ARTICLE II

                         REPRESENTATIONS AND WARRANTIES
                              OF THE ELAN ENTITIES

     Each of Elan and Firstar Milwaukee jointly and severally represent and
warrant to NOVA as follows (any matters set forth on any Schedule relating to
any Elan Entity shall specifically identify the Elan Entity to which such matter
pertains):

     2.01 To the best of its knowledge, Elan is authorized to use the Elan
trademark and the Elan Financial Services tradename for Bank Card Processing
services.

     2.02  Elan is a national bank validly organized and existing under the laws
of the United States.  Each of the Firstar Banks is a national banking
association or a commercial bank, as the case may be, validly organized

                                       2
<PAGE>
 
and existing under the laws of the United States or its state of incorporation,
as the case may be, with due authority to conduct business in all states where
it conducts business.

     2.03  The execution and delivery of this Agreement and the consummation of
the transactions herein contemplated do not conflict in any material respect
with or constitute a material breach or material default under the
organizational documents of any Elan Entity or under the terms and conditions of
any documents, agreements or other writings to which an Elan Entity is a party.

     2.04  The terms of agreements between Elan and its Correspondents and the
terms of the Merchant Agreement and Elan Merchant Regulations the Elan Entities
have been using prior to the date hereof, and all other agreements prepared by
and between Elan and its Correspondents and/or Merchants or other Elan Entities
comply in all material respects with all applicable Laws, Orders and Permits.
With respect to the Merchant Business generally, each of the Elan Entities is
not, has not been and will not be (by virtue of any past or present action,
omission to act, contract to which they are a party or any occurrence or state
of facts whatsoever) in violation of any applicable Law, Order or Permit.

     2.05  Elan is a principal member in good standing of the Credit Card
Associations.  The Elan Entities and the Merchant Business are in full
compliance in all respects with all applicable rules and regulations and
certification requirements of the Credit Card Associations, including but not
limited to applicable "Year 2000" certification requirements.  Elan has provided
(or will provide prior to Closing) NOVA true and correct copies of all contracts
and agreements between any of the Elan Entities and any of the foregoing
entities.

     2.06  All information provided by the Elan Entities to NOVA regarding the
Bank Card Processing business of the Elan Entities up to and including the date
of this Agreement is accurate in all material respects.

     2.07  None of the Elan Entities has received notice from any Regulatory
Authority indicating that such Regulatory Authority would oppose or not grant or
issue its consent or approval, if required, with respect to the transactions
contemplated by this Agreement or the other Operative Documents.

     2.08  Each Elan Entity is the owner of all rights, title and interest in
and to its Merchant Assets, free and clear of all title defects or objections,
assignments, Liens, encumbrances of any nature whatsoever, restrictions,
security interests, rights of third parties, or other liabilities, and has good
and valid title to its Merchant Assets.

     2.09  The financial and other information concerning the Merchant Business
attached hereto as SCHEDULE 2.09 (collectively, the "Financial Information") is
true, accurate, complete and correct in all material respects and fairly
presents the financial condition of the Merchant Business in respect of the
Contributed Assets as of and for the periods indicated on such information.
Further, the Financial Information does not contain any material untrue
statement, nor omit any material fact necessary in order to make the statements
made and information presented in the Financial Information, not misleading.
This representation and warranty may not be limited or satisfied by inconsistent
information provided after the date hereof.  Since August 31, 1997, there has
been no change in the Merchant Business of the Elan Entities which has resulted
in a Material Adverse Effect on the Merchant Business of the Elan Entities.

     2.10  The information relative to Merchants' annualized (i) Credit Card
sales volume and (ii) Debit Card sales volume set forth on SCHEDULE 2.10 is
true, accurate, correct and complete in all material respects as of the date
hereof and for the periods indicated, and such information does not contain any
material untrue statement nor omit any material fact necessary in order to make
the statements made and information presented therein, not misleading. This
representation and warranty may not be limited or satisfied by inconsistent
information provided after the date hereof.

                                       3
<PAGE>
 
     2.11  No Elan Entity is in default (and would not be in default upon
notice, lapse of time or both) under any provision of the Merchant Agreements. A
complete list of all Merchants is set forth on SCHEDULE 2.11(a), which
specifically identifies Merchants that are attributable to Correspondent
Agreements (collectively, "Correspondent Merchants") and further identifies the
Correspondent that has generated such Merchant.  With respect specifically to
Correspondents, SCHEDULE 2.11(a) also identifies all Correspondents, the number
of merchants associated with such Correspondent, and the processing volume
attributable to merchants attributable to such Correspondents (the information
set forth on SCHEDULE 2.11(a) is dated as of September 22, 1997).  No Elan
Entity has any reason to suspect, and has not received any notice of fraud by,
or bankruptcy or contemplated bankruptcy of, any party or guarantor to any of
the Merchant Agreements or Correspondent Agreements, and has not received any
notice of default or adverse comment from any Regulatory Authority in respect of
any of the Merchant Agreements or Correspondent Agreements.  Except as set forth
on SCHEDULE 2.11(b), no Elan Entity has given (or, to the best of its knowledge,
received) notice of election to terminate any of the Merchant Agreements or
Correspondent Agreements.  Since September 30, 1996, and except as set forth on
SCHEDULE 2.11(c), all Merchants have processed Credit Card transactions pursuant
to the Merchant Agreements.

     2.12  Except as set forth on SCHEDULE 2.12, Elan has and shall deliver to
NOVA, for and on behalf of Company, an original executed copy of each Merchant
Agreement.  All agreements between any Elan Entity and a Merchant are in the
form of one of the merchant agreements attached hereto as EXHIBIT 2.12
(collectively, the "Standard Merchant Agreements"), and are freely assignable by
the Elan Entities that are a party thereto without the consent of the applicable
Merchant or any other party.

     2.13  Elan shall deliver to NOVA, for and on behalf of Company, an original
executed copy of any guarantees of any Merchant's obligations under a Merchant
Agreement which Elan shall have in its possession. All such guaranties are in
the form of one of  the Guaranty Agreements attached hereto as EXHIBIT 2.13 (the
"Standard Guaranty"), and are freely assignable by the Elan Entities that are a
party thereto without the consent of the applicable Merchant or any other party.

     2.14  Except for the Correspondent Agreements, none of the Elan Entities
has any material agreements, written or oral, with any agent bank, other
association, financial institution, independent sales organization, or any other
third party which provides for any one or more of the following: (i) the deposit
of Credit Card or Debit Card transaction records; (ii) the settlement of Credit
Card or Debit Card transactions; (iii) the processing of Credit Card or Debit
Card transactions; or (iv) the referral of Merchants to any Elan Entity. Except
as set forth on SCHEDULE 2.14(a), Elan has and shall retain in its possession an
original signed Correspondent Agreement for each Correspondent, and shall
deliver to NOVA, for and on behalf of Company from time-to-time on NOVA's
request, a copy of the executed original of any Correspondent Agreement.  Except
for those Correspondent Agreements with the Correspondents listed on SCHEDULE
2.14(b) (collectively, the "Nonstandard Correspondent Agreements"), all such
Correspondent Agreements are either in the form of one of the Correspondent
Agreements attached hereto as EXHIBIT 2.14(a) (collectively, the "Standard
Correspondent Agreements"), or contain no material deviations (whether as to
pricing, liabilities, indemnities, rights and obligations, or otherwise) from
the Standard Correspondent Agreements.  The Nonstandard Correspondent Agreements
contain no material deviations (whether as to pricing, liabilities, indemnities,
rights and obligations, or otherwise) from the Standard Correspondent
Agreements.  All Correspondent Agreements are freely assignable by Elan without
the consent of the applicable Correspondent or any other party and provide that
the Correspondent is liable for all of the Correspondent's Merchants to Elan
under the applicable Merchant Agreement.  SCHEDULE 2.14(c) sets forth a complete
and accurate list of all amendments to Correspondent Agreements respecting the
Merchant Business that Elan has implemented and the date that each such
amendment took effect.  Copies of each such amendment are attached hereto as
EXHIBIT 2.14(b).  Attached as SCHEDULE 2.14(d) is a description of the material
terms and conditions of each agreement with a trade or other similar association

                                       4
<PAGE>
 
of merchants to which any of the Elan Entities is a party and that relate to
Merchant Activities.

     2.15  Except for disputes that have arisen in the ordinary course of
business, none of the Elan Entities is engaged in any dispute with any Merchant
or any Correspondent with respect to Merchant Activities.  None of the Elan
Entities has any reason to believe, and has not received any notice, written or
oral, that the consummation of the transactions contemplated hereunder will have
any material adverse effect on the business relationship of any Elan Entities
with any Merchant or any Correspondent.

    2.16  Neither Elan nor Firstar Milwaukee nor, to the best of their
knowledge, any Elan Entity has required any Merchant to establish or maintain
any reserve account in connection with any Merchant Agreement.

    2.17  SCHEDULE 2.17 sets forth the credit and charge cards, other than the
Credit Cards, for which any Elan Entity has contracted to provide authorization
and data capture services, and SCHEDULE 2.17 also identifies the Merchants to
whom such services are provided.  All such agreements are attached hereto as
EXHIBIT 2.17.

     2.18  With respect to the Merchants listed on SCHEDULE 2.18, which are the
one hundred (100) Merchants with the highest dollar value of Credit Card
transactions processed during the twelve (12) month period ending September 22,
1997 (collectively, the "Top 100 Merchants"), and except as are identified on
SCHEDULE 2.18(a), no Elan Entity has actual knowledge of any such Merchant that
(a) has a credit facility with that Elan Entity which will not be continued,
renewed or extended by that Elan Entity, or (b) has applied for credit from that
Elan Entity which application will be denied or rejected because such Merchant
is not sufficiently creditworthy.

     2.19  Elan is a member in good standing of the electronic funds transfer
networks identified on SCHEDULE 2.19 attached hereto (the "EFT Networks").  The
Elan Entities and the Merchant Business are in full compliance in all material
respects with all applicable rules and regulations of the EFT Networks.

     2.20  Except as set forth on SCHEDULE 2.20(a), no action of, or filing
with, or Consent of, any Regulatory Authority is required by any Elan Entity to
authorize, or is otherwise required in connection with, the execution and
delivery by the Elan Entities of this Agreement or the Operative Documents or,
if required, the requisite filing has been accomplished and all necessary
approvals and Consents obtained.  Except as disclosed on SCHEDULE 2.20(a), or as
identified on SCHEDULE 2.20(b), no filing, Consent, or other approval of any
third party is required by virtue of the execution of this Agreement or any
other Operative Document by any Elan Entity, or the consummation of the
transactions contemplated herein by any Elan Entity, to avoid the violation or
breach of, or default under, or the creation of a Lien on any of the Contributed
Assets pursuant to, the terms of any Law, Permit, Order, Contract, or other
instrument to which any Elan Entity is a party or to which any of the
Contributed Assets is subject.

     2.21  SCHEDULE 2.21 contains a complete and accurate list of all rental and
lease-purchase arrangements (with the material terms and conditions of
agreements relating to such rental and lease-purchase arrangements being
described on EXHIBIT 2.21) pursuant to which any Elan Entity leases or rents
property to any Merchant or other party in connection with the Merchant
Business.

     2.22  SCHEDULE 2.22:  (i) sets forth all material Litigation relating to
Merchant Activities of the Elan Entities (including Litigation conducted by or
related to any Payment Network) that is pending, or to the knowledge of the Elan
Entities, threatened, in or before any court, commission, arbitration tribunal,
or judicial, governmental or administrative department, body, agency,
administrator or official, grand jury, Payment Network, or any other entity or

                                       5
<PAGE>
 
forum for the resolution of grievances, against any of the Elan Entities
(collectively "Claims"), and (ii) indicates which of such Claims are being
defended by an insurance carrier, and which of such Claims being so defended are
being defended under a reservation of rights.  The Elan Entities have made
available to NOVA true, correct and complete copies of all pleadings, briefs and
other documents filed in each pending Litigation or other procedure listed in
SCHEDULE 2.22, and the judgments, orders, writs, injunctions, decrees,
indictments and information, grand jury subpoenas and civil investigative
demands, plea agreements, stipulations and awards listed in SCHEDULE 2.22.

     2.23  Except as set forth on SCHEDULE 2.23, no licenses, permits or other
authorizations of governmental authorities are necessary for the conduct of the
Merchant Business by the Elan Entities.

     2.24  Except as set forth and specifically identified in Sections (or the
corresponding Schedules) 2.11, 2.12, 2.13, 2.14, 2.17 and 2.26:

           (a) No Elan Entity has any agreement, contract, commitment or
     relationship, whether written or oral, related to the Merchant Business of
     the Elan Entities, by which Company, upon consummation of the Elan
     Contribution (as defined in Section 4.02(a) hereof), could be bound;

           (b) No Elan Entity is subject to any contract or agreement related to
     the Merchant Business of the Elan Entities containing covenants limiting
     the freedom of any Elan Entity to compete in any line of business in any
     geographic area;

           (c) With respect to the Merchant Business of the Elan Entities, there
     is no contract, agreement or other arrangement entitling any person or
     other entity to any profits, revenues or cash flows of any Elan Entity or
     requiring any payments or other distributions based on such profits,
     revenues or cash flows;

     2.25  Except as expressly set forth in SCHEDULE 2.25(a), all contracts and
agreements referred to, or required to be referred to, herein or in any Schedule
delivered hereunder are valid and binding, and are in full force and effect and
are enforceable in accordance with their terms.  Except as set forth on SCHEDULE
2.25(B), no Elan Entity has received notice of any pending or threatened
bankruptcy, insolvency or similar proceeding with respect to any party to such
agreements, and no event has occurred which (whether with or without notice,
lapse of time or the happening or occurrence of any other event) would
constitute a default thereunder by any Elan Entity, or to the knowledge of each
Elan Entity, any other party thereto.

     2.26  SCHEDULE 2.26 sets forth a complete and accurate list of each
supplier to any Elan Entity of goods and services directly related to the
Merchant Business of the Elan Entities that charged, billed or invoiced any Elan
Entity in excess of $10,000 during the 1996 calendar year. Elan has provided (or
will provide prior to the Closing) to NOVA true and correct copies of all
agreements and contracts between any Elan Entity and any of the persons and
entities listed on SCHEDULE 2.26.

     2.27  Except as set forth in SCHEDULE 2.27, since August 31, 1997, each of
the Elan Entities has conducted its Merchant Business only in the ordinary
course, and have not:

           (a) suffered any damage or destruction resulting in a Material
     Adverse Effect on its Merchant Business;

           (b) suffered any material adverse change in the working capital,
     assets, liabilities, financial condition, or business prospects relating to
     its Merchant Business, or relationships with any suppliers or customers
     listed on SCHEDULE 2.26;

                                       6
<PAGE>
 
           (c) incurred, assumed or guaranteed any material liability or
     obligation (absolute, accrued, contingent or otherwise) with respect to its
     Merchant Business, other than in the ordinary course of business consistent
     with past practice;

           (d) paid, discharged, satisfied or renewed any claim, liability or
     obligation with respect to its Merchant Business, other than payment in the
     ordinary course of business and consistent with past practice;

           (e) permitted any of its Merchant Assets to be subjected to any
     mortgage, lien, security interest, restriction, charge or other encumbrance
     of any kind;

           (f) waived any material claims or rights with respect to its Merchant
     Business;

           (g) sold, transferred or otherwise disposed of any of its Merchant
     Assets, except in the ordinary course of business consistent with past
     practice;

           (h) made any change in any method, practice or principle of financial
     or tax accounting that in any manner affected its Merchant Business or any
     financial information relating to or derived from its Merchant Business;

           (i) managed working capital components relating to its Merchant
     Business, including cash, receivables, other current assets, trade payables
     and other current liabilities in a fashion inconsistent with past practice,
     including failing to sell inventory and other property in an orderly and
     prudent manner or failing to make all budgeted and other normal capital
     expenditures, repairs, improvements and dispositions;

           (j) paid, loaned, advanced, sold, transferred or leased any
     Contributed Asset to any employee, except for normal compensation involving
     salary and benefits;

           (k) entered into any material commitment or transaction, other than
     in the ordinary course of business consistent with past practice, affecting
     its Merchant Business; or

           (l) agreed in writing, or otherwise, to take any action described in
     this Section.

     2.28  No representations, warranties, assurances or statements by any Elan
Entity in this Agreement, and no statement contained in any document (including
the Financial Information and the Schedules), certificates or other writings
furnished by any Elan Entity (or caused to be furnished by any Elan Entity) to
NOVA or any of its Representatives pursuant to the provisions hereof, contains
any untrue statement of material fact, or omits or will omit to state any fact
necessary, in light of the circumstances under which such statement was made, in
order to make the statements herein or therein not materially misleading.


                                  ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF ALL PARTIES

     3.01  ALL PARTIES. NOVA represents and warrants for itself, and each of
Elan and Firstar Milwaukee jointly and severally represents and warrants, that:

                                       7
<PAGE>
 
           (a) It has the corporate power and authority to execute and deliver
     this Agreement and to perform its obligations hereunder. Such execution,
     delivery, performance and consummation have been duly authorized by all
     necessary action on its part.  This Agreement has been duly executed and
     delivered by its duly authorized officers, and constitutes its valid and
     legally binding obligation enforceable against it in accordance with the
     terms hereof, except as the same may be limited by (i) applicable
     bankruptcy, reorganization, insolvency, moratorium or other similar laws
     from time to time in effect affecting creditors' rights generally or (ii)
     equitable principles of general application.

           (b) It is not, and execution of this Agreement will not cause it to
     be, in violation of any term of its charter, certificate of incorporation
     or by-laws; or any agreement or any instrument to which it is a party, any
     law, rule or regulation of any governmental authority, or any applicable
     order, judgment or decree of any court, arbitrator or governmental
     authority, which violation could have a Material Adverse Effect on its
     ability to enter into, execute, deliver or perform its obligations under
     this Agreement, or its business or financial condition.

           (c) There is no Litigation, proceeding or pending or, to its
     knowledge, threatened, which involves any substantial risk of a Material
     Adverse Effect on its business or financial condition, or which could have
     a Material Adverse Effect on the value to the other party to this
     Agreement.

           (d) It possesses all governmental or other licenses, franchises,
     consents, authorizations, orders, approvals or permits necessary to the
     conduct of its business.

     3.02  DISCLAIMER OF WARRANTIES.

           OTHER THAN THOSE REPRESENTATIONS AND WARRANTIES EXPRESSLY MADE IN
           THIS AGREEMENT OR IN THE OTHER OPERATIVE DOCUMENTS, NO PARTY HERETO
           MAKES ANY REPRESENTATIONS OR WARRANTIES OF ANY KIND EXPRESS OR
           IMPLIED ARISING OUT OF OR RELATING TO THIS AGREEMENT.


                                   ARTICLE IV

                    FORMATION OF COMPANY AND RELATED MATTERS

     4.01  FORMATION OF COMPANY.  Promptly following the execution of this
Agreement, Elan and Firstar Milwaukee will cause to be formed a Wisconsin
limited liability company (the "Company") by filing Articles of Organization (in
the form of EXHIBIT 4.01 attached hereto) with the office of the Department of
Financial Institutions of the State of Wisconsin.  Upon the consummation of the
"Elan Contribution" described in Section 4.02 below, Elan and Firstar Milwaukee
shall be the sole Members of the Company, with Elan owning a ninety-nine percent
(99%) Member Interest in the Company, and Firstar Milwaukee owning a one
percent (1%) Member Interest in the Company.  In connection therewith:

           (a) The name of the Company shall be "Elan Merchant Services, LLC,"
     or such other name as Elan and NOVA may mutually agree upon in writing.

           (b) The purposes of the Company shall be to engage in the Merchant
     Business and the Merchant Activities and Bank Card Processing relating
     thereto (collectively, the "Business").  The Merchant Services to be sold
     and provided by the Company in the Business shall include, but not be
     limited to, verification of FTD authorizations at the time of purchase,
     processing FTD transactions, settlement of FTD transactions, and depositing
     funds in merchant accounts, and all other activities related or incident to
     Bank Card Processing.  Notwithstanding the foregoing, the Business and

                                       8
<PAGE>
 
     Merchant Services shall be limited to engaging in activities that are part
     of, or incidental to, the business of banking, or in otherwise permitted
     activities for national banks or for entities in which national banks are
     permitted to invest, for so long as Elan maintains a national bank charter,
     all as set forth in further detail in the Operating Agreement.

           (c) The initial principal place of business of the Company shall be
     in or near Atlanta, Georgia.

           (d) Prior to the Closing, Elan and Firstar Milwaukee shall cause the
     Company to approve the obligations of the Company under this Agreement and
     the Company shall, at the Closing, execute the Company Supplement to this
     Agreement (the "Company Supplement," attached hereto as EXHIBIT 4.01(D))
     evidencing such approval and the Company's contractual obligation to abide
     by the terms of this Agreement and the other Operative Documents.

     4.02  CONTRIBUTION/COMPANY INTEREST PURCHASE.

           (a) Following the formation of the Company, but prior to the
     "Closing" (as defined in Section 4.03 below), the Elan Entities, in a
     contribution intended to qualify under Section 721 of the Code, shall
     assign, transfer, convey and deliver to the Company, free and clear of all
     Liens, and the Company shall acquire from the Elan Entities (the "Elan
     Contribution"), all right, title and interest of the Elan Entities in the
     Merchant Assets of the Elan Entities and, simultaneously therewith, the
     Elan Entities shall transfer to the Company, and the Company shall assume
     and agree thereafter to pay and discharge when due, the Assumed Liabilities
     (the date of the Elan Contribution is referred to herein as the
     "Contribution Date"). It is understood and agreed that the Company shall
     not assume or become liable for the payment of any debts, Liabilities,
     losses, Credit Losses, Chargebacks, accounts payable, bank indebtedness, or
     other obligations of any Elan Entity, any Merchant, or any Correspondent,
     whether the same are known or unknown, whether absolute or contingent,
     liquidated or disputed, except for Assumed Liabilities. Accordingly, at the
     Contribution Date, each contributing Elan Entity shall cause to be
     delivered to the Company the Merchant Assets to be contributed by it
     hereunder, together with such instruments of transfer and other
     documentation as shall be necessary to transfer good and marketable title
     thereof to the Company. The parties shall confirm such transfer and the
     assumption by the Company of the Assumed Liabilities by execution and
     delivery, at the Contribution Date, of Assignment and Assumption Agreements
     substantially in the form of EXHIBIT 4.02(A) attached hereto (each an
     "Assignment and Assumption Agreement" and collectively, the "Assignment and
     Assumption Agreements"). Notwithstanding any provisions of this or any
     other agreement to the contrary, the Capital Accounts of Elan and Firstar
     Milwaukee, upon consummation of the Elan Contribution, shall be as set
     forth on SCHEDULE 4.02(A) attached hereto.

           (b) At the Closing, NOVA shall purchase from Elan and Firstar
     Milwaukee, and Elan and Firstar Milwaukee shall sell to NOVA, a fifty-one
     percent (51%) Member Interest in the Company (the "NOVA Company Interest
     Purchase"). Specifically, NOVA shall (i) purchase Firstar Milwaukee's one
     percent (1%) Member Interest in the Company from Firstar Milwaukee, thereby
     causing Firstar Milwaukee for all purposes to no longer be a Member nor
     have any Interest in the Company, and (ii) purchase a fifty percent (50%)
     Membership Interest in the Company from Elan such that, when coupled with
     the one percent (1%) Membership Interest purchased from Firstar Milwaukee,
     NOVA shall have a fifty-one percent (51%) Membership Interest in the
     Company, with Elan retaining a forty-nine percent (49%) Membership Interest
     in the Company. The purchase price to be paid by NOVA in connection with
     the NOVA Company Interest Purchase (the "Purchase Price") shall be Twenty-
     Three Million Seven Hundred Fifty Thousand and No/100 Dollars
     ($23,750,000), such amount to be paid by NOVA to Elan and Firstar Milwaukee

                                       9
<PAGE>
 
     (allocated between Elan and Firstar Milwaukee in the manner specified in
     SCHEDULE 4.02(B) attached hereto) at the Closing by wire transfer. The
     NOVA Company Interest Purchase shall be evidenced by the Bill of Sale
     attached hereto as EXHIBIT 4.02(B).

           (c) Immediately following the consummation of the NOVA Company
     Interest Purchase, Elan and NOVA shall execute, deliver and enter into the
     Operating Agreement attached hereto as EXHIBIT 4.02(C) (the "Operating
     Agreement").

           (d) As a condition to the NOVA Company Interest Purchase, Elan and
     Firstar Milwaukee covenant and agree that they shall, make a timely and
     proper election pursuant to Code Section 197(f)(9)(B), and the proposed or
     final Treasury Regulations thereunder, to, notwithstanding any other
     provision of the Code, recognize gain on the NOVA Company Interest
     Purchase, and pay income tax on such gain, at the highest rate of income
     tax applicable to Elan and Firstar Milwaukee under the Code (the
     "Recognition of Gain Election").  For the purposes of this SECTION 4.02(D),
     the gain recognized, in the aggregate, by Elan and Firstar Milwaukee  in
     connection with the NOVA Company Interest Purchase shall, notwithstanding
     anything to the contrary in this Agreement or under the Code, be equal to
     the Purchase Price.

           (e) Notwithstanding anything to the contrary herein or in any other
     Operative Document, Elan covenants and agrees, on behalf of Firstar
     Milwaukee and each other Elan Entity, that it shall fully cooperate in
     assisting NOVA, on behalf of the Company, to cause the Company to make a
     proper 754 election (the "754 Election") under the Code, and the Treasury
     Regulations thereunder, such that the 754 Election shall be effective for
     the Company's first taxable year.

     4.03  TIME AND PLACE OF CLOSING.  The Closing herein contemplated (the
"Closing") will take place at 10:00 a.m. on the "Closing Date" (as defined
below in this Section 4.03) and shall be effective as of the close of business
on said Closing Date.  Subject to the terms and conditions of this Agreement,
unless otherwise mutually agreed upon in writing by an executive officer of each
of NOVA and Elan, the parties shall use their reasonable efforts to cause the
"Closing Date" to occur not later than the later of (i) October 31, 1997, or
(ii) the last Business Day of the calendar month during which the third (3rd)
Business Day following the effective date (including expiration of any
applicable waiting period) of the last required Consent of any Regulatory
Authority (having authority over and approving or exempting the transactions
contemplated by this Agreement) occurs. The place of Closing shall be at the
offices of Firstar Corporation, 777 E. Wisconsin Avenue, Milwaukee, Wisconsin,
or such other place as may mutually be agreed upon by NOVA and Elan.

     4.04  DEFAULT BY ANY PARTY HERETO AT THE CLOSING.  If any of the Elan
Entities on the one hand, or NOVA on the other hand, shall fail or refuse to
consummate either the NOVA Company Interest Purchase or the Elan Contribution,
as provided in Section 4.02 above and other than as may result from the exercise
of a party's rights under this Agreement, or if the parties shall fail or refuse
to consummate any of the transactions described in this Agreement, prior to or
on the Closing Date, the non-defaulting party (i.e. either Elan or NOVA), at its
option and without prejudice to its rights against any defaulting party, may
either (i) unilaterally delay the Closing while taking appropriate judicial
action or seeking other remedies, or (ii) refuse to consummate such transactions
and thereby terminate all of its obligations hereunder without any Liability.
The parties hereto acknowledge that the NOVA Company Interest Purchase and the
Elan Contribution, together with the 754 Election, are unique and otherwise not
available and agree that, in addition to any other remedies, the non-defaulting
party (i.e. either Elan or NOVA) may invoke any equitable remedies to enforce
delivery or consummation of the NOVA Company Interest Purchase or the Elan
Contribution or the 754 Election, as the case may be, including, without
limitation, any action or suit for specific performance, as further detailed in
Section 13.15 hereof.

                                       10
<PAGE>
 
                                   ARTICLE V

                 CERTAIN ELAN RESPONSIBILITIES AND COMMITMENTS


  5.01   REGULATORY APPROVALS.

           (a) FOR ELAN.  Elan shall be responsible, at its own expense, for
     obtaining all Consents of Regulatory Authorities required for it to
     participate in a limited liability company of the type described in this
     Agreement, or as otherwise are necessary for any of the Elan Entities to
     consummate the transactions hereby contemplated, including but not limited
     to the Consents of Regulatory Authorities identified on SCHEDULE 2.20(a)
     attached hereto.

           (b) FOR NOVA.  Elan shall reasonably cooperate with NOVA and provide
     such information and/or assistance as Elan can reasonably provide to assist
     NOVA in obtaining any and all required Consents of Regulatory Authorities
     as provided under Section 6.01 hereof.

     5.02  SERVICES AGREEMENT.  At the Closing, Elan and the Firstar Banks shall
enter into a Services Agreement with the Company in the form of EXHIBIT 5.02
attached hereto (the "Services Agreement").


                                   ARTICLE VI

                 CERTAIN NOVA RESPONSIBILITIES AND COMMITMENTS

     6.01  REGULATORY APPROVAL(S).

           (a) FOR NOVA.  NOVA shall be responsible, at its own expense, for
     obtaining all Consents of Regulatory Authorities required for it to
     participate in a limited liability company of the type described in this
     Agreement, or as otherwise are necessary for NOVA to consummate the
     transactions hereby contemplated, including but not limited to the Consents
     of Regulatory Authorities identified on SCHEDULE 1.06 attached hereto.

           (b) FOR ELAN.  NOVA shall reasonably cooperate with Elan and provide
     such information and/or assistance as NOVA can reasonably provide to assist
     Elan in obtaining any and all required Consents of Regulatory Authorities
     as provided under Section 5.01 hereof.

           6.02  PROCESSING AGREEMENT.  At the Closing, NOVA shall enter into a
     Processing Agreement with the Company in the form of EXHIBIT 6.02 attached
     hereto (the "Processing Agreement").


                                  ARTICLE VII

                          CONDUCT OF BUSINESS PENDING
                      CONSUMMATION; ADDITIONAL AGREEMENTS

     7.01  COVENANTS OF NOVA.  From the date of this Agreement until the earlier
of the Closing or the termination of this Agreement, except as expressly

                                       11
<PAGE>
 
contemplated by this Agreement, unless the prior written consent of an executive
officer of Elan shall have been obtained, which consent shall not be
unreasonably withheld, NOVA shall (i) operate its business only in the usual,
regular, and ordinary course, which in all events shall allow NOVA to continue
to engage in, and enter into Contracts with respect to, acquisition and joint
venture activity, (ii) preserve intact its business organization and Assets, and
(iii) take no action which would materially adversely affect the ability of any
party to obtain any Consents required for the transactions contemplated hereby
without imposition of a Burdensome Condition, or which would materially
adversely affect the ability of any party to perform its covenants and
agreements under this Agreement.

     7.02  COVENANTS OF ELAN ENTITIES.  From the date of this Agreement until
the earlier of the Closing or the termination of this Agreement, except as
expressly contemplated by this Agreement, unless the prior written consent of an
executive officer of NOVA shall have been obtained, which consent shall not be
unreasonably withheld:

           (a) each Elan Entity shall (i) engage in its Merchant Activities only
     in the usual, regular, and ordinary course, (ii) preserve intact its
     Merchant Activities organization and Assets, and (iii) take no action which
     would materially adversely affect the ability of any party to obtain any
     Consents required for the transactions contemplated hereby without
     imposition of a Burdensome Condition, or which would materially adversely
     affect the ability of any party to perform its covenants and agreements
     under this Agreement.

           (b) Elan and Firstar Milwaukee shall take, and shall cause the
     Company to take, all necessary and appropriate actions required by Article
     IV of this Agreement, including the execution, delivery and performance by
     the Company of this Agreement and the Company Supplement, and the
     consummation by the Company of the transactions contemplated herein and
     therein, including the fulfillment of the Company's obligations under this
     Agreement.

           (c) No Elan Entity, nor the Company, shall do or agree or commit to
     do any of the following:

               (i)   impose, or suffer the imposition, on any of its Merchant
           Assets of any Lien or permit any such Lien to exist (other than Liens
           in effect as of the date hereof that are specifically disclosed in
           the Schedules hereto); or

               (ii)  sell, lease, mortgage or otherwise dispose of or otherwise
           encumber any Merchant Asset other than in the ordinary course of
           business for reasonable and adequate consideration; or

               (iii) commence any Litigation relating to its Merchant Activities
           other than in accordance with past practice or settle any such
           Litigation involving any Liability of an Elan Entity for restrictions
           upon the operations of the Merchant Activities; or

               (iv)  except in the ordinary course of business, modify, amend or
           terminate any material Contract that will become in whole or in part,
           an Assumed Liability hereunder, or waive, release, compromise or
           assign any material rights or claims relating to its Merchant
           Activities; or

               (v)   cause or allow the Company to incur any indebtedness, make
           any distributions, add any additional Members, allow any Member to
           make any additional contributions of capital to the Company, or make
           or allow any transfer of its Membership Interests.

                                       12
<PAGE>
 
     7.03  ADVERSE CHANGES IN CONDITION.  Each of Elan, Firstar Milwaukee and
NOVA agrees to give written notice promptly to each other party upon becoming
aware of the occurrence or impending occurrence of any event or circumstance
relating to it which (i) is reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on it or (ii) would cause or constitute a
material breach of any of its representations, warranties, or covenants
contained herein, and to use its reasonable efforts to prevent or promptly to
remedy the same.

     7.04  APPLICATIONS; ANTITRUST NOTIFICATIONS.  Each party shall promptly
prepare and file, and each other party shall cooperate in the preparation and,
where appropriate, filing of, applications with all Regulatory Authorities
having jurisdiction over the transactions contemplated by this Agreement seeking
the requisite Consents necessary to consummate the transactions contemplated by
this Agreement, as contemplated by Sections 4.01 and 5.01 hereof.  To the extent
required by the HSR Act, each party will promptly file with the United States
Federal Trade Commission and the United States Department of Justice the
notification and report form required for the transactions contemplated hereby
and any supplemental or additional information which may reasonably be requested
in connection therewith pursuant to the HSR Act and will comply in all material
respects with the requirements of the HSR Act.  Filing fees incurred in
connection with the HSR Act shall be paid fifty percent (50%) by Elan and fifty
percent (50%) by NOVA, with NOVA paying the $45,000 HSR Act filing fee (the "HSR
Fee") on behalf of NOVA and Elan, and Elan reimbursing NOVA, by wire transfer on
the same day NOVA pays the HSR Fee, in the amount of $22,500.

     7.05  AGREEMENT AS TO EFFORTS TO CONSUMMATE.

           (a) Subject to the terms and conditions of this Agreement, each party
     agrees to use its reasonable efforts to take, or cause to be taken, all
     actions, and to do, or cause to be done, all things necessary, proper, or
     advisable under applicable Laws to consummate and make effective, as soon
     as practicable after the date of this Agreement, the transactions
     contemplated by this Agreement, including using its reasonable efforts to
     lift or rescind any Order adversely affecting its ability to consummate the
     transactions contemplated herein and to cause to be satisfied the
     conditions referred to in Article VIII of this Agreement; provided, that
     nothing herein shall preclude any party from exercising its rights under
     this Agreement.  Each party shall use its reasonable efforts to obtain all
     Consents necessary or desirable for the consummation of the transactions
     contemplated by this Agreement.

           (b) Notwithstanding the conditions to Closing set forth in Article
     VIII below, if any required Consent under any Contract is not obtained by
     the date of the Closing, and the parties hereto waive such Consent and
     proceed with the Closing, each party shall nevertheless continue to pursue
     such Consents and at the request of the Company each party shall cooperate
     with the Company in any reasonable arrangement designed to provide to the
     Company the benefits under or of any such Contract or Assets relating
     thereto. Nothing contained in this Agreement or any Assignment and
     Assumption Agreement shall be deemed to constitute any assignment or
     attempted assignment by any party hereto of any Contract if any assignment
     or attempted assignment would constitute a Default thereunder. Each party
     shall use its reasonable efforts to execute all agreements to which it is
     intended to be a party in connection with the transactions contemplated
     hereby, including the Company Supplement and all other Operative Documents.

     7.06  INVESTIGATION AND CONFIDENTIALITY.

           (a) Prior to the Closing, each party shall keep each other party
     advised of all material developments relevant to its business, and to
     consummation of the Elan Contribution and the NOVA Company Interest
     Purchase, and shall permit each other party to make or cause to be made

                                       13
<PAGE>
 
     such investigation of the business and properties of it and its financial
     and legal conditions as the other party reasonably requests, provided that
     such investigation shall be reasonably related to the transactions
     contemplated hereby and shall not interfere unnecessarily with normal
     operations. No investigation by a party shall affect the representations
     and warranties of any other party.

           (b) Each party shall, and shall cause its Representatives to,
     maintain the confidentiality of all confidential information furnished to
     it by each other party concerning its businesses, operations, and financial
     positions and shall not use such information for any purpose except in
     furtherance of the transactions contemplated by this Agreement, all as
     further provided in Article X hereof.

     7.07  CERTAIN ACTIONS.  Except with respect to this Agreement and the
transactions contemplated hereby, no Elan Entity  nor any Affiliate thereof nor
any Representatives thereof, shall, at any time on or after the date hereof and
until the Closing has occurred, directly or indirectly solicit any Acquisition
Proposal by any Person or furnish any non-public information that it is not
legally obligated to furnish, negotiate with respect to, or enter into any
Contract with respect to, any Acquisition Proposal.  Elan shall promptly notify
NOVA in the event any Elan Entity receives an Acquisition Proposal.

     7.08  UPDATED SCHEDULES.  Elan and Firstar Milwaukee covenant and agree
that they shall cause the schedules identified on SCHEDULE 7.08 attached hereto
to be updated and delivered (and certified as being true and correct) to NOVA
and the Company to reflect disclosure at the Transition Date.


                                  ARTICLE VIII

                             CONDITIONS TO CLOSING

     8.01  CONDITIONS TO OBLIGATIONS OF EACH PARTY.  The respective obligations
of each party to perform this Agreement and consummate the transactions
contemplated hereby are subject to the satisfaction of the following conditions,
unless waived by Elan or NOVA pursuant to Section 13.01 of this Agreement.

           (a) REGULATORY APPROVAL.  All Consents of, filings and registrations
     with, and notifications to, all Regulatory Authorities required for
     consummation of the transactions contemplated by this Agreement shall have
     been obtained or made and shall be in full force and effect and all waiting
     periods required by Law shall have expired.  No Consent obtained from any
     Regulatory Authority which  is necessary to consummate the transactions
     contemplated hereby shall be conditioned or restricted by a Burdensome
     Condition.

           (b) CONSENTS AND APPROVALS.  In addition to the Consent of Regulatory
     Authorities referenced in Section 8.01(a) above, each party shall have
     obtained any and all Consents required for consummation of the Elan
     Contribution and the NOVA Company Interest Purchase (including, without
     limitation, the Consents identified on SCHEDULE 1.06 with respect to NOVA,
     and SCHEDULE 2.20(a) and 2.20(b) with respect to the Elan Entities).  No
     Consent so obtained which is necessary to consummate the transactions
     contemplated hereby shall be conditioned or restricted by a Burdensome
     Condition.

           (c) LEGAL PROCEEDINGS.  No court or governmental or regulatory
     authority of competent jurisdiction shall have enacted, issued,
     promulgated, enforced or entered any Law or Order (whether temporary,
     preliminary or permanent) or taken any other action which prohibits,
     materially restricts or makes illegal consummation of any of the
     transactions contemplated by this Agreement.

                                       14
<PAGE>
 
     8.02  CONDITIONS TO CLOSING.

           (a) In addition to the conditions set forth in Section 8.01 hereof,
     the consummation by the Elan Entities of the transactions contemplated
     hereby is expressly subject to the following conditions, unless waived in
     writing by Elan:

               (i)   Each and every warranty and representation of NOVA
           contained in this Agreement shall be true and correct as of the date
           when made and as of the Closing as though made on the date thereof,
           and an executive officer of NOVA shall deliver a certificate to Elan
           at the Closing certifying as such (the "NOVA Closing Certificate",
           the form of which is attached as EXHIBIT 8.02(a));

               (ii)  NOVA shall have performed and complied in all material
           respects with each and every agreement, covenant and obligation
           required by this Agreement to be performed or complied with by it at
           or prior to the Closing; and

               (iii) NOVA shall have made the deliveries contemplated by Section
           8.04 hereof.

           (b) In addition to the conditions set forth in Section 8.01 hereof,
     the consummation by NOVA of the transactions contemplated hereby is
     expressly subject to the following conditions, unless waived in writing by
     NOVA:

               (i) Each and every warranty and representation of the Elan
           Entities contained in this Agreement shall be true and correct as of
           the date when made and as of the Closing as though made on the date
           thereof, and an executive officer of Elan shall deliver a certificate
           to NOVA at the Closing certifying as such (the "Elan Closing
           Certificate", the form of which is attached as EXHIBIT 8.02(b));

               (ii) Elan shall have performed and complied in all material
           respects with each and every agreement, covenant and obligation
           required by this Agreement to be performed or complied with by it at
           or prior to the Closing; and

               (iii) The Elan Entities shall have made the deliveries
           contemplated by Section 8.03 hereof.

     8.03  DELIVERIES BY ELAN.  Elan shall deliver or cause to be delivered to
NOVA and/or the Company (as applicable), at or prior to the Closing Date, the
following, all in form reasonably satisfactory to NOVA's counsel:

           (a) Such certificates and documents of officers of the Elan Entities
     and public officials as shall be reasonably requested by NOVA's counsel to
     establish the existence and good standing of the Elan Entities and the
     Company, and the due corporate power and corporate authorization of the
     Elan Entities and the Company to execute and deliver this Agreement and the
     Operative Documents and to consummate the transactions contemplated hereby
     and thereby;

           (b) The Assignment and Assumption Agreements, duly executed by the
     Elan Entities;

           (c) The Services Agreement, duly executed by each Elan Entity;

           (d) The Operating Agreement, duly executed by Elan;

                                       15
<PAGE>
 
           (e) An opinion of Foley & Lardner, counsel to the Elan Entities, in
     form and substance reasonably acceptable to NOVA, Elan, and their
     respective counsel;.

           (f) The Company Supplement, duly executed by the Company;

           (g)  The Elan Closing Certificate;

           (h) A revised SCHEDULE 13.04(a) ("Baseline Net Revenue") and SCHEDULE
     13.05(a) ("Top 50 Merchants") (collectively, the "Affected Schedules") to
     the Operating Agreement, revised as appropriate to reflect the exclusion of
     the Specified Merchants, and in such form and substance reasonably
     acceptable to each of Elan and NOVA; provided, however, that the parties
     agree that at such time, if ever, as the Specified Merchants are assigned
     to the Company, the Affected Schedules and the Definitional Supplement
     shall be revised as appropriate to reflect the inclusion of the Specified
     Merchants, in such form and substance as reasonably acceptable to each of
     Elan and NOVA; and

           (i) All other instruments and documents required by this Agreement or
     any other Operative Document to be delivered by any of the Elan Entities to
     NOVA or the Company, including without limitation those documents necessary
     to complete the formation of the Company as provided herein, and such other
     instruments and documents which NOVA or its counsel may reasonably request
     consistent with the provisions hereof and thereof.

     8.04  DELIVERIES BY NOVA.  NOVA shall deliver or cause to be delivered to
Elan or the Company (as applicable), at or prior to the Closing, the following,
all in form reasonably satisfactory to Elan's counsel:

           (a) Such certificates and documents of officers of NOVA and public
     officials as shall be reasonably requested by Elan's counsel to establish
     the existence and good standing of NOVA and the due corporate power and
     corporate authorization of NOVA to execute and deliver this Agreement and
     the Operative Documents and to consummate the transactions contemplated
     hereby and thereby;

           (b) The Processing Agreement, duly executed by NOVA;

           (c) The Operating Agreement, duly executed by NOVA;

           (d) An opinion of Long Aldridge & Norman LLP, counsel to NOVA, in
     form and substance reasonably acceptable to Elan, NOVA, and their
     respective counsel;

           (e) The NOVA Closing Certificate; and

           (f) All other instruments and documents required by this Agreement or
     any other Operative Document to be delivered by NOVA to Elan or the
     Company, including without limitation such instruments and documents which
     Elan or its counsel may reasonably request consistent with the provisions
     hereof and thereof.

     8.05  DELIVERIES BY THE COMPANY.  At the Closing, and upon consummation of
the NOVA Company Interest Purchase, Elan and NOVA shall cause the Company to
promptly deliver to NOVA or Elan (as applicable) the following:

           (a) The Assignment and Assumption Agreements, duly executed by the
     Company;

           (b) The Services Agreement, duly executed by the Company;

                                       16
<PAGE>
 
           (c) The Processing Agreement, duly executed by the Company; and

           (d) All other instruments and documents required by this Agreement to
     be delivered by the Company to NOVA or Elan, and such other instruments and
     documents which NOVA or Elan may reasonably request consistent with the
     provisions hereof.

     8.06  COVENANTS TO SATISFY CONDITIONS.  NOVA will use all reasonable
efforts to ensure that the conditions set forth in Sections 8.01 and 8.02 hereof
are satisfied, and will timely make the deliveries described in Section 8.04.
Elan will use all reasonable efforts to ensure that the conditions set forth in
Sections 8.01 and 8.02 hereof are satisfied, and will timely make the deliveries
described in Section 8.03. In addition Elan and NOVA will use all reasonable
efforts to cause the Company to deliver to Elan and NOVA the items described in
Section 8.05 hereof.


                                   ARTICLE IX

                 INDEMNIFICATION AND LIMITATIONS ON LIABILITY

     9.01  ELAN'S OBLIGATION TO INDEMNIFY.  From and after the date hereof, Elan
and Firstar Milwaukee shall jointly and severally indemnify, defend and hold
harmless NOVA and the Company, and their respective officers, directors, agents,
representatives, and employees (Elan and Firstar Milwaukee are each referred to
in this Section 9.01 as an "Elan Indemnifying Party," and the party to whom such
indemnification obligation is owed is referred to in this Section 9.01 as a
"NOVA Indemnified Party"), from and against, any and all actions, claims,
losses, Credit Losses, Chargebacks, costs, Liabilities, damages, deficiencies,
diminution in value, and expenses (including reasonable attorneys' fees)
(collectively, "Claims") resulting from or arising out of any material
misrepresentation, breach of, or inaccuracy in, any representation or warranty
or material nonfulfillment or breach by any Elan Entity of any of its
agreements, covenants or obligations contained in this Agreement, and will
promptly reimburse any NOVA Indemnified Party for all Claims as incurred in
connection with the investigation of, preparation for or defense of any pending
or threatened action or proceeding (collectively, "Proceedings"), whether or not
such NOVA Indemnified Party is a formal party to any such Proceeding.
Notwithstanding the foregoing, Elan and Firstar Milwaukee shall not be liable
(a) for any amount paid by or on behalf of a NOVA Indemnified Party in
settlement of any Claim without the consent of an Elan Entity, or (b) in respect
of any losses, claims, damages, liabilities or expenses that a court of
competent jurisdiction shall have determined by final judgment resulted
primarily from the bad faith, negligence, or willful misconduct of NOVA.  A NOVA
Indemnified Party shall not, without the prior written consent of an Elan
Entity, settle, compromise or consent to the entry of any judgment in any
pending or threatened Proceeding in respect of which indemnification may be
sought hereunder (whether or not the NOVA Indemnified Party is an actual or
potential party to such Proceeding), provided, however, that the NOVA
Indemnified Party may execute such settlement, compromise or consent to the
entry of judgment in any pending or threatened Proceeding if same includes an
unconditional release of the Elan Indemnifying Party hereunder from all
liability arising out of such Proceeding.

     9.02  NOVA'S OBLIGATION TO INDEMNIFY.  From and after the date hereof, NOVA
shall indemnify, defend and hold harmless Elan, Firstar Milwaukee, and the
Company, and their respective officers, directors, agents, representatives, and
employees (the party to whom such indemnification obligation is owed is referred
to herein as an "Elan Indemnified Party"), from and against, any and all
actions, claims, losses, Credit Losses, Chargebacks, costs, Liabilities,
damages, deficiencies, diminution in value, and expenses (including reasonable
attorneys' fees) (collectively, "Claims") resulting from or arising out of any
material misrepresentation, breach of, or inaccuracy in, any representation or
warranty or material nonfulfillment or breach by NOVA of any of its agreements,

                                       17
<PAGE>
 
covenants or obligations contained in this Agreement, and will promptly
reimburse any Elan Indemnified Party for all Claims as incurred in connection
with the investigation of, preparation for or defense of any pending or
threatened action or proceeding (collectively, "Proceedings"), whether or not
such Elan Indemnified Party is a formal party to any such Proceeding.
Notwithstanding the foregoing, NOVA shall not be liable (a) for any amount paid
by or on behalf of an Elan Indemnified Party in settlement of any Claim without
the consent of NOVA, or (b) in respect of any losses, claims, damages,
liabilities or expenses that a court of competent jurisdiction shall have
determined by final judgment resulted primarily from the bad faith, negligence,
or willful misconduct of an Elan Entity.  An Elan Indemnified Party shall not,
without the prior written consent of NOVA, settle, compromise or consent to the
entry of any judgment in any pending or threatened Proceeding in respect of
which indemnification may be sought hereunder (whether or not the Elan
Indemnified Party is an actual or potential party to such Proceeding), provided,
however, that the Elan Indemnified Party may execute such settlement, compromise
or consent to the entry of judgment in any pending or threatened Proceeding if
same includes an unconditional release of NOVA hereunder from all liability
arising out of such Proceeding.

     9.03  PROCEDURE.  Promptly after a party to whom an indemnification
obligation is owed hereunder (an "Indemnified Party") receives notice of the
commencement of any Proceeding in respect of which indemnification may be sought
hereunder, the Indemnified Party will notify the party that is obligated to
indemnify hereunder (an "Indemnifying Party"); but the omission to so notify the
Indemnifying Party shall not relieve the Indemnifying Party from any obligation
hereunder unless, and only to the extent that, such omission results in the
Indemnifying Party's forfeiture of substantive rights or defenses.  If any such
Proceeding shall be brought against the Indemnified Party, the Indemnifying
Party shall, upon written notice given reasonably promptly following the
Indemnified Party's notice to the Indemnifying Party of any such Proceeding, be
entitled to assume the defense thereof at its own expense with counsel chosen by
the Indemnifying Party and reasonably satisfactory to the Indemnified Party;
provided; however, that any Indemnified Party may, at its own expense, retain
separate counsel to participate in such defense.

     9.04  LIMITATION ON LIABILITY.  IN NO EVENT SHALL ANY PARTY HERETO BE
LIABLE TO THE OTHER UNDER ANY THEORY OF TORT, CONTRACT, STRICT LIABILITY, OR
OTHER LEGAL OR EQUITABLE THEORY FOR ANY LOST PROFITS, EXEMPLARY, PUNITIVE,
SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES, EACH OF WHICH IS HEREBY
EXCLUDED BY AGREEMENT OF THE PARTIES REGARDLESS OF WHETHER ANY PARTY HERETO HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.


                                   ARTICLE X

                  CONFIDENTIAL INFORMATION; BOOKS AND RECORDS

     10.01 CONFIDENTIAL INFORMATION.

           (a) The parties agree that any and all technical or business
     information including, but not limited to, customer data, marketing plans,
     customer lists, customer information, customer account numbers, the status
     of any account, pricing information, computer access codes, instruction
     and/or procedural manuals or financial data of either party ("Information")
     furnished or disclosed by any party to another party or obtained by any
     party as a result of its ownership interest in the Company shall be deemed
     the property of the disclosing party or the Company, as applicable, and
     when in tangible form, shall be returned by the receiving party to the
     disclosing party or the Company upon request along with any copies as may
     be authorized herein.

                                       18
<PAGE>
 
          (b) "Information" shall not include: (1) information previously known
     to the receiving party free of any obligation to keep it confidential as
     evidenced by written records; (2) information that has been or subsequently
     is made public, through no wrongful act of the receiving party or any third
     party; or (3) information that is received from a third party without
     restriction and without breach of this Agreement, other than information
     provided to such party in connection with its performance of this Agreement
     or any other Operative Document.

           (c) Each party agrees that it shall hold Information in confidence
     and shall not make disclosure of Information to anyone except such of its
     employees or third party contractors or agents to whom such disclosure is
     necessary for the purpose of and as permitted in performance of this
     Agreement or for the purposes set forth in Section 10.01 ("Confidential
     Information/Cross Marketing") of the Operating Agreement, except in the
     following circumstances: (1) as required by the Payment Networks; (2) as
     required by law, regulation or government authority; or (3) to defend
     against a claim brought against the party. Each party shall appropriately
     notify each employee, contractor, or agent to whom Information is disclosed
     that any such disclosures are made in confidence and shall be kept in
     confidence by such employee, contractor, or agent, and shall require any
     third party contractor or agent to sign a written agreement to maintain the
     confidentiality of the Information.

           (d) If the transactions contemplated by this Agreement are not
     consummated, the parties  shall maintain the confidentiality of
     Information, and such Information shall not be used to the detriment of the
     disclosing party or otherwise in any manner, and all such Information
     (including copies and extracts thereof) shall be returned to the disclosing
     party immediately upon its written request.

           (e) The obligations of the parties hereunder shall survive and be
     enforceable by temporary and permanent injunctive relief against the
     breaching party and its employees, officers, directors, agents,
     representatives, and contractors notwithstanding any termination of this
     Agreement.

     10.02 CONFIDENTIALITY OF AGREEMENT.

           (a) Except as required by law or the Payment Network Regulations, the
     parties shall keep confidential and not disclose, and shall cause their
     officers, employees, and agents to keep confidential and not disclose, any
     of the terms and conditions of this Agreement or any of the Operative
     Documents to any third party without the prior written consent of all other
     parties.

           (b) The obligations of the parties hereunder shall survive and be
     enforceable by temporary and permanent injunctive relief against the
     breaching party and its employees, officers, directors, agents,
     representatives, and contractors notwithstanding any termination of this
     Agreement.

     10.03 BOOKS AND RECORDS.

           (a) As soon after the Closing Date as is practicable, and in no event
     later than the Transition Date, Elan shall deliver to NOVA, for and on
     behalf of the Company, originals of all Assigned Merchant Agreements and
     related documentation.  Elan shall retain originals of all Assigned
     Correspondent Agreements but shall provide copies of particular Assigned
     Correspondent Agreements to NOVA, for and on behalf of Company, from time
     to time upon NOVA's reasonable request.  Upon the Company's reasonable
     request, the Elan Entities shall cause to be delivered to the Company any
     or all original books, records and/or documentation relating to the
     Contributed Assets as are reasonably related to the Company's Merchant
     Business, as needed, or the enforcement of the Company's rights with
     respect to the Contributed Assets.  In each case, however, the books and

                                       19
<PAGE>
 
     records relating to the Contributed Assets for the period prior to the
     Closing Date, wherever located, that are held by a party hereto or under
     the control of a party hereto (the "Inspected Party") shall be open for
     inspection by the other party, and such other party's authorized agents and
     representatives and regulators may, at such other party's own expense, make
     such copies of any excerpts from such books, records and documents as it
     shall reasonably deem necessary; provided, however, that any such
     inspection: (a) shall be conducted during normal business hours from time
     to time reasonably established by the Inspected Party; (b) shall, if the
     Inspected Party so requests, be conducted in the presence of an officer or
     designated representative of the Inspected Party; and (c) shall be
     conducted in accordance with reasonable security programs and procedures
     from time to time established by the Inspected Party, including but not
     limited to such confidentiality agreements as the Inspected Party may
     reasonably request.

           (b) All books and records relating to the Contributed Assets shall be
     maintained by the Company, or the Elan Entities, as the case may be, for a
     period of seven (7) years after the termination of the Operating Agreement,
     unless the parties shall, applicable law permitting, agree upon a shorter
     period; provided, however, that in the event that, as of the end of such
     period, any taxable year of the Company, NOVA or Elan is still under
     examination or open for examination by any taxing authority and that party
     has given notice of that fact to the other party, such books and records
     shall be maintained (or, alternatively, delivered by the Inspected Party to
     the other party) until the date, determined reasonably and in good faith,
     specified for maintenance of such records in such notice.  Prior to the
     destruction of any books and records relating to the Contributed Assets,
     the party in possession of such books and records shall offer them to the
     other party hereto.


                                   ARTICLE XI

                     MEDIATION AND ARBITRATION OF DISPUTES

     11.01 MEDIATION AND ARBITRATION.

           (a) In the event of any dispute, claim, question or disagreement
     arising out of or relating to this Agreement, other than a matter for which
     a dispute resolution mechanism is specifically provided in this Agreement
     (including but not limited to a party's right to seek specific performance,
     judicial remedies or injunctive relief as provided in Sections 4.04, 10.01,
     10.02, or 13.15 hereof) the parties shall use reasonable efforts to settle
     such dispute, claim, question or disagreement. To this effect, they shall
     consult and negotiate with each other, in good faith, and, recognizing
     their mutual interests, attempt to reach a just and equitable solution
     satisfactory to both parties. If settlement is not otherwise possible
     within a reasonable time, the Chief Executive Officers, Chief Financial
     Officers, or other comparable or more senior executive officers of Elan and
     NOVA, or Firstar Corporation and NOVA Corporation, respectively, shall
     become involved in such efforts (provided, however, that in no event shall
     the officers designated by each party be a member of the Company's
     Management Committee).

           (b) If the parties do not reach such a solution within a period of
     thirty (30) days, then the parties agree first to endeavor in good faith to
     amicably settle their dispute by mediation in accordance with the CPR Model
     Procedure for Mediation of Business Disputes, promulgated by the Center for
     Public Resources, New York City.

           (c) If mediation is unsuccessful within a reasonable time after
     commencement of proceedings as set forth above, but not less than thirty
     (30) days thereafter, the mediator shall so certify and the dispute shall

                                       20
<PAGE>
 
     be submitted to binding arbitration conducted in accordance with the CPR
     Rules for Non-Administered Arbitration of Business Disputes.  Any
     controversy or dispute shall be arbitrated by a single arbitrator either
     mutually agreed upon by the parties or, absent agreement, appointed in
     accordance with the aforesaid CPR rules.  No mediator under subsection (b),
     above, may serve as an arbitrator.  The arbitration shall be governed by
     the United States Arbitration Act, 9 USC 1-16, and judgment upon the award
     may be entered by any court having jurisdiction thereof.  The arbitrator
     shall have case management authority and shall resolve the controversy in a
     final award within 180 days from commencement of the arbitration action.
     All questions of arbitrability shall be resolved by the arbitrator
     appointed pursuant to this clause.  The prevailing parties shall be
     entitled to receive an award of attorney's fees incurred in connection with
     the arbitration and judicial proceedings related thereto.  There shall be
     no appeal from the arbitral award, except for fraud committed by the
     arbitrator(s) in carrying out his duties under the aforesaid rules;
     otherwise the parties irrevocably waive their rights to judicial review of
     any claim or controversy arising out of or related to this Agreement.

           (d) Unless otherwise agreed by the parties, the situs for dispute
     resolution shall be Washington, D.C.

           (e) In the event that the Center for Public Resources no longer
     promulgates rules as set forth above, then the mediation or binding
     arbitration shall be administered under the rules of the American
     Arbitration Association or such other recognized rules for resolution of
     disputes as the parties may mutually agree.


                                  ARTICLE XII

                              TERM AND TERMINATION

     12.01 TERM.  This Agreement shall take effect on the date hereof and remain
in effect for so long as the Operating Agreement remains in effect or until
terminated pursuant to Section 12.02 hereof.

     12.02 TERMINATION IF CLOSING DOES NOT OCCUR.  This Agreement and the
transactions contemplated hereby may be terminated at any time prior to the
Closing, as follows:

           (a) By written consent of each of Elan, Firstar Milwaukee, and NOVA.

           (b) By either Elan or NOVA, if NOVA with respect to Elan, or any of
     the Elan Entities with respect to NOVA, shall have failed to satisfy any of
     the conditions it is required to satisfy set forth in Article VIII hereof.

           (c) By either Elan or NOVA if the Closing has not occurred by 
     April 1, 1998.

     12.03 EFFECT OF TERMINATION.  In the event of the termination of this
Agreement pursuant to Section 12.02, this Agreement shall become void and have
no effect, except that the provisions of Articles IX, XI, and XIII, and Sections
10.01 and 10.02, shall survive any such termination.

                                       21
<PAGE>
 
                                  ARTICLE XIII

                                 MISCELLANEOUS

     13.01 AMENDMENTS AND WAIVERS.  Except as otherwise expressly provided
herein, this Agreement shall not be amended, modified or waived in any fashion
except by an instrument in writing signed by the parties hereto.  Waiver by a
party of any breach of this Agreement by any other party shall not be effective
unless in writing, and no such waiver shall operate or be construed as the
waiver of the same or another breach on a subsequent occasion.

     13.02 NONASSIGNABILITY.  All terms and provisions of this Agreement shall
be binding upon and shall inure to the benefit of the parties hereto and their
respective successors and permitted assigns. This Agreement may not be assigned
by any party without the prior written consent of the other party; provided,
however, that such consent shall not be required (a) for the assignment by any
party of its rights and privileges hereunder to a person or entity controlling,
controlled by or under common control with such party (it being understood that
no such assignment shall relieve the assigning party of its duties or
obligations hereunder), or (b) for the assignment and delegation by any party of
its rights, privileges, duties and obligations hereunder to any person into or
with which the assigning party shall merge or consolidate or to which the
assigning party shall sell all or substantially all of its assets, provided that
the assignee formally agrees in writing to assume all the rights and obligations
of the assigning party created hereby.

     13.03 NO THIRD PARTY BENEFICIARIES.  This Agreement shall be binding upon
and inure to the benefit of the parties hereto and their respective legal
representatives, successors and assigns. This Agreement is not for the benefit
of any other person, and no other person shall have any rights against the
parties hereunder.

     13.04 RULES OF CONSTRUCTION.  The headings in this Agreement are inserted
only as a matter of convenience and in no way affect the terms or intent of any
provision of this Agreement.  All defined phrases, pronouns, and other
variations thereof shall be deemed to refer to the masculine, feminine, neuter,
singular, or plural, as the actual identity of the organization, person, or
persons may require.  No provision of this Agreement shall be construed against
any parties hereto by reason of the extent to which such parties or its counsel
participated in the drafting hereof.

     13.05 CHOICE OF LAW.  This Agreement is made and entered into under the
laws of the State of Wisconsin, and the laws of that State applicable to
agreements made and to be performed entirely thereunder (without giving effect
to the principles of conflicts of laws thereof) shall govern the validity and
interpretation hereof and the performance by parties hereto of their respective
duties and obligations hereunder.

     13.06 SEVERABILITY OF PROVISIONS.  If any provision of this Agreement shall
be contrary to the internal laws of Wisconsin or any other applicable law, at
the present time or in the future, such provision shall be deemed null and void,
but shall not affect the legality of the remaining provisions of this Agreement.
This Agreement shall be deemed to be modified and amended so as to be in
compliance with applicable law and this Agreement shall then be construed in
such a way as will best serve the intention of the parties at the time of the
execution of this Agreement.

     13.07 COUNTERPARTS: DELIVERY.  This Agreement may be executed in one or
more counterparts. Each such counterpart shall be considered an original and all
of such counterparts shall constitute a single agreement binding all the parties
as if all had signed a single document. The parties acknowledge that delivery of

                                       22
<PAGE>
 
executed counterparts of this Agreement may be effected by a facsimile
transmission or other comparable means, with an original document to be
delivered promptly thereafter via overnight courier.

     13.08 ENTIRE AGREEMENT. This Agreement (including any exhibits or
attachments hereto), taken together with the other Operative Documents and the
understanding between Elan and NOVA regarding the Specified Merchants,
constitute the entire agreement among the parties.  This Agreement and the other
agreements referred to in the preceding sentence supersede all prior and
contemporaneous agreements, statements, understandings, and representations of
the parties, except as provided in the preceding sentence.  There are no
representations, warranties, agreements, arrangements, or understandings, oral
or written between the parties relating to the subject matter of this Agreement
which are not fully expressed herein.  The parties agree that the traditional
formulation of the parol evidence rule (whereby extrinsic evidence may not be
used to vary or contradict the unambiguous terms of a document that represents a
final and complete expression of the parties agreement) shall govern in any
action or preceding that may ensue concerning this Agreement.

     13.09 LAST DAY FOR PERFORMANCE OTHER THAN A BUSINESS DAY.  In the event
that the last day for performance of an act or the exercise of a right hereunder
falls on a day other than a Business Day, then the last day for such performance
or exercise shall be the first Business Day immediately following the otherwise
last day for such performance or such exercise.

     13.10 NOTICES.  All notices, requests, consents, or other communications
required or permitted to be given under this Agreement shall be in writing, may
be delivered in person, by overnight air courier, or by certified or registered
mail (return receipt requested with all fees prepaid), and shall be deemed to
have been duly given and to have become effective upon the date actually
delivered to the parties or their assignees at the following addresses:

     If to Elan or Firstar Milwaukee :     Firstar Corporation
                                           777 East Wisconsin Avenue, Suite 311
                                           Milwaukee, Wisconsin 53202
                                           Attention:  Patricia A. Wesner
                                                       Senior Vice President

     with a copy to:                       Firstar Corporation
     (which shall not                      777 East Wisconsin Avenue, Suite 311
     constitute notice)                    Milwaukee, Wisconsin  53202
                                           Attention:  Peter J. Henningsen, Esq.
                                                       Senior Attorney

     If to NOVA:                           NOVA Information Systems, Inc.
                                           One Concourse Parkway, Suite 300
                                           Atlanta, Georgia 30328
                                           Attention: James M. Bahin
                                                      Vice Chairman & 
                                                      Chief Financial Officer

     with a copy to:                       Long Aldridge & Norman LLP
     (which shall not                      SunTrust Plaza, One Peachtree Center
     constitute notice)                    303 Peachtree Street, N.E., 
                                           Suite 5300
                                           Atlanta, Georgia  30308
                                           Attention:  David M. Ivey, Esq.

                                       23
<PAGE>
 
The persons or addresses to which mailings or deliveries shall be made may be
changed from time to time by notice given pursuant to the provisions of this
section.

     13.11 WAIVER OF JURY TRIAL.  The parties hereto hereby waive their
respective right to trial by jury of any cause of action, claim, counterclaim or
cross-complaint in any action, proceeding and/or hearing brought by any party
against another on any matter whatsoever relating to, resulting from, arising
out of, or in any way connected with this Agreement, or any amendment or breach
hereof, including, without limitation, any claim or injury or damage, or the
enforcement of any remedy under any law, statute, or regulation, emergency or
otherwise, now or hereafter in effect.

     13.12 EXPENSES.  Except as otherwise specifically provided in this
Agreement, each  party shall bear and pay all direct costs and expenses incurred
by it or on its behalf in connection with the transactions contemplated
hereunder, including filing, registration and applicable fees, printing fees,
and fees and expenses of its own financial or other consultants, investment
bankers, accountants, and counsel.

     13.13 PUBLICITY.   Each party will consult with the other parties prior to
issuing any press release or otherwise making any public statement with respect
to the transactions contemplated by this Agreement, and will not issue any such
release or make any such statement over the reasonable objection of the other
party, except as required by law or the rules and regulations of any relevant
securities exchange or quotation system.

     13.14 FURTHER ASSURANCES.  The parties hereto from time to time after
execution of this Agreement, without further consideration, shall execute and
deliver, as appropriate, such documents and take such actions as may be
reasonably necessary or proper to carry out and consummate the transactions
contemplated by this Agreement.

     13.15 ENFORCEMENT OF AGREEMENT.  The parties hereto agree that irreparable
damage would occur in the event that any of the provisions of this Agreement was
not performed in accordance with its specific terms or was otherwise breached.
It is accordingly agreed that the parties shall be entitled to an injunction or
injunctions to prevent breaches of this Agreement and to enforce specifically
the terms and provisions hereof in any court of the United States or any state
having jurisdiction, provided, however, that nothing contained herein shall be
construed as prohibiting any party from pursuing any other rights and remedies
available to it for such breach or threatened breach.

     13.16 FORCE MAJEURE.  Neither party shall be liable for defaults or delays
due to acts of God or the public enemy, acts or demands of government or any
government agency, strikes, fires, flood, accident, or other unforeseeable
causes beyond its control and not due to its fault or negligence.  Each party
shall notify the other of the cause of such delay within five (5) days after the
beginning thereof.

     13.17 BROKERS AND FINDERS.  Except for Smith Barney, Inc., each of the
parties represents and warrants that neither it nor any of its officers,
directors, employees, or Affiliates has employed any broker or finder or
incurred any Liability for any financial advisory fees, brokerage fees,
commissions, or finders' fees in connection with this Agreement or the
transactions contemplated hereby.  In the event of a claim by any broker or
finder based upon his or its representing or being retained by or allegedly
representing or being retained by any party, such party agrees to indemnify and
hold each other party harmless of and from any Liability in respect of such
claim.

     13.18 RELATIONSHIP OF PARTIES.  Nothing contained in this Agreement shall
be construed as constituting a partnership or agency relationship between the
parties hereto.  Prior to the Closing Date, the relationship of the parties
shall be that of prospective seller (the Elan Entities) and prospective
purchaser (NOVA).  On and after the Closing Date, the relationship of the
parties one to another for all purposes shall be that of independent members of
a limited liability company.

                                       24
<PAGE>
 
     IN WITNESS WHEREOF the undersigned hereto execute this Agreement.

                    "ELAN:"

                    FIRSTAR BANK U.S.A., N.A. D/B/A ELAN FINANCIAL SERVICES

                    By: /s/ Michael J. Schmitz
                        -------------------------------------
                        Michael J. Schmitz
                        Chairman and Chief Executive Officer


                    "FIRSTAR MILWAUKEE:"

                    FIRSTAR BANK MILWAUKEE, N.A.

                    By: /s/ Patricia A. Wesner
                        -------------------------------------
                        Patricia A. Wesner
                        Senior Vice President


                    "NOVA:"

                    NOVA INFORMATION SYSTEMS, INC.

                    By: /s/ James M. Bahin
                        -------------------------------------
                        James M. Bahin
                        Vice Chairman and Chief Financial Officer

                                       25
<PAGE>
 
                              INDEX OF SCHEDULES 
                           TO AGREEMENT RESPECTING A
                           LIMITED LIABILITY COMPANY


        SCHEDULE              DESCRIPTION
        --------              -----------

          1.06                Required Consents of Regulatory Authorities

          1.07                Litigation

          1.08                Necessary Licenses and Permits

          2.09                Financial Information

          2.10                Credit Card and Debit Card Sales Volume

          2.11(a)             Merchants and Correspondents

          2.11(b)             Notice of Election to Terminate Merchant
                              Agreements or Correspondent Agreements

          2.11(c)             Exceptions to Current Processing Activity

          2.12                Exceptions to Possession of Original Executed
                              Merchant Agreements

          2.14(a)             Exceptions to Possession of Original
                              Executed Correspondent Agreements

          2.14(b)             Nonstandard Correspondent Agreements

          2.14(c)             Amendments to Correspondent Agreements

          2.14(d)             Association Agreements

          2.17                Non Visa and MasterCard Authorizations

          2.18                Top 100 Merchants

          2.18(a)             Suspect Top 100 Merchants

          2.19                EFT Networks

          2.20(a)             Required Consents of Regulatory Authorities

          2.20(b)             All Other Required Consents

          2.21                Lease, Rental, and Lease-Purchase Arrangements

          2.22                Litigation

                                       i
<PAGE>
 
          2.23                Required Licenses and Permits

          2.25(a)             Exceptions to Agreements in Full Force and Effect

          2.25(b)             Notice of Pending or Threatened Bankruptcy

          2.26                Suppliers of Goods and Services

          2.27                Exceptions to Conduct of Business in Ordinary
                              Course

          4.02(a)             Capital Accounts of Elan and Firstar Milwaukee

          4.02(b)             Allocation of Purchase Price between Elan and 
                              Firstar Milwaukee

          7.08                Updated Schedules


                                      ii
<PAGE>
 
                                   EXHIBIT A
                                   ---------

                            DEFINITIONAL SUPPLEMENT

     "ACQUISITION PROPOSAL" means, with respect to an Elan Entity, any proposal
for the sale, assignment, transfer or conveyance, by operation of law or
otherwise, of all or a substantial portion of such party's Merchant Assets
and/or, with respect to Elan, its capital stock.

     "ACT" means Chapter 183 of the Wisconsin Statutes in its form as of the
date of this Agreement.

     "AFFILIATE" of a Person means: (i) any other Person directly, or indirectly
through one or more intermediaries, controlling, controlled by or under common
control with such Person (but not including the Company); (ii) any officer,
director, partner, employer, or direct or indirect beneficial owner of any 10%
or greater equity or voting interest of such Person; or (iii) any other Person
for which a Person described in clause (ii) acts in any such capacity; provided,
however, that, so long as First Union Corporation owns less than a fifty percent
(50%) equity or voting interest in NOVA, with respect to NOVA, in no event shall
the defined term "Affiliate," with respect to NOVA, be deemed to include First
Union Corporation or any of its wholly-owned bank subsidiaries.

     "AGREEMENT RESPECTING AN LLC" means the Agreement Respecting a Limited
Liability Company, dated October 2, 1997, by and among NOVA, Elan and Firstar
Milwaukee.

     "ASSETS" of a Person means all of the assets, properties, businesses and
rights of such Person of every kind, nature, character and description, whether
real, personal or mixed, tangible or intangible, accrued or contingent, or
otherwise relating to or utilized in such Person's business, directly or
indirectly, in whole or in part, whether or not carried on the books and records
of such Person, and whether or not owned in the name of such Person or any
Affiliate of such Person and wherever located.

     "ASSIGNED CORRESPONDENT AGREEMENT" means any Correspondent Agreement
contributed, assigned, conveyed and transferred to Company by the Elan Entities
pursuant to the Assignment and Assumption Agreements.

     "ASSIGNED CORRESPONDENT MERCHANT AGREEMENT" means a Correspondent Merchant
Agreement contributed, assigned, conveyed and transferred to the Company by the
Elan Entities pursuant to the Assignment and Assumption Agreements.

     "ASSIGNED CORRESPONDENT MERCHANT" means any Merchant that is a party to an
Assigned Correspondent Merchant Agreement.

     "ASSIGNED FIRSTAR MERCHANT" means any Merchant that is a party to an
Assigned Firstar Merchant Agreement, other than the Specified Merchants.

     "ASSIGNED FIRSTAR MERCHANT AGREEMENT" means any Firstar Merchant Agreement
contributed, assigned, conveyed and transferred to Company by the Elan Entities
pursuant to the Assignment and Assumption Agreements, other than a Merchant
Agreement to which a Specified Merchant is a party.

     "ASSIGNED MERCHANT" means any Merchant that is a party to an Assigned
Merchant Agreement, other than the Specified Merchants.

<PAGE>
 
     "ASSIGNED MERCHANT AGREEMENT" means any Merchant Agreement contributed,
assigned, conveyed and transferred to Company by the Elan Entities pursuant to
the Assignment and Assumption Agreement, which shall in all events include the
Assigned Correspondent Merchant Agreements and the Assigned Firstar Merchant
Agreements, but which shall exclude the Merchant Agreements to which a Specified
Merchant is a party.

     "ASSIGNMENT AND ASSUMPTION AGREEMENTS" means the Assignment and Assumption
Agreements entered into by the Company and each Elan Entity, a form of which is
attached as Exhibit 4.02(a) to the Agreement Respecting an LLC.

     "ASSUMED LIABILITIES" means the following liabilities or obligations: 
(a) the obligations of the Elan Entities arising on or after the Effective Date
to perform under the Assigned Merchant Agreements and the Assigned Correspondent
Agreements; (b) the obligations of the Elan Entities to pay assessments,
interchange fees, transaction fees, fines, penalties or other fees or charges to
the Payment Networks, provided such obligations relate to transactions which
occur both (i) under the Assigned Merchant Agreements or the Assigned
Correspondent Agreements; and (ii) on or after the Effective Date; 
(c) Chargebacks in respect of any Credit Card transaction processed by Company
pursuant to an Assigned Merchant Agreement on and after the Effective Date and
other Credit Losses on and after the Effective Date, but only to the extent that
such Chargeback or other Credit Loss relates to or arises out of an original
sales transaction occurring on or after the Effective Date; and (d) any other
Liabilities in respect of the Assigned Merchant Agreements and the Assigned
Correspondent Agreements, and the business conducted in connection with the
foregoing, provided that any such Liabilities relate to or arise out of events,
transactions or actions or omissions of Company on or after the Effective Date.
The Assumed Liabilities assumed by Company shall be limited to the liabilities
and obligations specified in the immediately preceding sentence and, without
limitation of the foregoing, shall not in any event include penalties or fees
that may be incurred by any of the Elan Entities in connection with the
termination of agreement(s) with any third party service providers, losses as
the result of a Chargeback or Credit Loss in respect of any Assigned Merchant
Agreement or Assigned Correspondent Agreement that result from transactions,
events, acts or omissions of an Elan Entity, a Merchant or a Correspondent which
occurred prior to the Effective Date. The Assumed Liabilities assumed by Company
with respect to the Assigned Merchant Agreements shall be limited to the
Liabilities of the Elan Entities arising under the Standard Merchant Agreements,
and the Assumed Liabilities assumed by Company with respect to the Assigned
Correspondent Agreements shall be limited further to the Liabilities of the Elan
Entities arising under the Standard Correspondent Agreements. Notwithstanding
the foregoing, (aa) nothing herein or in the Operative Documents shall be
construed to modify, amend, or alter any Liabilities or obligations of
Correspondents under the Assigned Correspondent Agreements, and (bb) in no event
shall the Assumed Liabilities include Liabilities relating to the Specified
Merchants.

     "AUXILIARY DOCUMENTS" means the written materials, except Merchant
Agreements and Correspondent Agreements, including advertising, marketing,
promotional and other related marketing materials, all as used in connection
with the Company's Merchant Business and the solicitation of merchants and
correspondents.

     "BANK CARD PROCESSING" means, with respect to any Person, acceptance of
Financial Transaction Device transaction records in documentary or electronic
form from Merchants in connection with the processing and clearing of such
records for settlement and payment to such Merchants, and such other activities
as are related to the Merchant Business or the Merchant Activities conducted or
engaged in by such Person.

     "BURDENSOME CONDITIONS" means any condition or restriction which in the
reasonable judgment of the party affected by the Burdensome Condition would so
materially and adversely impact the economic or business benefits of the
transactions contemplated by the Agreement Respecting an LLC that, had such

                                       2
<PAGE>
 
condition or requirement been known, such party would not, in its reasonable
judgment, have entered into the Agreement Respecting an LLC.

     "BUSINESS DAY" means a day other than a Saturday, Sunday, or a legal
holiday on which federally chartered banks are generally closed for business.

     "CAPITAL ACCOUNT" means the separate account maintained for each Member
pursuant to Section 3.06 of the Operating Agreement.

     "CARD ISSUING ACTIVITIES" means any and all Credit Card issuing activities
conducted by Elan.

     "CHARGEBACK" means a transaction that has been presented to either the
cardholder or the issuer of a Financial Transaction Device and for which payment
has been refused or reversed in accordance with the Payment Network Regulations.

     "CHARGEOFF" means a Chargeback that is deemed by the Company to be
uncollectible from a Merchant due to insufficient funds, refusal to pay, closed
merchant deposit account, insolvency, bankruptcy or any other reason.

     "CLOSING DATE" shall mean the date upon which the transactions contemplated
by the Agreement Respecting an LLC are consummated, as further described in
Section 4.03 of the Agreement Respecting an LLC.

     "CODE" means the Internal Revenue Code of 1986, as amended, and any
successor provisions or codes thereto.

     "COMPANY" means Elan Merchant Services, LLC, a Wisconsin limited liability
company.

     "COMPANY MINIMUM GAIN" shall have the same meaning as ascribed to the term
"partnership minimum gain" by Section 1.704-2(d) of the Treasury Regulations.

     "CONSENT" means any consent, approval, authorization, clearance, exemption,
waiver, or similar affirmation by any Person pursuant to any Contract, Law,
Order, or Permit.

     "CONTRACT" means, with respect to any Person, any enforceable written or
oral agreement, arrangement, authorization, commitment, contract, indenture,
instrument, lease, obligation, plan, practice, restriction, understanding or
undertaking of any kind or character, or other document to which such Person is
a party or that is binding on such Person or its capital stock, Assets or
business.

     "CONTRIBUTED ASSETS" means the Merchant Assets being contributed by the
Elan Entities to the Company pursuant to the Assignment and Assumption
Agreements, but shall in no event include the Merchant Agreements to which a
Specified Merchant is a party.

     "CORRESPONDENT" means any financial institution or other party, other than
an Elan Entity, that is a party to a Correspondent Agreement.

     "CORRESPONDENT AGREEMENT" means an agreement between (a) an Elan Entity
and/or the Company, and (b) a financial institution or other third party that is
unaffiliated with Elan or the Company, pursuant to which such financial
institution or other third party offers Merchant Services, in whole or in part,
to merchants, or that otherwise provides for, or establishes a contractual
relationship with respect to, one or more 

                                       3
<PAGE>
 
of the following: (i) the deposit of FTD transaction records; (ii) the
settlement of FTD transactions; (iii) the processing of FTD transactions; and/or
(iv) the processing and/or settlement of cash advance transactions.
Notwithstanding the foregoing, "Correspondent Agreement" does not include any
provisions of any agreement described in "(b)" above related to Card Issuing
Activities.

     "CORRESPONDENT MERCHANT" means a merchant that is a party to a Merchant
Agreement to which a Correspondent is also a party, or that was otherwise
generated by or related or attributable to a Correspondent.

     "CORRESPONDENT MERCHANT AGREEMENT" means any Merchant Agreement to which a
Correspondent is also a party, or that was otherwise generated by or related or
attributable to a Correspondent.

     "CORRESPONDENT PROGRAM" means the package of services offered by the
Company, with the cooperation of Elan, that enables financial institutions or
other third parties that are unaffiliated with Elan or the Company to offer
Merchant Services, in whole or in part, to merchants.

     "CREDIT CARD" means (i) a VISA card or other card bearing the symbol(s) of
VISA U.S.A., Inc. or VISA International, Inc., or (ii) a MasterCard card or
other card bearing the symbol(s) of MasterCard International Incorporated, or
(iii) any card bearing the symbols of any other Credit Card Association.

     "CREDIT CARD ASSOCIATIONS" means (i) VISA U.S.A., Inc., (ii) VISA
International, Inc., (iii) MasterCard International Incorporated, (iv) any other
Credit Card-sponsoring organization or association that hereafter contracts with
an Elan Entity or the Company to settle merchant sales transactions effected
with their Credit Cards, and any successor organization or association to any of
the foregoing.

     "CREDIT LOSS"  means any loss resulting from the failure by a Merchant or
Correspondent to pay amounts owed by it under a Merchant Agreement or
Correspondent Agreement, or any other loss incurred for any reason attributable
to a Merchant or Correspondent, including but not limited to losses due to
Chargebacks, the fraudulent practices of a Merchant or Correspondent,
uncollected Merchant or Correspondent fees, or fines.

     "DEADLOCK EVENT" has the meaning set forth in Section 14.04 of the
Operating Agreement.

     "DEBIT CARD" means a card with a magnetic stripe and bearing the symbol(s)
of one or more EFT Networks which enables the holder to pay for goods or
services by authorizing an electronic debit to the cardholder's designated
deposit account.

     "DEFAULT" means (i) any breach or violation of or default under any
Contract, Order or Permit, (ii) any occurrence of any event that with the
passage of time or the giving of notice or both would constitute a breach or
violation of or default under any Contract, Order or Permit, or (iii) any
occurrence of any event that with or without the passage of time or the giving
of notice would give rise to a right to terminate or revoke, change the current
terms of, or renegotiate, or to accelerate, increase, or impose any Liability
under, any Contract, Order or Permit.

     "DEFINITIONAL SUPPLEMENT" means this Definitional Supplement.

     "DEPRECIATION" means, for each fiscal year or other period, an amount equal
to the depreciation, amortization, or other cost recovery deduction allowable
with respect to an asset for such year or other period, except that if the Value
of an asset differs from its adjusted basis for federal income tax purposes at
the beginning of such year or other period, Depreciation shall be an amount

                                       4
<PAGE>
 
which bears the same ratio to such beginning Value as the federal income tax
depreciation, amortization, or other cost recovery deduction for such year or
other period bears to such beginning adjusted tax basis.

     "ECONOMIC RISK OF LOSS" determinations with respect to any liability of the
Company shall be made in accordance with Section 1.752-2 of the Treasury
Regulations.

     "EFFECTIVE DATE" means the date upon which the Assignment and Assumption
Agreements become effective.

     "EFT NETWORK" means the electronic funds transfer networks identified on
SCHEDULE 2.19 to the Agreement Respecting an LLC.

     "ELAN" means Firstar Bank U.S.A., N.A., d/b/a Elan Financial Services.

     "ELAN ENTITIES" means, collectively, Elan and each of the Firstar Banks.

     "ELAN MERCHANT REGULATIONS" means the rules and regulations promulgated by
Elan in connection with its conduct prior to the date hereof of the Merchant
Business, and applicable to Merchant Activities and Merchants.

     "FINANCIAL TRANSACTION DEVICE" or "FTD" means any Credit Card, Debit Card
and any other financial transaction device, such as a stored value card, "smart"
card or other financial transaction device used for the purpose of obtaining
credit or debiting consumer accounts, that is now or hereafter effected through
transactions with merchants.

     "FIRSTAR BANKS" means, collectively, Firstar Milwaukee, Firstar Minnesota,
Firstar Wisconsin, Firstar Iowa, Firstar Illinois, and Firstar Metropolitan.

     "FIRSTAR ILLINOIS" means Firstar Bank Illinois, a commercial bank organized
under the laws of the State of Illinois.

     "FIRSTAR IOWA" means Firstar Bank Iowa, N.A., a national banking
association.

     "FIRSTAR MERCHANT" means any merchant that is a party to a Merchant
Agreement to which a Firstar Bank is also a party, other than the Specified
Merchants.

     "FIRSTAR MERCHANT AGREEMENT" means any Merchant Agreement to which a
Firstar Bank is also a party, other than a Merchant Agreement to which a
Specified Merchant is a party.

     "FIRSTAR METROPOLITAN" means Firstar Metropolitan Bank and Trust, a
commercial bank organized under the laws of the State of Arizona.

     "FIRSTAR MILWAUKEE" means Firstar Bank Milwaukee, N.A., a national banking
association.

     "FIRSTAR MINNESOTA" means Firstar Bank of Minnesota, N.A., a national
banking association.

     "FIRSTAR WISCONSIN" means Firstar Bank Wisconsin, a commercial bank
organized under the laws of the State of Wisconsin.

                                       5
<PAGE>
 
     "HSR ACT" means Section 7A of the Clayton Act, as added by Title II of the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the rules
and regulations promulgated thereunder.

     "IMPLEMENTATION DOCUMENTATION" means written documentation supporting a
Merchant Application including financial statements, guaranties, and other
information relevant to evaluating and underwriting a Merchant Application.

     "INTEREST" or "MEMBERSHIP INTEREST" means the basis by which a Member's
ownership interest in the Company issued pursuant to Section 3.01(a) or (b) of
the Operating Agreement is measured.

     "INVOLUNTARY TRANSFER" means any Transfer of a Membership Interest by
operation of law or by which a Member would be involuntarily deprived or
divested of any right, title, or interest in or to the Membership Interest,
including, without limitation, (i) a Transfer on death or bankruptcy, (ii) any
foreclosure of a security interest in the Member Interest, (iii) any seizure
under levy of attachment or execution, or (iv) any Transfer to a state or to a
public office or agency pursuant to any statute pertaining to escheat or
abandoned property or forfeiture.

     "LAW" means any code, law, ordinance, regulation, reporting or licensing
requirement, rule or  statute applicable to a Person or its Assets, Liabilities
or business, including those promulgated, interpreted or enforced by any
Regulatory Authority.

     "LIABILITY" means any direct or indirect, primary or secondary, liability,
indebtedness, obligation, penalty, cost or expense (including costs of
investigation, collection and defense), deficiency, guaranty or endorsement of
or by any Person (other than endorsement of notes, bills, checks, and drafts
presented for collection or deposit in the ordinary course of business) of any
type, whether accrued, absolute or contingent, liquidated or unliquidated,
matured or unmatured, or otherwise.

     "LIEN" means any conditional sale agreement, default of title, easement,
encroachment, encumbrance, hypothecation, infringement, lien, mortgage, pledge,
reservation, restriction, security interest, title retention or other security
arrangement, or any adverse right or interest, charge, or claim of any nature
whatsoever of, on, or with respect to any property or property interest, other
than (i) Liens for current property taxes not yet due and payable, and (ii)
Liens in the form of easements and restrictive covenants on real property which
do not have a Material Adverse Effect on the use of such property by the current
owner thereof.

     "LIQUIDATOR" means the person selected as such by the Members pursuant to
Section 8.02 of the Operating Agreement.

     "LITIGATION" means any action, arbitration, complaint, criminal
prosecution, governmental or other examination or investigation, hearing,
inquiry, administrative or other proceeding relating to or affecting a party,
its business, its Assets, Contracts, or the transactions contemplated by the
Operative Documents.

     "LOCATION" means a physical location where a Merchant sells its goods
and/or services and at which it may accept Financial Transaction Devices in
payment for goods and/or services; provided that, with respect to any National
Merchant that is a trade association of merchants, "Location" shall mean the
physical location of any merchant member of such trade association at which such
member sells its goods and/or services and at which it may accept FTDs in
payment for goods and/or services.

     "LONG TERM BUSINESS PLAN" means the business plan in effect for Elan's
Merchant Business as of the Closing Date until replaced by the Company's written
long term strategic business plan, as agreed upon, modified or amended by the
Company's Management Committee.  The Long Term Business Plan shall include and

                                       6
<PAGE>
 
address such topics and items as any member of the Management Committee, and/or
Member, reasonably deem appropriate for inclusion in the Long Term Business
Plan, including, without limitation, such items as are customarily included in
business plans similar in type and complexity to the Long Term Business Plan.
NOVA and Elan agree that they shall cause the Management Committee to establish
an initial Long Term Business Plan for the Company not later than December 31,
1997.

     "MANAGER" means the Person appointed as Manager, by the vote of a majority
of the Management Committee, to manage the Company pursuant to Article VI of the
Operating Agreement.  The initial Manager shall be NOVA, or such executive
officer as NOVA shall designate in a written notice provided to all Members, and
NOVA shall serve as Manager until such time, if ever, as a replacement Manager
is elected by the vote of a majority of the Management Committee.  For purposes
of this definition, an "executive officer" shall include the Chief Executive
Officer, Chief Financial Officer, President, or any Executive Vice President,
Senior Vice President or Vice President of NOVA.  The Management Committee may,
upon a majority vote, remove the Manager, and appoint a replacement Manager, in
its sole and absolute discretion.

     "MANAGEMENT COMMITTEE" means the Management Committee of the Company, as
further described in Article VI of the Operating Agreement.

     "MATERIAL ADVERSE EFFECT" on Elan or NOVA means an event, change or
occurrence which, individually, or together with any other event, change or
occurrence, would, in the opinion of a reasonable person knowledgeable in such
matters, impair to an unreasonable degree (i) in the case of NOVA, the financial
position, business, or results of operations of NOVA or the ability of NOVA to
perform its obligations under this Agreement or to consummate the transactions
contemplated by this Agreement, (ii) in the case of Elan or Firstar Milwaukee,
the financial position, business, or results of operations of the Elan Entities
with respect to their Merchant Activities, taken as a whole, or the ability of
the Elan Entities to perform their respective obligations under this Agreement
or to consummate the transactions contemplated by this Agreement.

     "MEMBER" means Elan, NOVA, or any Member admitted pursuant to Section 2.02
of the Operating Agreement or any Transferee permitted to become a Member
pursuant to Article VII of the Operating Agreement.

     "MEMBER NONRECOURSE DEBT" means any Nonrecourse Debt of the Company for
which any Member (or related person within the meaning of Section 1.752-4(b) of
the Treasury Regulations) bears the Economic Risk of Loss.

     "MEMBER NONRECOURSE DEBT MINIMUM GAIN" shall have the meaning ascribed to
such term by Section 1.704-2(i) of the Treasury Regulations.

     "MEMBER'S SHARE OF COMPANY MINIMUM GAIN" shall be determined in accordance
with and have the meaning ascribed to such term by Section 1.704-2(g) of the
Treasury Regulations.

     "MEMBERSHIP INTEREST"or "INTEREST" means the basis by which a Member's
ownership interest in the Company issued pursuant to Section 3.01(a) or (b) of
the Operating Agreement is measured.

     "MERCHANT" means any person or entity (other than an Elan Entity, the
Company, or a Correspondent) that is a party to a Merchant Agreement, and shall
in all events include Correspondent Merchants and Firstar Merchants.

     "MERCHANT ACTIVITIES" means, with respect to any Person, acceptance of FTD
transaction records in documentary or electronic form from Merchants in
connection with the processing and clearing of such records for settlement and

                                       7
<PAGE>
 
payment to such Merchants, and such other activities as are related to the
Merchant Business or the Bank Card Processing conducted or engaged in by such
Person.

     "MERCHANT AGREEMENT" means an agreement between or among (i) an Elan
Entity, and/or a Correspondent, and/or Company, and (ii) a merchant, pursuant to
which the merchant undertakes to honor Financial Transaction Devices, and
includes, without limitation, all Assigned Merchant Agreements.

     "MERCHANT APPLICATION" means a written application to receive Merchant
Services from Company, as made by or on behalf of a person or entity or other
prospective New Merchant.

     "MERCHANT ASSETS" of a Person shall mean the following (i) all rights and
interests of such Person under Merchant Agreements and Correspondent Agreements
relating to such Person's Merchant Activities and all pertinent books and
records; (ii) all point-of-sale terminals, other equipment, furniture and
supplies used or held for use in such Person's Merchant Activities; and (iii)
the goodwill, intangible assets and value of such Person's Merchant Activities
as a going concern, to the extent any such value exists.

     "MERCHANT BUSINESS" means, with respect to any Person (or the Elan Entities
or the Company, as the context may require), acceptance of FTD transaction
records in documentary or electronic form from Merchants in connection with the
processing and clearing of such records for settlement in payment to such
Merchants, and such other activities as are related to the Merchant Activities
conducted or engaged in by such Person (or the Elan Entities or the Company, as
the context may require).

     "MERCHANT NUMBER" means the unique code assigned by the Company to identify
each Location of each distinct trade, profession, or line of business (including
telephone or mail order, and/or Internet sales) engaged in by a Merchant.

     "MERCHANT PROGRAM" means the package of services offered by the Company
which enables a merchant to make sales to persons presenting Credit Cards or
Debit Cards and that permit the merchant to present Sales Drafts to the Company
for payment and processing.

     "MERCHANT SERVICES" means FTD processing services and other related
products and services, as provided by (or similar to the services provided by)
the Company.

     "MERCHANT SETTLEMENT ACCOUNT" means the depository account or accounts
maintained by a Merchant with a depository institution into which proceeds from
Sales Drafts will be deposited and/or to which Chargebacks and merchant fees
will be charged.

     "NATIONAL MERCHANTS" means (i) merchants that operate Locations in two (2)
or more states, or (ii) merchants that operate a mail or telephone order
business promoted or advertised through mass media or direct mail to residents
of two (2) or more states, or (iii) bona fide trade associations of ten (10) or
more merchants, where such merchants collectively have Locations in two (2) or
more states.

     "NEW CORRESPONDENT MERCHANT" means a Merchant that becomes a Correspondent
Merchant on or after the Effective Date.

     "NEW MERCHANT" means any merchant that becomes a Merchant on or after the
Effective Date.

     "NONRECOURSE DEBT" shall have the meaning ascribed to such term by Section
1.752-1(a)(2) of the Treasury Regulations.

                                       8
<PAGE>
 
     "NONRECOURSE DEDUCTIONS" shall be determined in accordance with and have
the meaning ascribed to such term by Sections 1.704-2(b)(1) and -2(c) of the
Treasury Regulations.

     "NOVA" means NOVA Information Systems, Inc., a Georgia corporation.

     "NOVA SOFTWARE" means software owned, used, or licensed to or by NOVA for
the purpose of providing Processing Services.

     "OPERATING AGREEMENT" means the Operating Agreement of the Company, by and
between Elan and NOVA as Members of the Company, a form of which is attached as
EXHIBIT 4.02(c) to the Agreement Respecting an LLC.

     "OPERATIVE DOCUMENTS" means the Agreement Respecting an LLC, the Operating
Agreement, the Services Agreement, the Processing Agreement, the Assignment and
Assumption Agreements, and each other document, instrument, agreement or
certificate delivered in connection with, or contemplated by, the Agreement
Respecting an LLC.

     "ORDER" means any administrative decision or award, decree, injunction,
judgment, order, quasi-judicial decision or award, ruling, or writ of any
federal, state, local or foreign or other court, arbitrator, mediator, tribunal,
administrative agency or Regulatory Authority.

     "PAYMENT NETWORK" means any Credit Card Association, EFT Network and any
other organization or association that issues or sponsors a Financial
Transaction Device.

     "PAYMENT NETWORK MEMBER" means a financial institution that is a principal,
sponsoring, affiliate, or other member of the Payment Networks and, with respect
to any Merchant, means the member of the Payment Networks designated by Company
with respect to such Merchant.

     "PAYMENT NETWORK REGULATIONS" means, collectively, the rules and
regulations promulgated by the Credit Card Associations, the EFT Networks or any
other Payment Networks, as applicable.

     "PERMIT" shall mean any federal, state, local, and foreign governmental
approval, authorization, certificate, easement, filing, franchise, license,
notice, permit, or right to which any Person is a party or that is or may be
binding upon or inure to the benefit of any Person or its securities, Assets or
business.

     "PRICING GUIDELINES" means the pricing guidelines for Merchants in effect
for Elan as of the Closing Date (the "Interim Pricing Guidelines") until
replaced by the initial Pricing Guidelines established by the Company's
Management Committee for the purpose of establishing the parameters for pricing
decisions made by the Manager in the ordinary course of conducting the Company's
Merchant Business.  NOVA and Elan agree that they shall cause the Management
Committee to establish initial Pricing Guidelines no later than December 31,
1997.

     "PERSON" shall mean a natural person or any legal, commercial or
governmental entity, such as, but not limited to, a corporation, general
partnership, joint venture, limited partnership, limited liability company,
trust, business association, group acting in concert, or any person acting in a
representative capacity.

     "PROCESSING AGREEMENT" means the Processing Agreement by and between NOVA
and the Company, a form of which is attached as EXHIBIT 6.02 to the Agreement
Respecting an LLC.

                                       9
<PAGE>
 
     "PROCESSING SERVICES" means, collectively, the services to be provided by
NOVA to the Company pursuant to the Processing Agreement.

     "PROCESSOR"  means an organization which provides authorization and/or
clearing and settlement services on behalf of a Member.

     "PROFITS" and "LOSSES" means, for each fiscal year or other period, an
amount equal to the Company's taxable income or loss for such year or period,
determined in accordance with Code Section 703(a) (for this purpose, all items
of income, gain, loss, or deduction required to be stated separately pursuant to
Code Section 703(a)(1) shall be included in taxable income or loss), with the
following adjustments:

           (a) Any income of the Company that is exempt from federal income tax
     and not otherwise taken into account in computing Profits or Losses
     pursuant to this definition shall be added to such taxable income or loss;

           (b) Any expenditures of the Company described in Code Section
     705(a)(2)(B) or treated as Code Section 705(a)(2)(B) expenditures pursuant
     to Section 1.704-1(b)(2)(iv)(i) of the Treasury Regulations, and not
     otherwise taken into account in computing Profits or Losses pursuant to
     this definition, shall be subtracted from such taxable income or loss;

           (c) Gain or loss resulting from any disposition of Company property
     with respect to which gain or loss is recognized for federal income tax
     purposes shall be computed by reference to the Value of the property
     disposed of, notwithstanding that the adjusted tax basis of such property
     differs from its Value;

           (d) In lieu of the depreciation, amortization, and other cost
     recovery deductions taken into account in computing such taxable income or
     loss, there shall be taken into account Depreciation for such fiscal year
     or other period hereof; and

           (e) Notwithstanding any other provision of this definition, any items
     which are specially allocated pursuant to Sections 4.03, 4.04, 4.05, 4.06,
     4.07, and 4.09 of the Operating Agreement shall not be taken into account
     in computing Profits or Losses.

     "REGULATORY AUTHORITIES" shall mean, collectively, the United States
Federal Trade Commission, the United States Department of Justice, the Board of
Governors of the Federal Reserve System, the Federal Deposit Insurance
Corporation, the Office of the Comptroller of the Currency, all state regulatory
agencies having jurisdiction over NOVA or any of the Elan Entities, the
Securities and Exchange Commission, and the Payment Networks.

     "REPRESENTATIVE" means, with respect to any Person, any investment banker,
financial advisor, attorney, accountant, consultant, or other agent or
representative of such Person.

     "RETRIEVAL" means the production of the original, or an acceptable copy or
facsimile of, a Sales Draft, credit voucher or other supporting documentation by
a merchant.

     "SALES DRAFT" means the written form or electronic format supplied or
approved by the Company used in consummating Credit Card or Debit Card sales
transactions charged to the account of a Merchant's customer.

                                       10
<PAGE>
 
     "SERVICES AGREEMENT" means the Services Agreement between Elan and the
Company, the form of which is attached as EXHIBIT 5.02 to the Agreement
Respecting an LLC.

     "SETTLEMENT PROCESSOR" means the facility for electronic data transmission
to which and from which the Company (or Elan or any Merchant or Correspondent,
in the case of transaction records transmitted directly or indirectly to the
Settlement Processor by Elan or the Merchant or the Correspondent) transmits
Credit Card or Debit Card transactions and receives Merchant and Correspondent
settlement information.  The Settlement Processor currently consists of
facilities provided and maintained by Total Systems Services, Inc.  The Company
may select and substitute any other competent provider of such facilities, at
any time and from time to time, in which case the term "Settlement Processor"
will refer instead to the facility provided and maintained by such other
provider on and after the effective date of such substitution.

     "SPECIFIED MERCHANTS" means Menard's, Shopko and Von Maur.

     "STANDARD CORRESPONDENT AGREEMENT" means the forms of the Correspondent
Agreement(s) attached as EXHIBIT 2.14(a) to the Agreement Respecting an LLC.

     "STANDARD MERCHANT AGREEMENT" means the forms of the Merchant Agreement(s)
attached as EXHIBIT 2.12 to the Agreement Respecting an LLC.

     "TAX MATTERS PARTNER" means the person designated in Section 9.05 of the
Operating Agreement as provided in the regulations pursuant to Code Section
6231.

     "THIRD-PARTY NETWORK" means:  (i) the Settlement Processor, (ii) any
facility for Credit Card or Debit Card transaction processing or transmission
provided or maintained by any of the Credit Card Associations or Debit Card
Networks or other issuing authority with respect to any of the Credit Cards or
Debit Cards, or (iii) any other facility (other than any such facility provided
or maintained by the Company) for Credit Card or Debit Card transaction
processing or transmission to which Elan or any Merchant or Correspondent
transmits Credit Card or Debit Card transaction records.

     "TRANSACTION" means an FTD transaction processed by the Company.

     "TRANSFER" means, with respect to a Membership Interest, to sell, give,
assign, bequeath, pledge or otherwise encumber, divest, dispose of, or transfer
ownership or control of all, any part of, or any interest in the Membership
Interest, whether voluntarily or by operation of law; provided, however, that
the term "Transfer" does not include a pledge of the Membership Interest to a
financial institution solely as security for indebtedness; provided, further,
that in the case of such a pledge of a Membership Interest to a financial
institution, the term "Transfer" includes any action (including, without
limitation, an action in foreclosure) that is taken by the secured party in
order to transfer any interest in the Membership Interest from the pledgor in
connection with the enforcement of the security interest in the Membership
Interest after an event of default under the security agreement.

     "TRANSITION DATE" means August 31, 1998, or any date thereafter if the
Transition Date is extended pursuant to Section 1.07 of the Services Agreement.

     "TRANSITION PERIOD" means the period from the Effective Date through and
including the Transition Date.

     "TREASURY REGULATIONS" means the Federal Income Tax Regulations promulgated
under the Code, as such Regulations may be amended from time to time.  All
references herein to specific sections of the Treasury Regulations shall be

                                       11
<PAGE>
 
deemed also to refer to any corresponding provisions of succeeding Treasury
Regulations, and any references to Temporary Regulations shall be deemed also to
refer to any corresponding provisions of final Treasury Regulations.

     "UNDERWRITING GUIDELINES" means the underwriting and risk guidelines in
effect for Elan as of the Closing Date until replaced by the initial
Underwriting Guidelines established by the Company's Management Committee for
the purpose of appraising and evaluating prospective New Merchants and
prospective Correspondents, as well as for monitoring the activities and
Transactions of Merchants and Correspondents.  NOVA and Elan agree that they
shall cause the Management Committee to establish initial Underwriting
Guidelines no later than December 31, 1997.

     "VALUE" means, with respect to any asset, the asset's adjusted basis for
federal income tax purposes, except as follows:

          (a) The initial Value of any asset contributed by a Member to the
     Company shall be the gross fair market value of such asset, as determined
     by the Members;

          (b) The Values of all Company assets shall be adjusted to equal their
     respective gross fair market values, as determined by the Members as of the
     following times: (A) the acquisition of any additional interest in the
     Company by any new or existing Member in exchange for more than a de
     minimis capital contribution; (B) the distribution by the Company to a
     Member of more than a de minimis amount of Company property, unless all
     Members receive simultaneous distributions of undivided interests in the
     distributed property in proportion to their interests in the Company; and
     (C) the termination of the Company for federal income tax purposes pursuant
     to Code Section 708(b)(1)(B); and

          (c) If the Value of an asset has been determined or adjusted pursuant
     to (a) or (b) above, such Value shall thereafter be adjusted by the
     Depreciation taken into account with respect to such asset for purposes of
     computing Profits and Losses.

     "VOLUNTARY TRANSFER" means any Transfer of Membership Interest other than
an Involuntary Transfer.

                                       12
<PAGE>
 
NOVA Corporation shall furnish supplementally a copy of any omitted schedule to
the Securities and Exchange Commission (the "SEC") upon request.  NOVA
Corporation reserves the right to request confidential treatment of portions of
an omitted item pursuant to Rule 24b-2 as promulgated by the SEC under the
Securities Exchange Act of 1934, as amended.

<PAGE>
 

                                                                    EXHIBIT 99.2

                  [NOVA CORPORATION LETTERHEAD APPEARS HERE]



CONTACT:
- --------
James M. Bahin, Chief Financial Officer
NOVA Corporation (Georgia) (NYSE: NIS)
(770) 396-1456

Patricia A. Wesner, Senior Vice President
Firstar Bank Milwaukee, N.A. (NYSE: FSR)
(414) 765-5917

FOR IMMEDIATE RELEASE:
- ----------------------
October 8, 1997


                    NOVA CORPORATION (GEORGIA) (NYSE: NIS)
                      AND FIRSTAR CORPORATION (NYSE: FSR)
                       FORM PAYMENT PROCESSING ALLIANCE


ATLANTA, GEORGIA, October 8, 1997  NOVA Corporation (Georgia) (NYSE: NIS) and
Firstar Corporation today announced that NOVA Information Systems, Inc., a
wholly owned subsidiary of NOVA Corporation and Firstar's wholly owned
subsidiary, Firstar Bank, U.S.A., have entered into a definitive agreement to
jointly own and operate a limited liability company engaged in the business of
bank card payment processing.

     Firstar will contribute existing payment processing contracts (representing
approximately $3.0 billion in annualized credit and debit card volume), and NOVA
will provide technology, back office support, and other compensation paid to
Firstar.  The new company will be called Elan Merchant Services, LLC, and
Firstar will continue to sell payment processing services to merchants directly
and through its network of correspondent financial institutions under the Elan
brand.  The formation of the limited liability company is expected to be
completed, following all appropriate regulatory action, in the fourth quarter of
1997.

     Firstar, through its Elan Financial Services division, has provided payment
processing services to merchants for over thirty years, selling these services
directly and through a network of over 850 correspondent financial institutions.
In 1996, Firstar
<PAGE>
 
processed payments for more than 32,000 merchants and ranked as the 16th largest
payment processor in the United States.  NOVA's Chairman and Chief Executive
Officer  Edward Grzedzinski stated "The alliance between Firstar and NOVA adds
significant volume and greatly expands NOVA's coverage in the midwest region of
the United States.  We are pleased to be entering into this relationship with a
high quality financial institution like Firstar."  Firstar Chairman, Roger
Fitzsimonds stated "Firstar brings to this venture a strong, extensive
distribution system and a well respected brand, and NOVA contributes high
quality, sophisticated processing technology.  This strategic combination of
strengths promises increased growth for NOVA, Firstar and Firstar's
correspondent financial institutions."

     Firstar Corporation is a financial services company headquartered in
Milwaukee, Wisconsin.  Firstar distributes banking, trust, insurance, securities
brokerage and other financial services through more than 240 banking offices in
Wisconsin, Iowa, Minnesota, Illinois, Arizona and Florida and an extensive
correspondent network in the Upper Midwest.  NOVA Corporation, headquartered in
Atlanta, Georgia, is an integrated provider of transaction processing services,
related software application products and value-added services.  NOVA is one of
the ten largest merchant processors in the United States.

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