Document:

<PAGE>

                                                                Exhibit 10.25(b)

                           FOUNDING MEMBER AGREEMENT

THIS AGREEMENT is made this 18th day of August, 2000, (the "Effective Date") by
and between Wells Fargo Bank, N.A., a national banking association chartered
under the laws of the United States, ("Founding Member") and Metavante
Corporation ("Metavante").

                                   RECITALS:

WHEREAS, Metavante has executed a Master Bill Payment Services Agreement (the
"Master Agreement") with Spectrum EBP, L.L.C. ("Spectrum"), pursuant to which
Metavante has agreed to make the Bill Payment Services available to Founding
Member through Spectrum; and

WHEREAS, Founding Member desires to make the Bill Payment Services available to
customers of Founding Member and its Affiliates, subject to the terms of the
Master Agreement and this Agreement.

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and
agreements herein contained, the parties, intending legally to be bound,
mutually agree as follows:

1.   DEFINITIONS. As used in this Agreement, the defined terms shall have the
     respective meanings as set forth in the Master Agreement.

2.   IMPLEMENTATION/DEVELOPMENT FEES. Founding Member shall be directly
     responsible to pay Metavante such fees and charges as are mutually agreed
     upon by Metavante and Founding Member for implementation and development
     services provided by Metavante for Founding Member in connection with the
     Bill Payment Services. Such amounts shall be due and payable by Founding
     Member within thirty (30) days of Metavante's invoice. Founding Member
     shall pay interest at the rate of one percent (1%) per month on any amounts
     not paid in full on or before their due date and shall also pay any
     collection costs (including reasonable attorneys' fees) incurred by
     Metavante in collecting any amounts payable hereunder.

3.   BILL PAYMENT SERVICES

     Founding Member agrees that it shall execute a Bill Payment Agreement with
     Spectrum including at least those terms set forth in Schedule 3 of the
     Master Agreement. Metavante shall provide the Bill Payment Services for the
     Founding Member through Spectrum as described in, and subject to the terms
     of the Master Agreement, provided that, with respect to Bill Payment
     Services provided by Metavante for Founding Member, Metavante agrees (a)
     that the terms "Service Levels" and "Service Level Credits" shall be deemed
     to include the service levels and credits described in Attachment 1 hereto;
     and (b) that Matavante shall be responsible to Spectrum for late charges
     actually paid by Founding Member's Users as described in Attachment 2
     hereto.

4.   CONTINUATION OF OBLIGATIONS

     In the event the Master Agreement shall be terminated prior to the
     expiration of any Term other than due to Metavante's default and failure to
     cure within the time limits provided under the Master Agreement, Metavante
     and Founding Member agree that (a) Metavante shall continue to provide the
     Bill Payment Services for Founding Member to the same extent as Spectrum
     was providing the Bill Payment Services for the remainder of such Term
     according to the terms and subject to the fees and charges set forth in the
     Master Agreement, and (b) Founding Member shall be directly responsible to
     Metavante for payment of fees and performance of all obligations under the
     Master Agreement relating to the Bill Payment Services provided by
     Metavante to Founding Member. In particular, and without limitation,
     Founding Member shall be responsible to pay to Metavante the fees and
     charges as set forth in Schedule 4 to the Master Agreement, including one
     third (1/3) of any Minimum Annual Transaction Charge due and payable for
     any year as set forth in Schedule 4 to the Master Agreement, throughout the
     remainder of such Term.

                                       1
<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized officers as of the date first above written.
<TABLE>
<CAPTION>
<S>                                                          <C>
Metavante Corporation ("Metavante")                          Wells Fargo Bank, N.A.
                                                             ----------------------------------------
                                                             ("Founding Member")

By: /s/ Michael E. Touhey                                    By: /s/ Webb Edwards
   --------------------------------                             -------------------------------------
Name: Michael E. Touhey                                      Name: Webb Edwards
Title: President, Electronic Commerce Group                  Title: Executive Vice President

By: /s/ Nancy J. Langer
   --------------------------------
Name: Nancy J. Langer
Title: President, Electronic Bill Presentment and Payment
</TABLE>

                                       2

<PAGE>

                                  ATTACHMENTS

Attachment 1 Service Levels/Service Level Credits
Attachment 2 Schedule of Responsibilities for Paying Late Charges/Penalties

The above attachments to this document have been omitted. The attachments will
be furnished supplementally to the Securities and Exchange Commission upon
request.<PAGE>

                                                                Exhibit 10.25(c)

                           FOUNDING MEMBER AGREEMENT

THIS AGREEMENT is made this 18th day of August, 2000, (the "Effective Date") by
and between The Chase Manhattan Bank, a bank chartered under the laws of the
State of New York, ("Founding Member") and Metavante Corporation ("Metavante").

                                   RECITALS:

WHEREAS, Metavante has executed a Master Bill Payment Services Agreement (the
"Master Agreement") with Spectrum EBP, L.L.C. ("Spectrum"), pursuant to which
Metavante has agreed to make the Bill Payment Services available to Founding
Member through Spectrum; and

WHEREAS, Founding Member desires to make the Bill Payment Services available to
customers of Founding Member and its Affiliates, subject to the terms of the
Master Agreement and this Agreement.

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and
agreements herein contained, the parties, intending legally to be bound,
mutually agree as follows:

1.  DEFINITIONS. As used in this Agreement, the defined terms shall have the
    respective meanings as set forth in the Master Agreement.

2.  IMPLEMENTATION/DEVELOPMENT FEES. Founding Member shall be directly
    responsible to pay Metavante such fees and charges as are mutually agreed
    upon by Metavante and Founding Member for implementation and development
    services provided by Metavante for Founding Member in connection with the
    Bill Payment Services. Such amounts shall be due and payable by Founding
    Member within thirty (30) days of Metavante's invoice. Founding Member shall
    pay interest at the rate of one percent (1%) per month on any amounts not
    paid in full on or before their due date and shall also pay any collection
    costs (including reasonable attorneys' fees) incurred by Metavante in
    collecting any amounts payable hereunder.

3.  BILL PAYMENT SERVICES

    Founding Member agrees that it shall execute a Bill Payment Agreement with
    Spectrum including at least those terms set forth in Schedule 3 of the
    Master Agreement. Metavante shall provide the Bill Payment Services for the
    Founding Member through Spectrum as described in, and subject to the terms
    of the Master Agreement, provided that, with respect to Bill Payment
    Services provided by Metavante for Founding Member, Metavante agrees (a)
    that the terms "Service Levels" and "Service Level Credits" shall be deemed
    to include the service levels and credits described in Attachment 1 hereto;
    and (b) that Metavante shall be responsible to Spectrum for late charges
    actually paid by Founding Member's Users as described in Attachment 2
    hereto.

4.  CONTINUATION OF OBLIGATIONS

    In the event the Master Agreement shall be terminated prior to the
    expiration of any Term other than due to Metavante's default and failure to
    cure within the time limits provided under the Master Agreement, Metavante
    and Founding Member agree that (a) Metavante shall continue to provide the
    Bill Payment Services for Founding Member to the same extent as Spectrum was
    providing the Bill Payment Services for the remainder of such Term according
    to the terms and subject to the fees and charges set forth in the Master
    Agreement, and (b) Founding Member shall be directly responsible to
    Metavante for payment of fees and performance of all obligations under the
    Master Agreement relating to the Bill Payment Services provided by Metavante
    to Founding Member. In particular, and without limitation, Founding Member
    shall be responsible to pay to Metavante the fees and charges as set forth
    in Schedule 4 to the Master Agreement, including one third (1/3) of any
    Minimum Annual Transaction Charge due and payable for any year as set forth
    in Schedule 4 to the Master Agreement, throughout the remainder of such
    Term.

                                       1

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized officers as of the date first above written.

Metavante Corporation ("Metavante")          The Chase Manhattan Bank
                                             -----------------------------------
                                             ("Founding Member")

By:    /s/  Michael E. Touhey                By:    /s/  illegible signature
       ----------------------------                 ----------------------------
Name:  Michael E. Touhey                     Name:
                                                    ----------------------------
Title: President, Electronic                 Title:
       Commerce Group                               ----------------------------

By:    /s/  Nancy J. Langer
       ----------------------------
Name:  Nancy J. Langer

Title: President, Electronic Bill
       Presentment and Payment

                                       2
<PAGE>

                                  ATTACHMENTS

Attachment 1  Service Levels/Service Level Credits
Attachment 2  Schedule of Responsibilities for Paying Late Charges/Penalties

The above attachments to this document have been omitted. The attachments will
be furnished supplementally to the Securities and Exchange Commission upon
request.

<PAGE>

                                   ADDENDUMS

Addendum 1  Addendum to Founding Member Agreement between Metavante Corporation
            and The Chase Manhattan Bank.

The above addendum to this document has been omitted. The addendum will be
furnished supplementally to the Securities and Exchange Commission upon request.

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