Document:

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                                                                  Exhibit 4-b

                     SEACOAST FINANCIAL SERVICES CORPORATION
            _____% JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES

No. AIV-1                                                             [$      ]

         SEACOAST FINANCIAL SERVICES CORPORATION, a corporation organized and
existing under the laws of Massachusetts (hereinafter called the "COMPANY",
which term includes any successor Person under the Indenture hereinafter
referred to), for value received, hereby promises to pay to State Street Bank
and Trust Company, as Property Trustee (in such capacity, the "PROPERTY
TRUSTEE") for Seacoast Capital Trust I, a statutory business trust formed under
the laws of the State of Delaware (hereinafter called the "ISSUER TRUST"), or
registered assigns, the principal sum of [___________________________] Dollars
[($_________)] on JUNE 30, 2032; PROVIDED that the Company may shorten the
Stated Maturity of the principal of this Security to a date not earlier than
June 30, 2007. The Company further promises to pay interest on said principal
sum from ___________, 2002 or from the most recent Interest Payment Date to
which interest has been paid or duly provided for, quarterly (subject to
deferral as set forth herein) in arrears on March 31, June 30, September 30 and
December 31 of each year, commencing June 30, 2002, at the rate of _____% per
annum, together with Additional Sums, if any, as provided in Section 10.6 of the
Indenture, until the principal hereof is paid or duly provided for or made
available for payment; PROVIDED that any overdue principal, premium or
Additional Sums and any overdue installment of interest shall bear Additional
Interest at the rate of _____% per annum (to the extent that the payment of such
interest shall be legally enforceable), compounded quarterly, from the dates
such amounts are due until they are paid or made available for payment, and such
interest shall be payable on demand. The amount of interest payable for any
period less than a full interest period shall be computed on the basis of a
360-day year of twelve 30-day months and the actual days elapsed in a partial
month in such period. The amount of interest payable for any full interest
period shall be computed by dividing the applicable rate per annum by four. The
interest so payable and punctually paid or duly provided for on any Interest
Payment Date will, as provided in the Indenture, be paid to the Person in whose
name this Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest installment which
shall be the fifteenth day (whether or not a Business Day) immediately preceding
such Interest Payment Date. Any such interest not so punctually paid or duly
provided for shall forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on a
Special Record Date for the payment of such Defaulted Interest to be fixed by
the Indenture Trustee, notice whereof shall be given to Holders of Securities of
this series not less than 10 days prior to such Special Record Date, or be paid
at any time in any other lawful manner not inconsistent with the requirements of
any securities exchange on which the Securities of this series may be listed,
and upon such notice as may be required by such exchange, all as more fully
provided in said Indenture.

         So long as no Event of Default has occurred and is continuing, the
Company shall have the right, at any time during the term of this Security, from
time to time to defer the payment of

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interest on this Security for up to 20 consecutive quarterly interest payment
periods with respect to each deferral period (each an "EXTENSION PERIOD"), at
the end of which the Company shall pay all interest then accrued and unpaid,
including any Additional Interest, as provided below; PROVIDED, HOWEVER, that no
Extension Period shall extend beyond the Stated Maturity of the principal of
this Security, and no such Extension Period may end on a date other than an
Interest Payment Date; and PROVIDED, FURTHER, that during any such Extension
Period, the Company shall not (i) declare or pay any dividends or distributions
on, or redeem, purchase, acquire or make a liquidation payment with respect to,
any of the Company's capital stock, or (ii) make any payment of principal of or
interest or premium, if any, on or repay, repurchase or redeem any debt
securities of the Company that rank PARI PASSU in all respects with, or junior
in interest to, this Security (other than (A) repurchases, redemptions or other
acquisitions of shares of capital stock of the Company in connection with any
employment contract, benefit plan or other similar arrangement with or for the
benefit of any one or more employees, officers, directors or consultants, in
connection with a dividend reinvestment or stockholder stock purchase plan or in
connection with the issuance of capital stock of the Company (or securities
convertible into or exercisable for such capital stock) as consideration in an
acquisition transaction entered into prior to the applicable Extension Period,
(B) as a result of an exchange or conversion of any class or series of the
Company's capital stock (or any capital stock of a Subsidiary of the Company)
for any class or series of the Company's capital stock or of any class or series
of the Company's indebtedness for any class or series of the Company's capital
stock, (C) the purchase of fractional interests in shares of the Company's
capital stock pursuant to the conversion or exchange provisions of such capital
stock or the security being converted or exchanged, (D) any declaration of a
dividend in connection with any Rights Plan, or the issuance of rights, stock or
other property under any Rights Plan, or the redemption or repurchase of rights
pursuant thereto, or (E) any dividend in the form of stock, warrants, options or
other rights where the dividend stock or the stock issuable upon exercise of
such warrants, options or other rights is the same stock as that on which the
dividend is being paid or ranks PARI PASSU with or junior to such stock). Prior
to the termination of any such Extension Period, the Company may further defer
the payment of interest; PROVIDED that no Extension Period shall exceed 20
consecutive quarterly interest payment periods, extend beyond the Stated
Maturity of the principal of this Security or end on a date other than an
Interest Payment Date. Upon the termination of any such Extension Period and
upon the payment of all accrued and unpaid interest and any Additional Interest
then due on any Interest Payment Date, the Company may elect to begin a new
Extension Period, subject to the above conditions. No interest shall be due and
payable during an Extension Period, except at the end thereof, but each
installment of interest that would otherwise have been due and payable during
such Extension shall bear Additional Interest (to the extent that the payment of
such interest shall be legally enforceable) at the rate of _____% per annum,
compounded quarterly and calculated as set forth in the first paragraph of this
Security, from the dates on which amounts would otherwise have been due and
payable until paid or made available for payment. The Company shall give the
Holder of this Security and the Indenture Trustee notice of its election to
begin any Extension Period at least one Business Day prior to the next
succeeding Interest Payment Date on which interest on this Security would be
payable but for such deferral or, so long as such Securities are held by State
Street Bank and Trust Company, as Property Trustee for the Issuer Trust, at
least one Business Day prior to the earlier of (i) the next succeeding date on
which Distributions on the Capital Securities of such Issuer Trust would be
payable but for such deferral, and (ii) the date on which the Property Trustee
of such Issuer Trust is required to give notice to any securities exchange or
other applicable self-regulatory organization or to holders of such Capital
Securities of the record date or the date such Distributions are payable.

                                      -2-
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         Payment of the principal of and interest on this Security will be made
at the office or agency of the Company maintained for that purpose in Boston,
Massachusetts, in such coin or currency of the United States of America as at
the time of payment is legal tender for payment of public and private debts.

         The indebtedness evidenced by this Security is, to the extent provided
in the Indenture, subordinate and junior in right of payment to the prior
payment in full of all Senior Indebtedness, and this Security is issued subject
to the provisions of the Indenture with respect thereto. Each Holder of this
Security, by accepting the same, (i) agrees to and shall be bound by such
provisions, (ii) authorizes and directs the Indenture Trustee on his or her
behalf to take such actions as may be necessary or appropriate to effectuate the
subordination so provided, and (iii) appoints the Indenture Trustee his or her
attorney-in-fact for any and all such purposes. Each Holder hereof by his or her
acceptance hereof, waives all notice of the acceptance of the subordination
provisions contained herein and in the Indenture by each holder of Senior
Indebtedness, whether now outstanding or hereafter incurred, and waives reliance
by each such holder upon said provisions.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         Unless the certificate of authentication hereon has been executed by
the Indenture Trustee referred to on the reverse hereof by manual signature,
this Security shall not be entitled to any benefit under the Indenture or be
valid or obligatory for any purpose.

                                      -3-
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         IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

                                          SEACOAST FINANCIAL SERVICES
                                          CORPORATION

                                          By:
                                              ---------------------------------
                                              Name:
                                              Title:

Attest:

---------------------------------------
Name:
Title:

                                      -4-
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This is one of the Securities of the series designated therein referred to in
the within-mentioned Indenture.

Dated: __________, 2002

                                      STATE STREET BANK AND TRUST
                                      COMPANY
                                      as Indenture Trustee

                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:

                                      -5-
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                              [REVERSE OF SECURITY]

         This Security is one of a duly authorized issue of securities of the
Company (herein called the "SECURITIES"), issued and to be issued in one or more
series under the Junior Subordinated Indenture, dated as of ___________, 2002
(hereinafter called the "INDENTURE"), between the Company and State Street Bank
and Trust Company, as Trustee (herein called the "INDENTURE TRUSTEE", which term
includes any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of
the Company, the Indenture Trustee, the holders of Senior Indebtedness and the
Holders of the Securities, and of the terms upon which the Securities are, and
are to be, authenticated and delivered. This Security is one of the series
designated on the face hereof limited in aggregate principal amount to
$______________.

         All terms used in this Security that are defined in the Indenture or in
the Amended and Restated Trust Agreement, dated as of ___________, 2002 (as
modified, amended or supplemented from time to time, the "TRUST AGREEMENT"),
relating to the Issuer Trust, among the Company, as Depositor, the Property
Trustee, the Delaware Trustee named therein, the Administrative Trustees named
therein and the Holders of Trust Securities (as defined therein), shall have the
meanings assigned to them in the Indenture or the Trust Agreement, as the case
may be.

         The Company may at any time, at its option, and subject to the terms
and conditions of Article XI of the Indenture, including the receipt of prior
approval of the Federal Reserve, if such approval is then required under
applicable capital guidelines or policies, (i) on or after June 30, 2007, redeem
this Security in whole at any time or in part from time to time, and (ii) prior
to June 30, 2007, and within 90 days following the occurrence and continuation
of a Tax Event, Capital Treatment Event or Investment Company Event, redeem this
Security in whole (but not in part), in each case of clauses (i) and (ii) at a
Redemption Price equal to the accrued and unpaid interest on this Security to
the date fixed for redemption, plus 100% of the principal amount hereof.

         In the event of redemption of this Security in part only, a new
Security or Securities of this series for the unredeemed portion hereof will be
issued in the name of the Holder hereof upon the cancellation hereof.

         The Indenture contains provisions for satisfaction and discharge of the
entire indebtedness of this Security upon compliance by the Company with certain
conditions set forth in the Indenture.

         The Indenture permits, with certain exceptions as therein provided, the
Company and the Indenture Trustee at any time to enter into a supplemental
indenture or indentures for the purpose of modifying in any manner the rights
and obligations of the Company and of the Holders of the Securities, with the
consent of the Holders of not less than a majority in principal amount of the
Outstanding Securities of each series to be affected by such supplemental
indenture. The Indenture also contains provisions permitting Holders of
specified percentages in principal amount of the Securities of each series at
the time Outstanding, on behalf of the Holders of all Securities of such series,
to waive compliance by the Company with certain provisions of the

                                      -6-
<PAGE>

Indenture and certain past defaults under the Indenture and their consequences.
Any such consent or waiver by the Holder of this Security shall be conclusive
and binding upon such Holder and upon all future Holders of this Security and of
any Security issued upon the registration of transfer hereof or in exchange
herefor or in lieu hereof, whether or not notation of such consent or waiver is
made upon this Security.

         As provided in and subject to the provisions of the Indenture, if an
Event of Default with respect to the Securities of this series at the time
Outstanding occurs and is continuing, then and in every such case the Indenture
Trustee or the Holders of not less than 25% in aggregate principal amount of the
Outstanding Securities of this series may declare the principal amount of all
the Securities of this series to be due and payable immediately, by a notice in
writing to the Company (and to the Indenture Trustee if given by Holders),
PROVIDED that, if, upon an Event of Default, the Indenture Trustee or such
Holders fail to declare the principal of all the Outstanding Securities of this
series to be immediately due and payable, the holders of at least 25% in
aggregate Liquidation Amount of the Capital Securities then Outstanding shall
have the right to make such declaration by a notice in writing to the Company
and the Indenture Trustee; and upon any such declaration the principal amount of
and the accrued interest (including any Additional Interest) on all the
Securities of this series shall become immediately due and payable; PROVIDED
that the payment of principal and interest (including any Additional Interest)
on such Securities shall remain subordinated to the extent provided in Article
XIII of the Indenture. Upon payment (i) of the amount of principal so declared
due and payable and (ii) of interest on any overdue principal, premium and
interest (in each case to the extent that the payment of such interest shall be
legally enforceable), all of the Company's obligations in respect of the payment
of the principal of and premium and interest, if any, on this Security shall
terminate.

         No reference herein to the Indenture and no provision of this Security
or of the Indenture shall alter or impair the obligation of the Company, which
is absolute and unconditional, to pay the principal of (and premium, if any) and
interest (including any Additional Interest) on this Security at the times,
place and rate, and in the coin or currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Securities
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company maintained under Section 10.2 of the Indenture
for such purpose, duly endorsed by, or accompanied by a written instrument of
transfer in form satisfactory to the Company and the Securities Registrar duly
executed by, the Holder hereof or such Holder's attorney duly authorized in
writing, and thereupon one or more new Securities of this series, of like tenor,
of authorized denominations and for the same aggregate principal amount, will be
issued to the designated transferee or transferees.

         The Securities of this series are issuable only in registered form
without coupons in denominations of $25 and any integral multiple of $25 in
excess thereof. As provided in the Indenture and subject to certain limitations
therein set forth, Securities of this series are exchangeable for a like
aggregate principal amount of Securities of this series and of like tenor of a
different authorized denomination, as requested by the Holder surrendering the
same.

         No service charge shall be made for any such registration of transfer
or exchange, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in connection therewith.

                                      -7-
<PAGE>

         Prior to due presentment of this Security for registration of transfer,
the Company, the Indenture Trustee and any agent of the Company or the Indenture
Trustee may treat the Person in whose name this Security is registered as the
owner hereof for all purposes, whether or not this Security be overdue, and
neither the Company, the Indenture Trustee nor any such agent shall be affected
by notice to the contrary.

         The Company and, by its acceptance of this Security or a beneficial
interest therein, the Holder of, and any Person that acquires a beneficial
interest in, this Security agree that for United States Federal, state and local
tax purposes it is intended that this Security constitute indebtedness.

         THIS SECURITY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE COMMONWEALTH OF MASSACHUSETTS.

                                      -8-<PAGE>

                                                                     Exhibit 4-d

                                 TRUST AGREEMENT
                                       OF
                            SEACOAST CAPITAL TRUST I

         This TRUST AGREEMENT, dated as of April 9, 2002, between Seacoast
Financial Services Corporation, a Massachusetts corporation, as "Depositor" and
Kevin G. Champagne and Francis S. Mascianica, Jr. as "Regular Trustees" and
Christiana Bank & Trust Company as "Trustee" (the Trustee and the Regular
Trustees together, the "Trustees"). The Depositor and the Trustees hereby agree
as follows:

         1. The trust created hereby shall be known as Seacoast Capital Trust I,
in which name the Trustees, or the Depositor to the extent provided herein, may
conduct the business of the trust, make and execute contracts, and sue and be
sued.

         2. The depositor hereby assigns, transfers, conveys and sets over to
the Trustees the sum of $10. The Trustees hereby acknowledge receipt of such
amount in trust from the Depositor, which amount shall constitute the initial
trust estate. The Trustees hereby declare that they will hold the trust estate
in trust for the Depositor. It is the intention of the parties hereto that the
trust created hereby constitute a business trust under Chapter 38 of Title 12 of
the Delaware Code, 12 Del. C. Section 3801 et seq. (the "Business Trust Act"),
and that this document constitutes the governing instrument of the trust. The
Trustee is hereby authorized and directed to execute and file a certificate of
trust with the Delaware Secretary of State in accordance with the provisions of
the Business Trust Act.

         3. The Depositor and the Trustees will enter into an amended and
restated Trust Agreement, satisfactory to each such party and substantially in
the form to be included as an exhibit to the 1933 Act Registration Statement (as
defined below), to provide for the contemplated operation of the trust created
hereby and the issuance of the Preferred Securities and Common Securities
referred to therein. Prior to the execution and delivery of such amended and
restated Trust Agreement, the Trustees shall not have any duty or obligation
hereunder or with respect to the trust estate, except as otherwise required by
applicable law or as may be necessary to obtain prior to such execution and
delivery any licenses, consents or approvals required by applicable law or
otherwise.

         4. The Depositor, as the sponsor of the trust, is hereby authorized to
file with the Securities and Exchange Commission (the "Commission") and execute,
in each case on behalf of the trust (a) the Registration Statement on Form S-3
(the "1933 Act Registration Statement"), including any pre-effective or
post-effective amendments to such 1933 Act Registration Statement (including the
prospectus and the exhibits contained therein), relating to the registration
under the Securities Act of 1933, as amended, of the Preferred Securities of the
trust and certain other securities and any other necessary documents relating
thereto and (b) a Registration Statement on Form 8-A (the "1934 Act Registration
Statement") (including all pre-effective and post-effective amendments thereto)
relating to the registration of the Preferred Securities of the trust under of
the Securities Exchange Act of 1934, as amended; (ii) to file with one or more
national securities exchange (each, an "Exchange") or the national association
of

                                       1
<PAGE>

securities dealers ("NASD") and execute on behalf of the trust a listing
application or applications and all other applications, statements,
certificates, agreements and other instruments as shall be necessary or
desirable to cause the Preferred Securities to be listed on any such Exchange or
the NASD's Nasdaq National Market; (iii) to file and execute on behalf of the
trust such applications, reports, surety bonds, irrevocable consents,
appointments of attorney for service of process and other papers and documents
as the depositor, on behalf of the trust, may deem necessary or desirable to
register the Preferred Securities under the securities or "blue sky" laws; (iv)
to execute on behalf of the trust such underwriting agreements with one or more
underwriters relating to the offering of the Preferred Securities as the
Depositor, on behalf of the trust, may deem necessary or desirable. In the event
that any filing referred to in clauses (i), (ii) and above is required by the
rules and regulations of the Commission, any Exchange, the NASD or state
securities or Blue Sky laws, to be executed on behalf of the trust by one of the
Trustees, the Depositor and any of the Trustees appointed pursuant to Section 6
hereof are hereby authorized to join in any such filing and to execute on behalf
of the trust any and all of the foregoing.

         5. This Trust Agreement may be executed in one or more counterparts.

         6. The number of Trustees initially shall be three (3) and thereafter
the number of Trustees shall be such number as shall be fixed from time to time
by a written instrument signed by the Depositor which may increase or decrease
the number of Trustees; provided, however, that to the extent required by the
Business Trust Act, one Trustee shall either be a natural person who is a
resident of the State of Delaware or, if not a natural person, an entity which
has its principal place of business in the State of Delaware and otherwise meets
the requirements of applicable Delaware law. Subject to the foregoing, the
Depositor is entitled to appoint or remove without cause any of the Trustees at
any time. Any of the Trustees may resign upon thirty days' prior notice to the
Depositor provided, however, such notice shall not be required if it is waived
by the Depositor.

         7. The Depositor agrees to indemnify each Trustee for, and to hold it
harmless against, any loss, liability or expense (including the reasonable
compensation and the expenses and disbursements of its agents and counsel)
incurred without negligence or bad faith, arising out of or in connection with
the acceptance or administration of this trust or the performance of each such
Trustee's duties hereunder, including the costs and expenses of defending itself
against any claim or liability in connection with the exercise or performance of
any of its powers or duties hereunder.

         8. Christiana Bank & Trust Company, in its capacity as Trustee, shall
not have any of the powers or duties of the Regular Trustees set forth herein
and shall be a Trustee of the trust for the sole purpose of satisfying the
requirements of Section 3807 of the Business Trust Act.

         9. This Trust Agreement shall be governed by, and construed in
accordance with, the laws of the State of Delaware (without regard to conflict
of laws principles).

                                       2

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Trust Agreement
to be duly executed as of the day and year first above written.

                                 SEACOAST FINANCIAL SERVICES
                                 CORPORATION,
                                 as Depositor

                                 By:
                                     ------------------------------------------
                                 Name:  Kevin G. Champagne
                                 Title: President and Chief Executive Officer

                                 CHRISTIANA BANK & TRUST COMPANY,
                                 as Trustee

                                 By:
                                     ------------------------------------------
                                 Name:
                                 Title:

                                 By:
                                     ------------------------------------------
                                 Name:  Kevin G. Champagne,
                                 Title: as Regular Trustee

                                 By:
                                     ------------------------------------------
                                 Name:  Francis S. Mascianica, Jr.,
                                 Title: as Regular Trustee

                                       3
<PAGE>

                              CERTIFICATE OF TRUST
                                       OF
                            SEACOAST CAPITAL TRUST I

         This Certificate of Trust of Seacoast Capital Trust I (the "Trust"),
dated April 9, 2002, is being duly executed and filed by the undersigned, as
trustees, to form a business trust under the Delaware Business Trust Act (12 C.
Section 3801 et seq.).

         1. NAME.

            The name of the business trust being formed hereby is Seacoast
Capital Trust I.

         2. DELAWARE TRUSTEE.

            The name and business address of the trustee of the Trust with a
principal place of business in the State of Delaware is Christiana Bank & Trust
Company, 1314 King Street, Wilmington, Delaware 19801.

         3. EFFECTIVE DATE.

            This Certificate of Trust shall be effective upon its filing with
the Secretary of State of the State of Delaware.

                  [Remainder of Page Intentionally Left Blank]

                                       4
<PAGE>

         IN WITNESS WHEREOF, the undersigned, being the initial trustees of the
trust, have executed this certificate of Trust as of the date first above
written.

                                          CHRISTIANA BANK & TRUST COMPANY,
                                          as Trustee

                                          By:
                                              ---------------------------------
                                          Name:
                                          Title:

                                          By:
                                              ---------------------------------
                                          Name:  Kevin G. Champagne
                                          Title: as Regular Trustee

                                          By:
                                              ---------------------------------
                                          Name:  Francis S. Mascianica, Jr.
                                          Title: as Regular Trustee

                                       5

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