Document:

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                                                                     Exhibit 4.0

<Table>
<S>                                 <C>                                                      <C>
  [SEAL]                                                                                                  [SEAL]

                                                FIRST UNITED STATES CORPORATION
                                     INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

COMMON STOCK                                                                                  SEE REVERSE FOR CERTAIN DEFINITIONS

</Table>

THIS
CERTIFIES
that

is the owner of

    FULLY PAID AND NON-ASSESSABLE SHARES OF THE $.001 PAR VALUE COMMON STOCK

transferable only on the books of the Corporation by the holder hereof in
person or by a duly authorized attorney upon surrender of this certificate
properly endorsed. This certificate is not valid until countersigned by the
Transfer Agent. This certificate and the shares represented hereby are issued
and shall be held subject to all of the provisions of the Certificate of
Incorporation and By-Laws of the Corporation and all amendments thereto,
copies of which are on file with the Transfer Agent, to all of which the
holder of this certificate, by acceptance hereof, assents.
     IN WITNESS WHEREOF, the Corporation has caused this certificate to be
signed by the facsimile signatures of its duly authorized officers and to be
sealed with the facsimile seal of the Corporation.

<Table>
<S>                             <C>                               <C>
                                  CORPORATE
                                    SEAL

                                    2003
                                  DELAWARE

SECRETARY                                                          CHAIRMAN

</Table>

         -C-  SECURITY-COLUMBIAN     UNITED STATES BANKNOTE CORPORATION

<Page>

                        FIRST UNITED STATES CORPORATION

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<Table>
<S>                                                                    <C>
     TEN COM -- as tenants in common                                    UNIF GIFT MIN ACT -- ______________ Custodian ___________
     TEN ENT -- as tenants by the entireties                                                     (Cust)                 (Minor)
     JT TEN  -- as joint tenants with right                                                  under Uniform Gifts to Minors
                of survivorship and not as                                                   Act ________________________________
                tenants in common                                                                           (State)
</Table>

   Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED, ______________ hereby sells, assigns and transfers unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
   IDENTIFYING NUMBER OF ASSIGNEE
---------------------------------------

---------------------------------------

_______________________________________________________________________________
   (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE,
                                 OF ASSIGNEE)

_______________________________________________________________________________

_______________________________________________________________________________

________________________________________________________________________ Shares
of the common stock represented by the within Certificate and does hereby
irrevocably constitute and appoint

______________________________________________________________________ Attorney
to transfer the said stock on the books of the within-named Corporation with
full power of substitution in the premises.

Dated _____________________   _________________________________________________
                              NOTICE: The signature to this assignment must
                              correspond with the name as written upon the
                              face of the Certificate in every particular,
                              without alteration or enlargement or any change
                              whatever.

THESE SECURITIES SHALL BE PROMPTLY DEPOSITED INTO AN ESCROW ACCOUNT UNTIL THE
CLOSING OF THE COMPANY'S INITIAL PUBLIC OFFERING OF SECURITIES AND THE
CLOSING OF A BUSINESS COMBINATION, SUCH AS A MERGER OR ACQUISITION.

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
INVESTMENT PURPOSES ONLY AND MAY ONLY BE SOLD, TRANSFERRED OR ASSIGNED
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF
1933, AS AMENDED, OR AN EXEMPTION THEREFROM, AND PURSUANT TO APPLICABLE STATE
SECURITIES LAW.<Page>

                                                                     Exhibit 4.1

<Table>
<S>                              <C>                                                                                  <C>
NUMBER                                      FIRST UNITED STATES CORPORATION                                           Warrant(s)

                                 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                       REDEEMABLE COMMON STOCK PURCHASE WARRANT
</Table>

THIS CERTIFIES THAT, for value received,

is the Registered Holder of a Redeemable Common Stock Purchase Warrant
("Warrant") that entitles its Registered Holder to purchase one share of
Common Stock, $.001 par value, of First United States Corporation ("Company")
for each Warrant set forth above at a price of $1.10 per share (subject to
adjustment) from                   , 2004 (90 days from the efective date of
the Company's initial public offering of securities) until                    ,
2008, unless extended by the Company, all as more particularly described in,
and subject to the terms and conditions contained in the Warrant Agreement,
dated               , 2003 between the Company and Continental Stock
Transfer & Trust Company as Warrant Agent. A copy of the Warrant Agreement
may be obtained by any registered holder, without cost, upon written request
to the Warrant Agent or the Company. This Warrant shall be governed by the
laws of the State of Delaware.

     This Warrant may be exercised to purchase Common Stock only in accordance
with its terms, which include the completion and execution of the "Exercise
Agreement" appearing on the reverse side hereof for a written exercise
instrument of comparable substance and delivery thereof, with payment as
provided, to the principal office of the Warrant Agent.

     The Warrants are redeemable by the Company for $.05 per Warrant, at any
time after           , 2004, upon thirty (30) days' prior written notice, if the
average closing price or bid price of the Common Stock, as reported by the
principal exchange on which the Common Stock is traded, The Nasdaq Stock
Market, Inc. or the National Quotation Bureau, Incorporated, as the case may
be, equals or exceeds $7.00 per share, for any thirty (30) consecutive
trading day period ending no more than 15 days prior to the date that the
notice of redemption is mailed. Upon thirty (30) days' written notice to
all holders of the Warrants, the Company shall have the right to reduce the
exercise price and/or extend the term of the Warrants.

     This Warrant is registered on the books of the Company as maintained on
its behalf by the Warrant Agent, and is transferable only by surrender
thereof at the principal office of the Warrant Agent, duly endorsed for
assignment as reflected on the reverse side hereof or otherwise accompanied
by a duly executed written instrument of assignment or transfer. This
certificate is not valid unless countersigned by the Warrant Agent.

     WITNESS, the facsimile seal of the Company and the facsimile signatures
of its duly authorized officers.

Dated

<Table>
<S>                             <C>                               <C>
                                  CORPORATE
                                    SEAL

                                    2003
                                  DELAWARE

SECRETARY                                                          CHAIRMAN

</Table>

<Page>

                       FIRST UNITED STATES CORPORATION

                             EXERCISE AGREEMENT
      To Be Executed by the Registered Holder in Order to Exercise Warrants

    The undersigned Registered Holder, pursuant to the provisions of the
within Warrant, hereby subscribes for and purchases ________________ shares
of Common Stock covered by such Warrant and herewith makes full cash payment
of $ __________________ for such Warrant Stock at the Exercise Price per
share provided by such Warrant.

Dated: _____________________________   _______________________________________
                                                    (Signature)

____________________________________   _______________________________________
       (Address for Delivery)                    (Print or type name)

____________________________________

____________________________________

                               ASSIGNMENT FORM
      To Be Executed by the Registered Holder in Order to Transfer Warrants

    FOR VALUE RECEIVED, the undersigned Registered Holder hereby sells,
assigns, and transfers all of the rights of the undersigned under and to the
within Warrant with respect to the number of shares of Common Stock covered
thereby set forth below, unto the Assignee identified below, and does hereby
irrevocably constitute and appoint _____________________________ to effect
such transfer of rights on the books of the Company, with full power of
substitution:

<Table>
<Caption>
Name of Assignee                Address of Assignee             No. of Warrants
----------------                -------------------             ---------------
<S>                        <C>                             <C>

</Table>

Dated: _____________________________      ____________________________________
                                             (Signature of Registered Holder)

                                          ____________________________________
                                                 (Print or type name)

     NOTICE: The signature(s) of the Registered Holder above must correspond
with the name as written upon the face of the within Warrant, or upon the
Assignment thereof if applicable, in every particular, without alteration,
enlargement or any change whatsoever, and must be guaranteed by an Eligible
Guarantor Institution which is a participant in a securities transfer
association recognized program, having an office or correspondent in New
York, New York.

                             SIGNATURE GUARANTEE
               (Required for each Exercise or Assignment)

Authorized Signature: ________________________________________________________

Name of Bank or Firm: ________________________________________________________

Dated: _______________________________________________________________________

THESE SECURITIES SHALL BE PROMPTLY DEPOSITED INTO AN ESCROW ACCOUNT UNTIL THE
CLOSING OF THE COMPANY'S INITIAL PUBLIC OFFERING OF SECURITIES AND THE
CLOSING OF A BUSINESS COMBINATION, SUCH AS A MERGER OR ACQUISITION.

THIS WARRANT HELD IN THE ESCROW ACCOUNT MAY BE EXERCISED OR CONVERTED IN
ACCORDANCE WITH ITS TERMS; PROVIDED, HOWEVER, THAT SECURITIES RECEIVED UPON
EXERCISE OR CONVERSION, TOGETHER WITH ANY CASH OR OTHER CONSIDERATION PAID IN
CONNECTION WITH THE EXERCISE OR CONVERSION, ARE PROMPTLY DEPOSITED INTO THE
ESCROW ACCOUNT.

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
INVESTMENT PURPOSES ONLY AND MAY ONLY BE SOLD, TRANSFERRED OR ASSIGNED
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF
1933, AS AMENDED, OR AN EXEMPTION THEREFROM, AND PURSUANT TO APPLICABLE STATE
SECURITIES LAW.

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