ANNUAL CERTIFICATION FOR
                     HOME MORTGAGE PURCHASE PROGRAM
       PURSUANT TO THE SALE, SERVICING AND ADMINISTRATION AGREEMENT

PROGRAM NAME: HSI ASSET LOAN OBLIGATION TRUST 2007-WF1

In accordance with the above referenced Agreement, I, the undersigned,
hereby certify as to each Mortgage Loan being serviced by the below named
institution that as of the preceding certification date of the Agreement:

    1.  I am an "Officer" as defined in the above referenced Agreement, and
        am empowered and authorized to issue this Annual Certification.

    2.  All taxes, ground rents and assessments for the Mortgages covered
        herein have been paid.

    3.  All insurance premiums for flood or other casualty insurance; and FHA
        premiums or Private Mortgage Insurance premiums on conventional loans
        have been paid, all policies as required by the Agreement are in full
        force. Servicer is in full compliance with the Private Mortgage
        Insurance automatic termination provisions of the Homeowners
        Protection Act of 1998, the American Homeownership and Economic
        Opportunity Act of 2000, and Fannie Mae servicing guidelines where
        applicable.

    4.  Inspections have been made monthly on all delinquent, foreclosed or
        otherwise vacant properties, and any other property the Servicer has
        reason to believe requires an inspection.

    5.  Analysis has been made to ensure sufficient moneys are being
        collected in escrow for the current year.

    6.  All information returns have been provided to the Internal Revenue
        Service as required on activity relating to the relevant Mortgage
        Loans.

    7.  If Servicer originates mortgage loans for delivery to investor under
        the referenced Agreement or services mortgage loans under the
        referenced Agreement that are registered with MERS, the Servicer has
        remained a member of MERS in good standing during this Annual
        Certification period.

    8.  There is no outstanding or threatened litigation regarding predatory
        lending practices pertaining to any loans serviced under this
        Program.

I further certify:

    A.  To the best of my knowledge and upon reasonable investigation, the
        servicing of the Mortgage Loans during the year preceding the last
        certification date of the Agreement has been conducted in compliance
        with the Agreement except for such exceptions as I am setting forth
        below.

EXCEPTIONS (if any):---------------------------------------------------------

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    B.  A review of activities with respect to performance under the
        Agreement during the year preceding the last certification date of
        the Agreement has been made under my supervision and to the best of
        my knowledge, based on such review, no default exists as of the above
        date in the fulfillment of any obligations under the Agreement other
        than the events of default, if any, which I am listing below with the
        nature and status thereof.

EVENTS OF DEFAULT (if any):--------------------------------------------------

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NAME OF SERVICING INSTITUTION:         WELLS FARGO BANK, NA I

NAME OF AUTHORIZED OFFICER:            Connie L. Dunn

SIGNATURE OF SAME OFFICER:             /s/ Connie L. Dunn
                                       --------------------------------------

TITLE OF SAME OFFICER:                 Vice President

DATE OF SIGNATURE:                     1-28-08

CERTIFICATION COVERS PERIOD:           FROM: January 01, 2007
                                       TO:   January 01, 2008