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|  Owner:     |  None                                                                    |
|--------------------------------------|-------------------------------------------------------------------------------|
|                                 |                                                                          |
|                                 |                                                                          |
|  Depositor:                     |  Structured      Asset Securities Corporation                            |
|                                 |  Attention:      Mortgage Finance LXS 2007-1                             |
|                                 |  745 7th      Avenue, 7th Floor                                          |
|                                 |  New York,      NY  10019                                           |
|                                 |                                                                          |
|  Master      Servicer:          |  Aurora Loan      Services LLC                                           |
|                                 |  Michele      Olds                                                       |
|                                 |  10350 Park      Meadows Drive                                           |
|                                 |  Littleton, CO      80124                                                |
|                                 |                                                                          |
|  Trustee:                       |  LaSalle Bank,      N.A.                                            |
|                                 |  Attention:      Global Securitization Trust Services Group / LXS 2007-1 |
|                                 |  135 South      LaSalle Street, Suite 1625                               |
|                                 |  Chicago,      IL 60603                                             |
|                                 |                                                                          |
|  Securities      Admin          |                                                                          |
|                                 |                                                                          |
|                                 |                                                                          |
|  Subject:                       |  Annual      Officer's Certification                                     |
|  Fiscal      Year:              |  2007                                                                    |
|  Investor      Code:            |  F99                                                                     |
|  Investor      Name:            |  LXS      2007-1                                                         |

|   |  Certified      by:  |  AURORA LOAN      SERVICES LLC             |
|--------|--------------------------------|-------------------------------------------------|
|   |                           |                                  |
|   |                           |  By /s/ Terry L. Gentry                    |
|   |                           |  Name: Terry L.      Gentry                |
|   |                           |  Title:        Managing Director |

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