Exhibit 35.5

GMAC- RFC

2255 N. Ontario Street Suite # 400

Burbank, CA 91504

Attention: Compliance Officer: Jeb Robinson

Re: Annual Compliance Statement for RALI 2007-QS1

In connection with the loans serviced by SunTrust
Mortgage, Inc. (the Company) pursuant to the Companys Servicing Agreement(s)/Purchase and Sale Agreement(s) with GMAC-RFC and any applicable Reconstitution Agreement(s) (together, the Transaction Agreements), I, the
undersigned officer, hereby certify the following as of December 31, 2007:



| | (i) | The Company conducted a review of its activities during the immediately preceding calendar year (or applicable portion thereof) and of its performance under the Transaction
Agreements during such period has been made under my supervision; and
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| | (ii) | To the best of my knowledge, based on such review, the Company has fulfilled all of its obligations under the Transaction Agreements in all material respects throughout such
calendar year (or applicable portion thereof), except as follows:
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| |  | SunTrust Mortgage did not maintain the required fidelity bond coverage amount in accordance with §229.1122(d)(i)(iv) at all times during 2007. The Company maintained fidelity
bond coverage in the amount of $150MM throughout calendar year 2007, which was determined to be insufficient according to applicable FNMA transaction agreement terms. This deficiency was an issue for limited portions of the year and resulted from an
increase in the volume of the servicing portfolio. SunTrust Mortgage has requested a waiver from FNMA stating this coverage amount is adequate without regard for the size of the residential servicing portfolio, subject to an annual FNMA review. FNMA
has verbally agreed to this request, and SunTrust Mortgage is working to formalize this agreement.
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IN WITNESS WHEREOF,I do hereby certify the foregoing as of the date hereof.



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|SunTrust Mortgage, Inc                             
|                                                   
|/s/ John R. Purcell, Jr.                           
|John R. Purcell, Jr.                               
|Senior Vice President  Manager, Servicing Division
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|Date: March 12, 2008