Structured Asset Securities Corp 2005-S1
SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the followingpersons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title): Date  /s/ E. Todd Whittemore                                                                                                                                                     3/29/06                                                                                                                                                 Aurora Loan Services LLC, as Master Servicer E. Todd Whittemore, Executive Vice President a)    1. Not Applicable. Item 15. Exhibits, Financial Statement Schedules.        2. Not Applicable.       3. Exhibits. b)    See (a) 3 above.c)    Not Applicable. PART IV        31.1 Sarbanes-Oxley Certification        99.3 Annual Statement of Compliance for the year ended December 31, 2005        99.1 Independent Accountant's Servicing Report for the year ended December 31, 2005        99.2 Report of Management as to compliance with minimum servicing standards for the year ended December 31, 2005 a)  Aurora Loan Services LLC, as Master Servicer        99.4 Aggregate Statement of Principal and Interest Distributions to Certificateholders as of December 31,2005 a) Aurora Loan Services LLC, as Servicerb) Chase Home Finance LLC, as Sub-servicer for JPMorgan Chase Bank, N.A.c) Countrywide Home Loans, Inc., as Servicerd) GMAC Mortgage Corporation, as Servicere) JP Morgan Chase Bank, N.A., as Servicerf) Ocwen Loan Servicing, LLC as successor in interest to Ocwen Federal Bank FSB, as Servicerg) Option One Mortgage Corporation, as Servicerh) Wells Fargo Bank, N.A., as Servicer a) Aurora Loan Services LLC, as Servicerb) Chase Home Finance LLC, as Sub-servicer for JPMorgan Chase Bank, N.A.c) Countrywide Home Loans, Inc., as Servicerd) GMAC Mortgage Corporation, as Servicere) JP Morgan Chase Bank, N.A., as Servicerf) Ocwen Loan Servicing, LLC as successor in interest to Ocwen Federal Bank FSB, as Servicerg) Option One Mortgage Corporation, as Servicerh) Wells Fargo Bank, N.A., as Servicer      Exhibit    Index        31.1 Sarbanes-Oxley Certification        99.3 Annual Statement of Compliance for the year ended December 31, 2005        99.1 Independent Accountant's Servicing Report for the year ended December 31, 2005        99.2 Report of Management as to compliance with minimum servicing standards for the year ended December 31, 2005 a)  Aurora Loan Services LLC, as Master Servicer        99.4 Aggregate Statement of Principal and Interest Distributions to Certificateholders as of December 31,2005 a) Aurora Loan Services LLC, as Servicerb) Chase Home Finance LLC, as Sub-servicer for JPMorgan Chase Bank, N.A.c) Countrywide Home Loans, Inc., as Servicerd) GMAC Mortgage Corporation, as Servicere) JP Morgan Chase Bank, N.A., as Servicerf) Ocwen Loan Servicing, LLC as successor in interest to Ocwen Federal Bank FSB, as Servicerg) Option One Mortgage Corporation, as Servicerh) Wells Fargo Bank, N.A., as Servicer a) Aurora Loan Services LLC, as Servicerb) Chase Home Finance LLC, as Sub-servicer for JPMorgan Chase Bank, N.A.c) Countrywide Home Loans, Inc., as Servicerd) GMAC Mortgage Corporation, as Servicere) JP Morgan Chase Bank, N.A., as Servicerf) Ocwen Loan Servicing, LLC as successor in interest to Ocwen Federal Bank FSB, as Servicerg) Option One Mortgage Corporation, as Servicerh) Wells Fargo Bank, N.A., as Servicer         EX-99.4 ACQ AGREEMNT 2 ex994_agg.htm AGGREGATE STATEMENT                Exhibit 99.4  Aggregate Statement of Principal and Interest Distributions toCertificateholders as of December 31,2005 Structured Asset Securities CorporationMortgage Pass-Through CertificatesSeries 2005-S1 Original Beginning Ending Class Balance Balance Principal Interest Loss Balance A1 284,692,000.00 284,692,000.00 198,105,632.65 6,005,661.65 0.00 86,586,367.35 A2 112,151,000.00 112,151,000.00 0.00 3,459,095.54 0.00 112,151,000.00 M1 31,633,000.00 31,633,000.00 0.00 1,037,303.31 0.00 31,633,000.00 M2 29,332,000.00 29,332,000.00 0.00 966,819.50 0.00 29,332,000.00 M3 14,379,000.00 14,379,000.00 0.00 480,040.97 0.00 14,379,000.00 M4 28,757,000.00 28,757,000.00 0.00 1,003,902.99 0.00 28,757,000.00 M5 11,503,000.00 11,503,000.00 0.00 406,440.98 0.00 11,503,000.00 M6 10,640,000.00 10,640,000.00 0.00 416,513.19 0.00 10,640,000.00 M7 10,352,000.00 10,352,000.00 0.00 414,009.59 0.00 10,352,000.00 M8 7,189,000.00 7,189,000.00 0.00 327,100.53 0.00 7,189,000.00 B1 10,352,000.00 10,352,000.00 0.00 519,254.92 0.00 10,352,000.00 B2 5,751,000.00 5,751,000.00 0.00 288,469.38 0.00 5,751,000.00 B3 7,477,000.00 7,477,000.00 0.00 375,045.31 0.00 7,477,000.00 B4 10,927,000.00 10,927,000.00 0.00 548,096.84 0.00 10,927,000.00 P 0.00 0.00 0.00 1,328,537.70 0.00 0.00 X 0.00 0.00 0.00 19,228,479.07 0.00 0.00 R 0.00 0.00 0.00 0.00 0.00 0.00         EX-99.2 BYLAWS 3 ex992_reportofmanagement.txt REPORT OF MANAGEMENT  Exhibit 99.2  -  Report of Management as to compliance with minimum    servicing standards for the year ended December 31, 2005  a)   [Aurora logo]                      Management's Assertion on Compliance           with the Specified Minimum Servicing Standards Set Forth        in the Uniform Single Attestation Program for Mortgage Bankers                              Report of Management  We, as members of management of Aurora Loan Services LLC (the "Company"), are responsible for complying with the servicing standards identified in the attached Exhibit A (the "specified minimum servicing standards" as set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP"). We are also responsible for establishing and maintaining effective internal control over compliance with these specified minimum servicing standards. We have performed an evaluation of the Company's compliance with the specified minimum servicing standards as of November 30, 2005 and for the year then ended. Based on this evaluation, we assert that during the year ended November 30, 2005, the Company complied, in all material respects, with the specified minimum servicing standards.  As of November 30, 2005 and for the year then ended, the Company had in effect a fidelity bond in the amount of $110,000,000 and an errors and omissions policy in the amount of $150,000,000.                                          Very truly yours,    /s/ Rick Skogg Rick Skogg Co-Chief Operating Officer    /s/ Roy Browning Roy Browning Chief Financial Officer    /s/ William Napier William Napier Controller   February 17, 2006       [Aurora logo]               Exhibit A               Specified Minimum Servicing Standards  I.   CUSTODIAL BANK ACCOUNTS       1. Reconciliations shall be prepared on a monthly basis for all custodial         bank accounts and related bank clearing accounts. These reconciliations         shall:          a. be mathematically accurate;          b. be prepared within forty-five (45) calendar days after the cutoff            date. The cutoff date is the date as of which a bank account is            reconciled every month. It may, or may not, coincide with a            prescribed investor reporting date but shall be consistent from            period to period;          c. be reviewed and approved by someone other than the person who            prepared the reconciliation; and          d. document explanations for reconciling items. These reconciling items            shall be resolved within ninety (90) calendar days of their original            identification.       2. Funds of the servicing entity shall be advanced in cases where there is         an overdraft in an investor's or a mortgagor's account.       3. Each custodial account shall be maintained at a federally insured         depository institution in trust for the applicable investor.       4. Escrow funds held in trust for a mortgagor shall be returned to the         mortgagor within thirty (30) calendar days of payoff of the mortgage         loan.  II.   MORTGAGE PAYMENTS        1. Mortgage payments shall be deposited into the custodial bank accounts          and related bank clearing accounts within two (2) business days of          receipt.        2. Mortgage payments made in accordance with the mortgagor's loan          documents shall be posted to the applicable mortgagor records within          two (2) business days of receipt.        3. Mortgage payments shall be allocated to principal, interest, insurance,          taxes or other escrow items in accordance with the mortgagor's loan          documents.        4. Mortgage payments identified as loan payoffs shall be allocated in          accordance with the mortgagor's loan documents.    [Aurora logo]               Exhibit A               Specified Minimum Servicing Standards (continued)  III.  DISBURSEMENTS        1. Disbursements made via wire transfer on behalf of a mortgagor or          investor shall be made only by authorized personnel.        2. Disbursements made on behalf of a mortgagor or investor shall be posted          within two (2) business days to the mortgagor's or investor's records          maintained by the servicing entity.        3. Tax and insurance payments shall be made on or before the penalty or          insurance policy expiration dates, as indicated on tax bills and          insurance premium notices, respectively, provided that such support has          been received by the servicing entity at least thirty (30) calendar          days prior to these dates.        4. Any late payment penalties paid in conjunction with the payment of any          tax bill or insurance premium notice shall be paid from the servicing          entity's funds and not charged to the mortgagor, unless the late          payment was due to the mortgagor's error or omission.        5. Amounts remitted to investors per the servicer's investor reports shall          agree with cancelled checks, or other form of payment, or custodial          bank statements.        6. Unissued checks shall be safeguarded so as to prevent unauthorized          access.  IV.   INVESTOR ACCOUNTING AND REPORTING        1. The servicing entity's investor reports shall agree with, or reconcile          to, investors' records on a monthly basis as to the total unpaid          principal balance and number of loans serviced by the servicing          entity.  V.    MORTGAGOR LOAN ACCOUNTING        1. The servicing entity's mortgage loan records shall agree with, or          reconcile to, the records of mortgagors with respect to the unpaid          principal balance on a monthly basis.        2. Adjustments on adjustable rate mortgage (ARM) loans shall be computed          based on the related mortgage note and any ARM rider.        3. Escrow accounts shall be analyzed, in accordance with the mortgagor's          loan documents, on at least an annual basis.        4. Interest on escrow accounts shall be paid, or credited, to mortgagors          in accordance with the applicable state laws.    [Aurora logo]               Exhibit A               Specified Minimum Servicing Standards (continued)  VI.   DELINQUENCIES        1. Records documenting collection efforts shall be maintained during the          period a loan is in default and shall be updated at least monthly. Such          records shall describe the entity's activities in monitoring delinquent          loans including, for example, phone calls, letters and mortgage payment          rescheduling plans in cases where the delinquency is deemed temporary          (i.e., illness or unemployment).  VII.  INSURANCE POLiCIES        1. A fidelity bond and errors and omissions policy shall be in effect on          the servicing entity throughout the reporting period in the amount of          coverage represented to investors in management's assertion.   b)    [chase logo]  Exhibit I  Management's Assertion Concerning Compliance with USAP Minimum Servicing Standards  March 13, 2006  As of and for the year ended December 31, 2005, Chase Home Finance LLC (the "Company") has complied in all material respects with the minimum servicing standards (the "Standards") set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP"). These Standards are applicable only to the Company's prime and subprime mortgage portfolios.  As of and for this same period, the Company had in effect fidelity bond and errors and omissions policies in the amounts of $250,000,000 and $25,000,000 respectively.    /s/ Kim Greaves                                      /s/ Jim Miller Kim Greaves                                          Jim Miller Senior Vice President                                Senior Vice President Chase Home Finance LLC                               Chase Home Finance LLC    /s/ Scott Powell Scott Powell CEO Chase Home Finance LLC   c)                                             [Countrywide logo]                                           2900 MADERA ROAD                                          SIMI VALLEY, CALIFORNIA 93065-6298                                          (805) 955-1000     Management's Assertion   March 3, 2005   As of and for the year ended December 31, 2005, Countrywide Financial Corporation and subsidiaries, including its wholly-owned subsidiary, Countrywide Home Loans, Inc. ("CHL") and Countrywide Home Loans Servicing, L.P., a wholly-owned subsidiary of CHL, (collectively, the "Company") have complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation for Mortgage Bankers.  As of and for this same period, the Company had in effect a mortgage bankers' (fidelity) bond in the amount of $200 million and an errors and omissions policy in the amount of $100 million and $130 million for the period January 1, 2005 to August 1, 2005 and for the period from August 1, 2005 to December 31, 2005, respectively.    /s/ Steve Bailey Steve Bailey Senior Managing Director and Chief Executive Officer, Loan Administration    /s/ Kevin Meyers Kevin Meyers Managing Director and Chief Financial Officer, Loan Administration   d)            Exhibit 1    GMAC Mortgage [logo]       Management's Assertion Concerning Compliance      with USAP Minimum Servicing Standards    March 21, 2006    As of and for the year ended December 31, 2005, GMAC Mortgage Corporation and its subsidiaries (the "Company") have complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP").  As of and for this same period, the Company had in effect a fidelity bond and errors and omissions policy in the amounts of $350,000,000 and $100,000,000 respectively.      /s/ Jim Hillsman Jim Hillsman Chief Operating Officer GMAC Residential Holding Corp     /s/ Dave Bricker Dave Bricker Chief Financial Officer GMAC Residential Holding Corp    /s/ Tony Renzi Tony Renzi Executive Vice President, National Servicing Administration GMAC Residential Holding Corp   e)   [chase logo]  Management's Assertion Concerning Compliance with USAP Minimum Servicing Standards  March 13, 2006  As of and for the year ended December 31, 2005, JPMorgan Chase Bank, National Association (the "Company") has complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP") solely as they relate to standard VII, Insurance Policies (the "Applicable Standard"). The Company uses subservicing organizations to perform the servicing obligations subject to minimum servicing standards I-VI of USAP.  As of and for the same period, the Company had in effect fidelity bond and errors and omissions policies in the amounts of $250,000,000 and $25,000,000 respectively.  Attached to this Management Assertion are the independent auditors' reports on the subservcing organizations' compliance with the minimum servicing standards related to the servicing obligations performed.    /s/ Kim Greaves     /s/ Jim Miller Kim Greaves                                     Jim Miller Vice President     Vice President JPMorgan Chase Bank, N.A.   JPMorgan Chase Bank, N.A.    /s/ Scott Powell Scott Powell Senior Vice President JPMorgan Chase Bank, N.A.   f)    [Ocwen logo]                 Management Assertion on Compliance with USAP  February 27, 2006  As of and for the year ended December 31, 2005, Ocwen Loan Servicing, LLC ("OLS"), as successor to Ocwen Federal Bank FSB (the "Bank"), except as specifically noted below, has complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's ("MBA's") Uniform Single Attestation Program for Mortgage Bankers ("USAP")    - Standard: Reconciliations shall be prepared on a monthly basis for all     custodial bank accounts and related bank clearing accounts.  These     reconciliations shall be mathematically accurate, be prepared within     forty five (45) calendar days of the cutoff date; be reviewed and approved     by someone other than the persons who prepared the reconciliation; and     document explanations for reconciling items.  These reconciling items     shall be resolved within ninety (90) calendar days of their original     identification.  We have complied with all aspects of this standard with the exception of certain reconciling items which arose during the year ended December 31, 2005 were not cleared within 90 days of their original identification. All items identified were subsequently cleared within 6 months.  As of December 31, 2005, there was exactly 1 reconciling item totaling $431,07 that had not cleared within 90 days of identification.    - Standard: Adjustments on ARM loans shall be computed based on the     related mortgage note and any ARM rider.  Certain ARM loans serviced by OLS were transferred in with incorrect look back date due to errors in prior servicer records.  These certian loans had ARM adjustments shortly after servicing transfer, but prior to OLS receiving the related mortgage documents from the prior servicer.  When OLS received the mortgage documents and these errors were identified, OLS did not adjust the principal and interest payment amount.  OLS has subsequently made adjustments to their procedures when they identify an error in prior servicer data to analyze the affect on the customer's account and make the appropriate adjustment.  As of and for this same period, OLS had in effect a fidelity bond in the amount of $20,000,000 and an errors and omissions policy in the amount of $5,000,000.   /s/ Ronald M. Faris                      /s/ Scott W. Anderson Ronald M. Faris                          Scott W. Anderson President                                Senior Vice President of                                          Residential Assets   /s/ Brian J. LaForest                    /s/ Thomas Vickers Brian J. LaForest                        Thomas Vickers Director of Investor Reporting           Director and Servicing Controller   g)    [Option One Mortgage logo]                                 [H&R Block logo]                             Management Assertion   As of and for the year ended December 31, 2005, Option One Mortgage Corporation Complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers. As of and for this same period, Option One Mortgage Corporation had in effect a fidelity bond and errors and omissions policy in the amounts of $70,000,000 and $10,000,000 respectively.   /s/ Robert E. Dubrish Robert E. Dubrish, Chief Executive Officer   /s/ William L. O'Neill William L. O'Neill, Chief Financial Officer   /s/ Matthew A. Engel Matthew A. Engel, Controller   /s/ Fabiola Camperi Fabiola Camperi, Chief Servicing Officer   h)  [Wells Fargo Home Mortgage. logo]              1 Home Campus                 Des Moines, IA 50328              Assertion of Management of Wells Fargo Home Mortgage,                    a division of Wells Fargo Bank, N.A.    As of and for the year ended December 31, 2005, Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. (the Company) has complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers.  As of and for this same period, the Company had in effect a fidelity bond along with an errors and omissions policy in the amounts of $100 million and $20 million, respectively.     /s/ Michael J. Heid                                           February 21,2006 Michael J. Heid, Division President, Capital Markets, Finance, & Administration Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.   /s/ Franklin R. Codel            February 21,2006 Franklin R. Codel, Executive Vice President, Finance and Corporate Real Estate Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.   /s/ Mary Coffin                   February 21,2006 Mary Coffin, Executive Vice President, Servicing & Post Closing Wells Fargo Home Mortgage, a division of Wells Fargo Bank, NA.   /s/ Cara K. Heiden                   February 21,2006 Cara K. Heiden, Division President, Nat'l Consumer & Institutional Lending Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.     EX-99.3 VOTING TRUST 4 ex993_compliance.txt SERVICER COMPLIANCE  Exhibit 99.3 - Annual Statement of Compliance for the year         ended December 31, 2005  a)  AURORA LOAN SERVICES A Lehman Brothers Company   Via UPS  February 23, 2006   Diana Kenneally U.S. Bank National Association 1 Federal Street, 3rd Floor Boston, MA 02110  RE: SASCO 2005-S1  Annual Officer's Certificate as to Compliance  Dear Ms. Kenneally:  The undersigned Officer certifies the following for the period ending on December 31, 2005:  1. I have reviewed the activities and performance of the Master Servicer during the preceding calendar year under the terms of the Trust Agreements and to the best of this Officer's knowledge, the Master Servicer has fulfilled all of its duties, responsibilities or obligations under the Agreements;  2. Based on said review and to the best of this Officer's knowledge, the Master Servicer is not in default of its obligations under the terms of the Trust Agreements in any material respect, or, if there is a default in the fulfillment of its obligations, a description of each default or failure and the nature and status thereof has been reported to this Officer;  3. To the best of this Officer's knowledge, nothing has arose to lead this Officer to believe that its Servicer has failed to perform any of its duties, responsibilities and obligations under its Servicing Agreement during the preceding calendar year;  4. To the best of this Officer's knowledge, the Servicer is not in default of its obligations under the terms of its Servicing Agreement in any material respect, or, if there is a default in the fulfillment of its obligations, a description of each default or failure and the nature and status thereof has been reported to this Officer;  5. The Master Servicer has received from its Servicer such Servicer's annual certificate of compliance and a copy of such Servicer's annual audit report, in each case to the extent required under the applicable Servicing Agreement, or, if any such certificate or report has not been received by the Master Servicer, the Master Servicer is using its best reasonable efforts to obtain such certificate or report.   Certified By:   /s/ R. Peter Karr R. Peter Karr Senior Vice President Master Servicing Division     EX-99.1 CHARTER 5 ex991_usap.txt INDEPENDENT ACCOUNTANT'S SERVICING REPORT  EXHIBIT 99.1 -  Independent Accountant's Servicing Report for the year                 ended December 31, 2005  a)   [Ernst & Young logo]        Ernst & Young LLP            Phone: (720) 931-4000                             Suite 3300                   Fax:   (720) 931-4444                             370 17th Street              www.ey.com               Denver, Colorado 80202-5663                        Report on Management's Assertion on   Compliance With the Specified Minimum Servicing Standards Set Forth in the           Uniform Single Attestation Program for Mortgage Bankers            Report of Independent Registered Public Accounting Firm   Member Aurora Loan Services LLC  We have examined management's assertion, included in the accompanying report titled Report of Management, that Aurora Loan Services LLC (the Company) complied with the servicing standards identified in Exhibit A (the specified minimum servicing standards) to the Report of Management as set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers (USAP) during the year ended November 30, 2005. Management is responsible for the Company's compliance with these specified minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was made in accordance with standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the specified minimum servicing standards and performing such other procedures as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the specified minimum servicing standards.  In our opinion, management's assertion that the Company complied with the aforementioned specified minimum servicing standards during the year ended November 30, 2005, is fairly stated, in all material respects.                                 /s/ Ernst & Young LLP   February 17, 2006   b)    [PricewaterhouseCoopers LLP logo]  PricewaterhouseCoopers LLP PricewaterhouseCoopers Center 300 Madison Avenue New York NY 10017 Telephone (646) 471 3000 Facsimile (813) 286 6000  Report of Independent Auditors  To the Board of Directors and Stockholder of Chase Home Finance LLC:   We have examined management's assertion about Chase Home Finance LLC's (the "Company") compliance with the minimum servicing standards identified in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP") as of and for the year ended December 31, 2005 included in the accompanying management assertion (see Exhibit I). Management is responsible for the Company's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was made in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the minimum servicing standards and performing such other procedures as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the minimum servicing standards.  In our opinion, management's assertion that the Company complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2005 is fairly stated, in all material respects.  /s/ PricewaterhouseCoopers LLP  March 13, 2006   c)    [KPMG logo]    KPMG LLP              Telephone 213 972 4000   Suite 2000               Fax       213 622 1217   355 South Grand Avenue  Internet  www.us.kpmg.com                 Los Angeles, CA 90071-1568                       Independent Accountants' Report    The Board of Directors Countrywide Financial Corporation:   We have examined management's assertion, included in the accompanying Management Assertion, that Countrywide Financial Corporation and subsidiaries, including its wholly-owned subsidiary, Countrywide Home Loans, Inc. ("CHL") and Countrywide Home Loans Servicing, L.P., a wholly-owned subsidiary of CHL, (collectively, the "Company") complied with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers (USAP) as of and for the year ended December 31, 2005.  Management is responsible for the Company's compliance with those minimum servicing standards.  Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was conducted in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the minimum servicing standards specified above and performing such other procedures as we considered necessary in the circumstances.  We believe that our examination provides a reasonable basis for our opinion.  Our examination does not provide a legal determination on the Company's compliance with the minimum servicing standards.  In our opinion, management's assertion that Countrywide Financial Corporation and subsidiaries, including its wholly-owned subsidiary Countrywide Home Loans, Inc. ("CHL") and Countrywide Home Loans Servicing, L.P., a wholly-owned subsidiary of CHL, complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2005 is fairly stated, in all material respects.                                  /s/ KPMG LLP    March 3, 2006   d)   [PRICEWATERHOUSECOOPERS logo]        PricewaterhouseCoopers LLP       PricewaterhouseCoopers Center       300 Madison Avenue       New York NY 10017       Telephone (646) 471 3000       Facsimile (813) 286 6000              Report of Independent Accountants     To the Board of Directors and Stockholder of GMAC Mortgage Corporation:  We have examined management's assertion about GMAC Mortgage Corporation and its subsidiaries (the "Company") compliance with the minimum servicing standards identified in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP") as of and for the year ended December 31, 2005 included in the accompanying management assertion (see Exhibit I). Management is responsible for the Company's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was performed in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the minimum servicing standards and performing such other procedures as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the minimum servicing standards.  In our opinion, management's assertion that the Company complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2005 is fairly stated, in all material respects.     /s/ PricewaterhouseCoopers LLP    March 21, 2006   e)    [PricewaterhouseCoopers LLP logo]  PricewaterhouseCoopers LLP PricewaterhouseCoopers Center 300 Madison Avenue New York NY 10017 Telephone (646) 471 3000 Facsimile (813) 286 6000   Report of Independent Auditors  To the Board of Directors and Stockholder of JPMorgan Chase Bank, National Association:  We have examined management's assertion about JPMorgan Chase Bank, National Association's (the "Company") compliance with the minimum servicing standards identified in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP") solely as they relate to standard VII, Insurance Policies (the "Applicable Standard"), as of and for the year ended December 31, 2005 included in the accompanying management assertion. Management is responsible for the Company's compliance with the Applicable Standard. Our responsibility is to express an opinion on management's assertion about the Company's compliance, solely as it relates to the Applicable Standard based on our examination. The Company uses subservicing organizations to perform the servicing obligations subject to minimum servicing standards I-VI of USAP. We did not examine the Company's compliance with standards I-VI of USAP and, accordingly, do not express an opinion thereon.  Our examination was made in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, including examining, on a test basis, evidence about the Company's compliance with the Applicable Standard and performing such other procedures as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the Applicable Standard.  In our opinion, management's assertion that the Company complied with the Applicable Standard solely as it relates to standard VII, Insurance Policies, as of and for the year ended December 31, 2005 is fairly stated, in all material aspects.   /s/ PricewaterhouseCoopers LLP  March 13, 2006   f)    [PricewaterhouseCoopers logo]                                                       PricewaterhouseCoopers LLP                                                      222 Lakeview Avenue                                                      Suite 360                                                      West Palm Beach FL 33401                                                      Telephone (561) 832 0038                                                      Facsimile (561) 805 8181               Reports of Independent Certified Public Accountants   To the Board of Directors of Ocwen Loan Servicing, LLC  We have examined management's assertion that Ocwen Loan Servicing, LLC ("OLS"), as successor to Ocwen Federal Bank FSB (the "Bank"), has complied with the minimum servicing standards identified in the Mortgage Bankers Association of America's ("MBA's") Uniform Single Attestation Program for Mortgage Bankers ("USAP") as of and for the year ended December 31, 2005 included in the accompanying Management Assertion on Compliance with USAP.  Management is responsible for OLS's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about OLS's compliance based on our examination.  Our examination was made in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about OLS's compliance with the minimum servicing standards and performing such other procedures as we considered necessary in the circumstances.  We believe that our examination provides a reasonable basis for our opinion.  Our examination does not provide a legal determination on OLS's compliance with the minimum servicing standards.  Our examination disclosed noncompliance with minimum servicing standards related to custodial account reconciliations and adjustments on adjustable rate mortgages applicable to OLS during the year ended December 31, 2005 which is described in the accompanying Management Assertion on Compliance with USAP.  In our opinion, management's assertion that OLS complied with the aforementioned minimum servicing standards, except for noncompliance as described in the accompanying Management Assertion on Compliance with USAP, as of and for the year ended December 31, 2005 is fairly stated, in all material respects.   /s/ PricewaterhouseCoopers LLP  February 27, 2006   g)    [KPMG logo]    KPMG LLP   Suite 2000   355 South Grand Avenue   Los Angeles, CA 90071-1568        Independent Accountant's Report    The Board od Directors and Stockholder Option One Mortgage Corporation:  We have examined management's assertion, included in the accompanying management assertion, that Option One Mortgage Corporation complied with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers as of and for the year ended December 31, 2005. Management is responsible for Option One Mortgage Corporation's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was conducted in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, including examining, on a test basis, evidence about Option One Mortgage Corporation's compliance with the minimum servicing standards specified above and performing such other procedures as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on Option One Mortgage Corporation's compliance with the minimum servicing standards.  In our opinion, management's assertion that Option One MOrtgage Corporation complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2005 is fairly stated in all material respects.            /s/ KPMG LLP   Los Angeles, California February 28, 2006   h)  [KPMG LLP.logo]               KPMG LLP       2500 Ruan Center       666 Grand Avenue       Des Moines, IA 50309                         Independent Accountants' Report    The Board of Directors Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.:   We have examined management's assertion, included in the accompanying Assertion of Management of Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. (the Company), that the Company complied with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers (USAP) as of and for the year ended December 31, 2005. Management is responsible for the Company's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination.  Our examination was conducted in accordance with attestation standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the minimum servicing standards specified above and performing such other procedures, as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the minimum servicing standards.  In our opinion, management's assertion that the Company complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2005 is fairly stated, in all material respects.                                 /s/ KPMG LLP   February 21,2006    EX-31 6 rpt10ksasco2005s1sox.htm SARBANES-OXLEY CERT     rpt10kSOX_ALS           Exhibit 31.1: Sarbanes-Oxley Certification Date I, E. Todd Whittemore, Executive Vice President of Aurora Loan Services LLC., certify that: I have reviewed this annual report on Form 10-K, and all reports on Form 8-K containing distribution or servicing reports filed in respect of periods included in the year covered by this annual report, of Structured Asset Securities CorporationMortgage Pass-Through Certificates2005-S1 ; Based on my knowledge, the information in these reports, taken as a  whole, does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading as of the last day of the period covered by this annual report; Based on my knowledge, the distribution or servicing information required to be provided to the Trustee by the Servicer under the Pooling and Servicing or similar, agreement, for inclusion in these reports is included in these reports; I am responsible for reviewing the activities performed by the master servicer under the pooling and servicing, or similar, agreement, and  based on upon my knowledge and the annual compliance review required under that agreement, and except as disclosed in the reports, the master servicer has fulfilled its obligations under that agreement; and The reports disclose all significant deficiencies relating to the servicer's compliance with the minimum servicing standards based upon the report provided by an independent public accountant, after conducting a review in compliance with the Uniform Single Attestation Program for Mortgage Bankers or similar procedure, as set forth in the pooling and servicing, or similar, agreement, that is included in these reports. In giving the certifications above, I have reasonably relied on information provided to me by the following unaffiliated parties: Title U.S. Bank National Association, as Trustee Signature 1. 2. 3. 4. 5. 3/29/06                                                                                                              /s/ E. Todd Whittemore                                                                                                               Executive Vice President Chase Home Finance LLC, as Sub-servicer for JPMorgan Chase Bank, N.A.Countrywide Home Loans, Inc., as ServicerGMAC Mortgage Corporation, as ServicerJP Morgan Chase Bank, N.A., as ServicerOcwen Loan Servicing, LLC as successor in interest to Ocwen Federal Bank FSB, as ServicerOption One Mortgage Corporation, as ServicerWells Fargo Bank, N.A., as Servicer         -----END PRIVACY-ENHANCED MESSAGE-----