Item 1. Business. Item 1A.
Item 1A. Risk Factors. Item 1B.
Item 1B. Unresolved Staff Comments. Item 2.
Item 2. Properties. Item 3.
Item 3. Legal Proceedings. Item 4.
Item 4. Submission of Matters to a Vote of Security Holders. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Item 5.
Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity
Securities. Item 6.
Item 6. Selected Financial Data. Item 7.
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation. Item 7A.
Item 7A. Quantitative and Qualitative Disclosures About Market Risk. Item 8.
Item 8. Financial Statements and Supplementary Data. Item 9.
Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure. Item 9A.
Item 9A. Controls and Procedures. Item 9B.
Item 9B. Other Information. PART II None. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Item 9A(T). Controls and Procedures. Not Applicable. Item 10.
Item 10. Directors and Executive Officers of the Registrant. Item 11.
Item 11. Executive Compensation. Item 12.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. Item 13.
Item 13. Certain Relationships and Related Transactions. Item 14.
Item 14. Principal Accounting Fees and Services. PART III Not Applicable. Not Applicable. Not Applicable. Not Applicable. Not Applicable.
a) 1. Not Applicable. Item 15.
Item 15. Exhibits, Financial Statement Schedules. 2. Not Applicable. 3. The exhibits filed in response to Item 601 of Regulation S-K are listed in the Exhibit Index. b) See (a) above. c) Not Applicable. PART IV ADDITIONAL ITEMS REQUIRED BY GENERAL INSTRUCTION J Item 1112(b) of Regulation AB. Item 1114(b)(2) of Regulation AB. Item 1117 of Regulation AB. Item 1119 of Regulation AB. Item 1122 of Regulation AB. See Exhibit 33 and Exhibit 34. Servicer Compliance Statement. See Exhibit 35. Significant Obligors of Pool Assets (Financial Information). Item 1115(b) of Regulation AB. Credit Enhancement and Other Support, Except for Certain Derivatives
Instruments (Information Regarding Significant Enhancement
Providers Financial Information). Certain Derivatives Instruments (Financial Information). Legal Proceedings. Affiliations and Certain Relationships and Related Transactions. Compliance with Applicable Servicing Criteria Item 1123 of Regulation AB. Not Applicable. Not Applicable. Not Applicable. Not Applicable. Information required by Item 1119 has been omitted from this annual report on Form 10-K because it is substantially
the same information as has been provided previously in a prospectus timely filed pursuant to Rule 424 promulgated
under the Securities Act of 1933 under the same Central Index Key (CIK) code as this annual report on Form 10-k. Greenpoint Mortgage Funding, Inc.'s report on assessment of compliance with servicing criteria and the related
registered public accounting firm's attestation report identify the following material instances of noncompliance with
the servicing criteria: With respect to Item 1122(d)(1)(i), there were no policies and procedures instituted to monitor
the performance or other triggers and events of defaults in accordance with the transaction agreements; with
respect to Item 1122(d)(2)(iv), the related accounts for each transaction were not maintained as set forth in
agreements; with respect to Item 1122(d)(3)(ii), amounts due to Investors were not remitted in accordance with the
timeframes set forth in transaction agreements.
SIGNATURES By (Signature and Title): Date March 29, 2007 /s/ E. Todd Whittemore E. Todd Whittemore
Executive Vice President, Master Servicing Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following
persons on behalf of the registrant and in the capacities and on the dates indicated. Aurora Loan Services LLC, as Master Servicer Lehman XS Trust, Series 2006-4N
EXHIBIT INDEX EXHIBIT DESCRIPTION Exhibit 31 302 Sarbanes-Oxley Certification
Exhibit 33 Item 1122 Compliance with Applicable Servicing Criteria - Assessments Exhibit 34 Item 1122 Compliance with Applicable Servicing Criteria - Attestations Exhibit 35 Item 1123 Servicer Compliance Statement Exhibit 4 Trust Agreement dated as of March 1, 2006, among Structured Asset Securities Corporation, as Depositor,
Aurora Loan Services LLC, as Master Servicer and U.S. Bank National Association, as Trustee (incorporated
herein by reference from Exhibit 4.1 of the Current Report on Form 8-K of the registrant, as filed with the
Commission on April 14, 2006). Exhibit 10 Incorporated by reference as Exhibit 4. a) Assurant Inc., as Sub-Contractor for Greenpoint Mortgage Funding, Inc.
b) Aurora Loan Services LLC, as Master Servicer
c) Countrywide Home Loans Servicing LP, as Servicer
d) GMAC Mortgage, LLC, as Servicer
e) Greenpoint Mortgage Funding, Inc., as Servicer
f) LandAmerica Tax and Flood Services, Inc., as Sub-Contractor for Greenpoint Mortgage Funding, Inc.
g) U.S. Bank National Association, as Trustee, Paying Agent and Custodian a) Assurant Inc., as Sub-Contractor for Greenpoint Mortgage Funding, Inc.
b) Aurora Loan Services LLC, as Master Servicer
c) Countrywide Home Loans Servicing LP, as Servicer
d) GMAC Mortgage, LLC, as Servicer
e) Greenpoint Mortgage Funding, Inc., as Servicer
f) LandAmerica Tax and Flood Services, Inc., as Sub-Contractor for Greenpoint Mortgage Funding, Inc.
g) U.S. Bank National Association, as Trustee, Paying Agent and Custodian a) Aurora Loan Services LLC, as Master Servicer
b) Countrywide Home Loans Servicing LP, as Servicer
c) GMAC Mortgage, LLC, as Servicer
d) Greenpoint Mortgage Funding, Inc., as Servicer