UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported)

June 29, 2007

STRUCTURED ASSET SECURITIES CORPORATION (as Depositor under the Trust Agreement, dated as of June 1, 2007, providing for the issuance of Lehman XS Trust Mortgage Pass-Through Certificates, Series 2007-12N)

Lehman XS Trust, Series 2007-12N

(Issuing Entity)

Structured Asset Securities Corporation

(Exact Name of Depositor as Specified in its Charter)

Lehman Brothers Holdings Inc.

(Exact Name of Sponsor as Specified in its Charter)

Structured Asset Securities Corporation

(Exact Name of Registrant as Specified in its Charter)

Delaware		333-133985		74-2440850
(State or Other Jurisdiction Of Incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

745 Seventh Avenue, 7^th Floor New York, NY		10019
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (212) 526-7000

No Change

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events

Dechert LLP has been retained by this Registrant as counsel for its Registration Statement on Form S-3 (Commission File No. 333-133985) in connection with various transactions. Legal opinions by Dechert LLP to be incorporated into the Registration Statement are attached hereto as Exhibit 5.1, Exhibit 8.1 and Exhibit 23.1.

Item 9.01. Financial Statements and Exhibits

(a)	Not applicable.

(b)	Not applicable.

(c)	Not applicable.

(d) Exhibits:

5.1

Opinion of Dechert LLP as to legality (including consent of such firm).

8.1

Opinion of Dechert LLP as to certain tax matters (including consent of such firm included in Exhibit 5.1).

23.1

Consent of Dechert LLP (included in Exhibit 5.1).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


	STRUCTURED ASSET SECURITIES CORPORATION

	By:	/s/ Michael C. Hitzmann
		Name: Michael C. Hitzmann Title: Senior Vice President

Dated: June 29, 2007

EXHIBIT INDEX

Exhibit No.		Description

5.1		Opinion of Dechert LLP as to legality (including consent of such firm).

8.1		Opinion of Dechert LLP as to certain tax matters (including consent of such firm included in Exhibit 5.1).

23.1		Consent of Dechert LLP (included in Exhibit 5.1).

Lehman XS Trust Series 2007-12N 8-K