8-K 1 a31444.txt CREDIT SUISSE FIRST BOSTON MORTGAGE 8-K 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): September 25, 2001 CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP. ------------------------------------------------------ (Exact name of registrant as specified in its charter) Delaware 333-61840 13-3320910 ------------------------------- ------------- ------------------------------------ (State or Other Jurisdiction of (Commission (I.R.S. Employer Identification No.) Incorporation) File Number) 11 Madison Avenue New York, New York 10010 ------------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code (212) 325-2000 ----- --------

-------------------------------------------------------------------------------- Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. ------------------------ (a) Not applicable. (b) Not applicable. (c) Exhibits: 5.1 Legality Opinion of Sidley Austin Brown & Wood LLP. 8.1 Tax Opinion of Sidley Austin Brown & Wood LLP (included in Exhibit 5.1) 23.1 Consent of Sidley Austin Brown & Wood LLP (included in Exhibits 5.1 and 8.1)

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP. By:/s/ Helaine Hebble --------------------- Name: Helaine Hebble Title: Vice President Dated: September 25, 2001 Exhibit Index

CSFB MORTGAGE PASS THROUGH CERTIFICATES SERIES 2001 HE20 8-K