Ambac Financial (AMBC) 10-Q 2003 Q3 Quarterly report

EXHIBIT 32.2

Certification of CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Ambac Financial Group, Inc. (the “Company”) for the quarter ending September 30, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Thomas J. Gandolfo, as Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Thomas J. Gandolfo
Name:	Thomas J. Gandolfo
Title:	Senior Vice President and Chief Financial Officer
Date:	November 14, 2003