EXHIBIT 99.2

          CERTIFICATION UNDER SECTION 906 OF THE SARBANES-OXLEY ACT OF
                                      2002

         Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the
undersigned certifies that this periodic report fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934
and that information contained in this periodic report fairly presents, in all
material respects, the financial condition and results of operations of Fair
Isaac Corporation.

         A signed original of this written statement required by Section 906, or
other document authenticating, acknowledging, or otherwise adopting the
signature that appears in typed form within the electronic version of this
written statement required by Section 906, has been provided to Fair Isaac
Corporation and will be retained by Fair Isaac Corporation and furnished to the
Securities and Exchange Commission or its staff upon request.

Date: July 23, 2003                                  /s/  Kenneth J. Saunders
                                                     ------------------------
                                                     Kenneth J. Saunders
                                                     Chief Financial Officer