Exhibit 99.5




                            CERTIFICATION PURSUANT TO
            SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



Pursuant to Section 1350, Chapter 63 of Title 18, United States Code, as adopted
pursuant to Section 906 of the Sarbanes-Oxley  Act of 2002, the undersigned,  as
an executive  officer of the chairman of Allmerica  Financial  Corporation  (the
"Company"), does hereby certify that to the undersigned's knowledge:

1)   the Company"s  Quarterly Report on Form 10-Q for the period ended March 31,
     2003 (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 Company's Report fairly presents,  in all
     material respects, the financial condition and results of operations of the
     Company.


                           /s/ Robert P. Restrepo, Jr.
                           ---------------------------
                             Robert P. Restrepo, Jr.
                        Executive Officer of the Chairman


Dated: May 14, 2003

A signed  original of this  written  statement  required by Section 906 has been
provided to Allmerica  Financial  Corporation  and will be retained by Allmerica
Financial Corporation and furnished to the Securities and Exchange Commission or
its staff upon request.