Exhibit 32

CERTIFICATION

In connection with the Annual Report on Form 10-K of American International Group, Inc. (the “Company”) for the year ended December 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, M.R. Greenberg, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, that:

     (1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, 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/ M.R. GREENBERG   

M.R. Greenberg

Chief Executive Officer

Date: March 15, 2004

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

FORM 10-K : II- 15

CERTIFICATION

In connection with the Annual Report on Form 10-K of American International Group, Inc. (the “Company”) for the year ended December 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Howard I. Smith, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, that:

     (1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, 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/ HOWARD I. SMITH   

Howard I. Smith

Chief Financial Officer

Date: March 15, 2004

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

FORM 10-K : II- 16