Exhibit 99-12

                        CERTIFICATION OF PERIODIC REPORT

I, David E. Meador, Senior Vice President and Chief Financial Officer of DTE
Energy Company (the "Company"), certify, pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of my
knowledge and belief:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly 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 (15 U.S.C. 78m
    or 78o(d)); and

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

Dated: May 14, 2003                             /s/ DAVID E. MEADOR
                                       -----------------------------------------
                                                  David E. Meador
                                       Senior Vice President and Chief Financial
                                            Officer of DTE Energy Company