Exhibit 99-8

Certificate Pursuant to Section 1350 of Chapter 63 of Title 18 United States
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         The undersigned officer hereby certifies, as to the Quarterly Report of
Form 10-Q of Exelon Generation Company, LLC for the quarterly period ended March
31, 2003, that (i) the report fully complies with the requirements of section
13(a) or 15(d) of the Securities Exchange Act of 1934, and (ii) the information
contained in the report fairly presents, in all material respects, the financial
condition and results of operations of Exelon Generation Company, LLC.



Date:  May 2, 2003                       /s/ Robert S. Shapard
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                                         Robert S. Shapard
                                         Executive Vice President and
                                         Chief Financial Officer
                                         Exelon Corporation