Exhibit 99-3
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         Certificate Pursuant to Section 1350 of Chapter 63 of Title 18
                               United States Code
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         The undersigned officer hereby certifies, as to the Amended Quarterly
Report on Form 10-Q/A of Exelon Corporation for the quarterly period ended March
31, 2002, 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 Corporation.



Date:  October 30, 2002                     /s/ Ruth Ann M. Gillis
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                                            Ruth Ann M. Gillis
                                            Senior Vice President and Chief
                                             Financial Officer
                                            Exelon Corporation