EXHIBIT 99.4 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 - ----------------------------------------------------------------------- I, Scott A. Wolstein, Chairman of the Board and Chief Executive Officer of Developers Diversified Realty Corporation (the "Company"), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Annual Report on Form 10-K of the Company for the period ended December 31, 2002 which this certification accompanies 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 Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Scott A. Wolstein - --------------------- Scott A. Wolstein Chairman of the Board and Chief Executive Officer March 11, 2003