Exhibit 32.2 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 I, William H. Schafer, Senior Vice President and Chief Financial Officer of Developers Diversified Realty Corporation (the "Company"), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) The quarterly report on Form 10-Q of the Company for the period ended March 31, 2004 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 quarterly report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ William H. Schafer - --------------------------------------------------- William H. Schafer Senior Vice President and Chief Financial Officer May 10, 2004