EXHIBIT 99.1 CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER OF IOS CAPITAL, LLC PURSUANT TO 18 U.S.C. SECTION 1850 We certify that, to the best of our knowledge and belief, the Quarterly Report on Form 10-Q of IOS Capital, LLC for the period ending March 31, 2003: (1) 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 IOS Capital, LLC. /s/ Russell S. Slack /s/ Harry G. Kozee - ---------------------- ----------------------------- Russell S. Slack Harry G. Kozee President (Principal Executive Officer) Vice President - Finance (Principal May 15, 2003 Financial Officer) May 15, 2003