1 PROSPECTUS SUPPLEMENT This Prospectus Supplement, FOR THE PERIOD ENDING filed pursuant to Rule 424(b)(3), SEPTEMBER 30, 1998 TO relates to Registration Statement PROSPECTUS DATED No. 33-43136-02 and the OCTOBER 8, 1991 Prospectus dated October 8, 1991 SECURITIES AND EXCHANGE COMMISSION 450 Fifth Street, N.W. Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 15, 1998 DISCOVER CARD TRUST 1991 D ------------------------------------------------------ (Exact name of registrant as specified in its charter) Delaware 0-19734 Not Applicable - -------- ------- -------------- (State of (Commission (IRS Employer organization) File Number) Identification No.) c/o Discover Receivables Financing Group, Inc. 12 Read's Way New Castle, Delaware 19720 - ---------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (302) 323-7826 Not Applicable ------------------------------------------------------------- (Former name or former address, if changed since last report) Page 1 of 15 Index to Exhibits is on page 4 2 Item 5. Other Events On October 15, 1998 the Registrant made available the Monthly Certificateholders' Statement for the Due Period of September 1998, which is attached as Exhibit 21 hereto. Item 7. Financial Statements and Exhibits (c) Exhibits Exhibit No. Description 21 Monthly Certificateholders' Statement for Discover Card Trust 1991 D related to the Due Period ending September 30, 1998. 2 3 SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. DISCOVER CARD TRUST 1991 D (Registrant) By: DISCOVER RECEIVABLES FINANCING GROUP, INC. as originator of the Trust By: Richard W. York ------------------------------------- Richard W. York Vice President Date: October 15, 1998 3 4 EXHIBIT INDEX Exhibit No. Description 21 Monthly Certificateholders' Statement for Discover Card Trust 1991 D related to the Due Period ending September 30, 1998. 4