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PROSPECTUS SUPPLEMENT                       This Prospectus Supplement,       
FOR THE PERIOD ENDING                       filed pursuant to Rule 424(b)(3), 
APRIL 30, 1996 TO                           relates to Registration Statement 
PROSPECTUS DATED                            No. 33-43136-01 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):  May 15, 1996


                           DISCOVER CARD TRUST 1991 C
                           --------------------------
             (Exact name of registrant as specified in its charter)



                                                                   
Delaware                               0-19735                           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) 323-7184


                               Not Applicable
         -------------------------------------------------------------
         (Former name or former address, if changed since last report)



                                  Page 1 of 14
                         Index to Exhibits is on page 4





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Item 5. Other Events

On May 15, 1996 the Registrant made available the Monthly Certificateholders'
Statement for the Due Period of April 1996, 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 C related to the Due Period ending April 30,
                 1996.






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                                   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 C
                                                (Registrant)
                                       
                                       By:   DISCOVER RECEIVABLES FINANCING
                                             GROUP, INC.
                                             as originator of the Trust
                                       
                                       
                                       By:            Birendra Kumar
                                             ------------------------------
                                             Birendra Kumar
                                             Vice President and Treasurer


Date: May 15, 1996





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                                 EXHIBIT INDEX



Exhibit No.      Description
- -----------      -----------
              
21               Monthly Certificateholders' Statement for Discover Card Trust 1991 C related to the Due Period ending April 30,
                 1996.






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