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PROSPECTUS SUPPLEMENT                       This Prospectus Supplement,        
FOR THE PERIOD ENDING                       filed pursuant to Rule 424(b)(3),  
MAY 31, 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) 323-7826


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


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                         Index to Exhibits is on page 4
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Item 5. Other Events

On or about May 15, 1996, Registrant made available the monthly Investor
Certificateholders' Statement set forth as Exhibit 20.  May 15, 1996 is also
the date on which holders of Class B Certificates received final payment of
principal and interest (the final payment of principal and interest with
respect to the Class A Certificates was made available to the holders of Class
A Certificates on April 15, 1996).  Accordingly, the Trust terminated after
such final payment and no further Monthly Investor Certificateholders'
Statements will be forwarded to Investor Certificateholders.


Item 7.  Financial Statements and Exhibits

(c) Exhibits



Exhibit No.               Description

                       
20                        Monthly Investor Certificateholders' Statement related to the distribution of 
                          May 15, 1996 and reflecting the performance of the Trust during the Due 
                          Period ended in April 1996, that accompanied the final distribution of 
                          principal and interest on May 15, 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 31, 1996





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                                 EXHIBIT INDEX



Exhibit No.      Description
- -----------      -----------
                                                           
20               Monthly Investor Certificateholders' Statement - (May 15, 1996).






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