MFS UNION STANDARD TRUST, 497J, 1997-01-31

MFS UNION STANDARD TRUST
497J, 1997-01-31

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                            MFS UNION STANDARD TRUST
               500 Boylston Street Boston Massachusetts 02116-3741
                                  617 954 5000




                                            January 31, 1997



VIA EDGAR

Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, NW
Washington, DC  20549

         Re:  MFS Union  Standard  Trust (the  "Trust")  (File No.  33-6831)
              on behalf of MFS Union Standard Equity Fund (a series of MFS Union
              Standard Trust)

Ladies and Gentlemen:

         Pursuant to Rule 497(j) under the  Securities  Act of 1933, as amended,
please accept this letter as certification  that the Prospectus and Statement of
Additional  Information  for the Trust does not differ  from that  contained  in
Post-Effective  Amendment No. 5 (the  "Amendment")  to the Trust's  Registration
Statement on Form N-1A. This Amendment was filed  electronically  on January 28,
1997.

         Please  call the  undersigned  or Mary F.  Muller at (617)  954-5000 or
(800) 343-2829 with any questions you may have.

                                            Very truly yours,


                                            JAMES R. BORDEWICK, JR.
                                            James R. Bordewick, Jr.
                                            Assistant Secretary

JRB/bjn