MFS UNION STANDARD TRUST, 497J, 1998-02-02

MFS UNION STANDARD TRUST
497J, 1998-02-02

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




                                    February 2, 1998



VIA EDGAR

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

         Re:   MFS  Union  Standard  Trust (the  "Trust") (File  No.  33-68310)
               on  behalf of MFS Union Standard Equity Fund (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 do not  differ  from those  contained  in
Post-Effective  Amendment No. 7 (the  "Amendment")  to the Trust's  Registration
Statement on Form N-1A.  The Amendment was filed  electronically  on January 28,
1998.

         Please  call the  undersigned  or Brett A.  Miguel  at (617)  954-5873
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