INSURED MUNICIPALS INCOME TRUST 125TH INSURED MULTI SERIES, 497J, 1999-10-28

INSURED MUNICIPALS INCOME TRUST 125TH INSURED MULTI SERIES
497J, 1999-10-28

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                            October 28, 1999



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549-1004

Attn:  Filing Desk - Stop 1-4

     Re:  Insured Municipals Income Trust, 125th Insured Multi-Series
          File No. 33-52180   CIK #891809

Ladies/Gentlemen:

         In accordance with the provisions of Rule 497(j) of Regulation C under
the Securities Act of 1933 (the "Securities Act") this letter serves to certify
that the most recent amendment to the Post-Effective of the subject Registration
Statement on Form S-6 for the above captioned Trust does not differ from that
which would have been filed pursuant to Rule 497(b) of the Securities Act. The
most recent amendment to the Registration Statement was filed electronically
with the commission on October 25, 1999.

                                    Very truly yours,




                                    Van Kampen Funds Inc.