INSURED MUNICIPALS INCOME TRUST 124TH INSURED MULTI SERIES, 497J, 1999-09-29

INSURED MUNICIPALS INCOME TRUST 124TH INSURED MULTI SERIES
497J, 1999-09-29

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                              September 29, 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, 124th Insured Multi-Series
          File No. 33-52176        CIK#891811

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 September 24, 1999.

                                    Very truly yours,




                                    Van Kampen Funds Inc.