<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
One Sun Life Executive Park
Wellesley Hills, MA 02481
September 2, 1999
Via Edgar Transmission
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549
Re: Sun Life of Canada (U.S.) Variable Account I of Sun Life Assurance
Company of Canada (U.S.) File No. 333-68601
Ladies and Gentlemen:
Pursuant to Rule 497(j) under the Securities Act of 1933, Sun Life
Assurance Company of Canada (U.S.), on behalf of Sun Life of Canada (U.S.)
Variable Account I (the "Variable Account"), certifies that (1) the form of
the prospectus which would have been filed under paragraph (b) of Rule 497
would not have differed from that contained in the most recent amendment
(Post-Effective Amendment No. 2) to the registration statement of the
Variable Account filed on August 25, 1999 which became effective on
August 25, 1999 (with the public offering commencing on September 1, 1999),
and (2) the text of the most recent amendment to the registration statement
has been filed electronically.
Please contact me at (781) 431-4925 if you have any questions.
Very truly yours,
/s/ Roy P. Creedon
------------------
Roy P. Creedon
Assistant Vice President and Senior Counsel
