Exhibit (a)(6)

                                  (AIMCO LOGO)

                             AIMCO PROPERTIES, L.P.
                           c/o The Altman Group, Inc.
                                  P.O. Box 238
                              Lyndhurst, NJ 07071
                                 (800) 467-0821

                             AN IMPORTANT REMINDER

                                                               December 10, 2004

Dear Limited Partner:

     We recently mailed you litigation settlement tender offer documents
offering to purchase your units of limited partnership interest in Shelter
Properties IV Limited Partnership for $397.68 per unit in cash, which includes
your final settlement amount of $11.51 per unit. Our offer was made upon the
terms and subject to the conditions set forth in the Litigation Settlement
Offer, dated November 5, 2004, and in the related Letter of Transmittal
(collectively, together with any supplements or amendments, our "Offer").

     WE HAVE FURTHER EXTENDED OUR OFFER UNTIL MIDNIGHT, NEW YORK CITY TIME, ON
DECEMBER 28, 2004, AND HAVE ISSUED A PRESS RELEASE ANNOUNCING THE EXTENSION. Our
Offer was previously scheduled to expire on December 15, 2004.

     Our Offer provides you with an opportunity to:

     - GAIN LIQUIDITY FOR YOUR INVESTMENT WHICH YOU MAY NOT HAVE HAD PREVIOUSLY,
       AND

     - TO ELIMINATE THE COST AND RECORD KEEPING ASSOCIATED WITH LIMITED
       PARTNERSHIP TAX REPORTING.

     If you retain your units, you will continue to be a limited partner. If you
elect to remain in the partnership until termination, you will continue to
participate in the partnership distributions, if any, and the tax effects of the
partnership's results.

     Please remember, that to accept our Offer, you must complete and sign the
enclosed Letter of Transmittal in accordance with its instructions, which must
be received by our information agent, The Altman Group, Inc., by December 28,
2004. If you have already tendered your units, you need not do anything at this
time.

     If you have any questions, please contact the Information Agent, toll free,
at (800) 467-0821.

                                          Sincerely,

                                          AIMCO Properties, L.P.