EXHIBIT 3 ACKNOWLEDGMENT AND AGREEMENT TO TENDER UNITS OF LIMITED PARTNERSHIP UNITS OF CENTURY PROPERTIES FUND XVIII (THE "PARTNERSHIP") PURSUANT TO AN OFFER TO PURCHASE DATED MAY 7, 2002 (THE "OFFER DATE") BY AIMCO PROPERTIES, L.P. FOR INFORMATION OR...Acknowledgment and Agreement to Tender Units of Limited Partnership • May 7th, 2002 • Aimco Properties Lp • Operators of apartment buildings
