EXHIBIT 3 ACKNOWLEDGMENT AND AGREEMENT TO TENDER UNITS OF LIMITED PARTNERSHIP UNITS OF SHELTER PROPERTIES IV (THE "PARTNERSHIP") PURSUANT TO AN OFFER TO PURCHASE DATED MAY 8, 2002 (THE "OFFER DATE") BY AIMCO PROPERTIES, L.P....Acknowledgment and Agreement • May 8th, 2002 • Aimco Properties Lp • Operators of apartment buildings
