Within 7 to 10 days after the funeral you should acknowledge those who extended special help, or sent flowers, or made contributions to designated charities. While you may also wish to acknowledge letters of sympathy, it is not necessary to answer notes or cards. Your funeral director may offer you a selection of acknowledgment cards, or you may want to use your personal stationery. It is also proper to acknowledge all those that may have done special favors, the pallbearers and others.