This guide offers tips for writing acknowledgement letters to families for donations made in memory of a loved one. Pay tribute to a loved one with a gift in honor or in memory of them while helping others in need.Make a contribution today in memory, honor or celebration of a loved one, or to commemorate a special occasion. Check here if this is a memorial donation. Remember to include gift details, such as gift date and gift amount, in your acknowledgment letter to the donor. 3. Gifts in any amount are welcome and with each gift a special acknowledgement letter will be sent to whomever you designate.