The letter must explain who is gifting the money, where the donor's funds are coming from and the relationship between the donor and the recipient. Affidavit of Motor Vehicle Gift Transfer.Download the following gift letter template. Then, complete, e-sign, and send it to the lender. Everyone will appreciate any kind of gift. Download and use these best gift letter templates. A gift letter is a note from the donor that says you don't have to repay the money. The gift tax is the responsibility of the eligible person receiving the motor vehicle.