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. It states how much you're getting and from whom.From my understanding, giving a gift to parents after they supply a gift and gift letter is fraud regardless of the funds' origins. 2) Donors bank statement as proof of donor's ability to gift funds. A mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan. Here are the top things you need to know when receiving mortgage down payment gift funds. Bonus: download a free gift letter template. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. Here's what your gift letter should include: The donor's name, address and phone number. The donor's relationship to the client.