Here's a sample gift letter you can use to prove that the money is truly meant as an outright gift, with no expectation of repayment. Mortgage gift letters tell the lender that money for your loan came from a gift.Lenders require gift letters when necessary. 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. A gift letter for a mortgage is proof to the lender that money you've been given for your home purchase is a gift, not a loan to be repaid. It states how much you're getting and from whom. Yes, all lenders will require a gift letter. Although you may have the funds, the lender needs to confirm that you won't have to repay the gift.