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. We'll also show you how to write a gift letter with a gift letter template so you can help your donor prepare for underwriting.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. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. 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. Spouses may not file a joint gift tax return. Each individual is responsible to file a Form 709. A gift letter must contain the donor's name, the gift's value, confirmation that the gift is not to be repaid, and the donor's signature. A mortgage gift letter is a simple but essential document that assures lenders the funds you received are a gift, with no repayment expected.