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 shows your lender that you don't need to repay gift money toward your down payment.A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. 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 an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. A gift letter needs to be from the person who gave you the funds, and they need to include information showing the gift doesn't need to be paid back. A gift letter is a piece of legal, written correspondence explicitly stating that money received isn't expected to be repaid. Today's Date: Medi-Cal Access Program. As noted earlier, your bank should provide a gift letter template for you to complete. "A gift letter describes who the person is, their relationship with the borrower, and how they will give the gift check, cash, or transfer.