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.Use our mortgage gift letter A short letter like this sample gift letter will cover all of the requirements your lender needs. • The payment letter must disclose all monthly payments included in the mortgage payment. The purpose of this letter is to document that the money does not need to be repaid as well as the donor's name, contract information, and relationship to you. You can write your own gift funds letter if you wish. There are many mortgage gift letter template options out there to choose from. 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. It also proves the money is a nostrings present, not an additional debt the borrower is responsible for.