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. 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 short letter like this sample gift letter will cover all of the requirements your lender needs. As a general rule, lenders will want you to explain any gift you receive that's over half the value of your total household monthly income. Mortgage gift letters tell the lender that money for your loan came from a gift. Lenders require gift letters when necessary. Your lender may provide you with a template of what they want the letter to include. This will likely include: Mortgage gift letter template. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. Mortgage Gift letter is what the donor of the gift writes to the lender stating that he has offered a gift of money to the home buyer.