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 gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. A mortgage gift letter is a simple but essential document that assures lenders the funds you received are a gift, with no repayment expected. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. Mortgage gift letters tell the lender that money for your loan came from a gift. Lenders require gift letters when necessary. A gift letter should include the name and contact information of the donor and a statement that no repayment is expected. How to write a gift letter. Below is a template for a gift letter, useful when family or friends want to help you with a loan downpayment.