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 is a legal, written statement your lender may require if you're gifted cash to buy a home.A short letter like this sample gift letter will cover all of the requirements your lender needs. What is a gift letter? A gift letter is a document that certifies the funds you're receiving for your down payment are a gift, not a loan. I have requested a transfer of ______ shares of ______ stock, or approximately. 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. The person who gives you the funds will be required to provide bank statements in addition to a gift letter to verify were the money originated. This guide explains how to document gift funds for a mortgage and meet lender requirements. How to write a gift letter.