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 mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan."Streamline your mortgage process using our customizable Gift Letter for Mortgage template. 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 mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. What should you include in a gift letter? What should you include in a gift letter? It states how much you're getting and from whom. Gift funds may not be contributed from any source that has an interest in the sale of the property (seller, builder, real estate agent, etc.). A lender will require a gift letter if you are using money that was given to you.