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 is an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you."Streamline your mortgage process using our customizable Gift Letter for Mortgage template. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. 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's how your lender (along with Fannie and Freddie) proves the source of your down payment funds. Use a Texas Gift Deed to give real estate to another person or an entity. Gifting real estate among spouses or family members is fairly common. A gift letter for a mortgage verifies the source of a homebuyer's gifted down payment funds. A gift letter is a written explanation provided to your mortgage lender when someone else gives you money toward a home purchase.