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. 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.You can use gifted funds to make a down payment, but your mortgage lender will want to know some details before they allow you to use it. The most important document required is a gift letter. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. Use our mortgage gift letter If you go through a bank they will provide the gift letter form to you to get completed. If someone provides a handwritten letter it is filed away. To use gift funds, you must provide a gift letter proving the money is not a loan. A gift letter for a mortgage is a written statement confirming funds given to a borrower for a down payment are a gift rather than a loan.