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 shows your lender that you don't need to repay gift money toward your down payment.Get cash fast from Biltmore Loan and Jewelry, a leading provider of collateral high-value loans in Arizona. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. For information or help, call one of the numbers listed: Phoenix. If you send in additional money with your return, include that amount on line 85. Enter the amount you want to donate on line 71. A budget is a roadmap to plan your finances and keep track of where your money goes. Budgeting is a helpful tool whether you're working hard to make ends meet.