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. Provide Documentation:​​ Submit the gift letter, bank statements, and transfer confirmation during the mortgage approval process.What should you include in a gift letter? A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. The purpose of this letter is to document that the money does not need to be repaid as well as the donor's name, contract information, and relationship to you. Filling out a gift letter in OP's case would actually be mortgage fraud. Upvote To use gift funds, you must provide a gift letter proving the money is not a loan. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. To use gift funds, you must provide a gift letter proving the money is not a loan. A gift letter is a document stating that any money received from family or friends is a cash gift and not a loan.