Provide Documentation:​​ Submit the gift letter, bank statements, and transfer confirmation during the mortgage approval process. 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.What should you include in a gift letter? Yes, all lenders will require a gift letter. Although you may have the funds, the lender needs to confirm that you won't have to repay the gift. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. 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.