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. This guide explains how to document gift funds for a mortgage and meet lender requirements.Second, the reason your bank is asking you to provide a gift letter Is that the funds must be verified. What should you include in a gift letter? 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. 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. 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. While the gift letter is the main document, your client may also need to provide additional documentation. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment.