A mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan. 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.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. From my understanding, giving a gift to parents after they supply a gift and gift letter is fraud regardless of the funds' origins. Understand what a gift letter is, why you need it for a mortgage, and how to write one effectively to get your home purchase approved. A gift letter is an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. Most importantly, the letter should state that the money is a gift and that there's no expectation of repayment.