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. Here's a sample gift letter you can use to prove that the money is truly meant as an outright gift, with no expectation of repayment.We'll also show you how to write a gift letter with a gift letter template so you can help your donor prepare for underwriting. Mortgage gift letters tell the lender that money for your loan came from a gift. Lenders require gift letters when necessary. 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. Second, the reason your bank is asking you to provide a gift letter Is that the funds must be verified. This form is particularly valuable in the context of home buying, where prospective buyers may rely on monetary gifts to bolster their down payment. Close-up of gift details on form. The letter should include the exact dollar amount of the gift and the date of transfer.