This guide explains how to document gift funds for a mortgage and meet lender requirements. Mortgage gift letters tell the lender that money for your loan came from a gift.Lenders require gift letters when necessary. 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. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. Second, the reason your bank is asking you to provide a gift letter Is that the funds must be verified. Gifts from relatives and domestic partners are an acceptable source for both down payment and closing costs when financing a primary residence or vacation home. Complete and send the Stock Donation LETTER OF INTENTION. ALL STOCK DONATIONS MUST BE ACCOMPANIED BY a stock donation Letter of Intention form. Sample Gift Letter to help develop your own in-house gift letter.