Follow the basic instructions on this sample letter to fill out the form, and be sure you understand the fine print. A gift letter from the donor verifies that the money is a gift that does not need to be repaid versus a loan which would need to be repaid.A gift letter is a document stating that any money received from family or friends is a cash gift and not a loan. A couple meeting with a mortgage lender to submit a gift letter. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. Demystify gift letters in NYC real estate. Understand how to document a gift from family or friends for a smoother property transaction. Can my wife get out of a required GIFT LETTER for conventional loans that her and I signed 9 months before the divorce process? Your lender may provide you with a gift letter template. For the mailing address for a supplemental Form 706 or Form 706-NA, see filing estate and gift tax returns.