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. The person who gave you the money must write and sign the gift letter as well as provide their personal information.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. Filling out a gift letter in OP's case would actually be mortgage fraud. Upvote A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. Learn about gift letter requirements This guide explains how to document gift funds for a mortgage and meet lender requirements. A gift letter is a way for lenders to verify that the person giving you money for a mortgage isn't involved in the home purchase. A mortgage gift letter is a simple but essential document that assures lenders the funds you received are a gift, with no repayment expected.