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.A gift letter for a mortgage is a written statement confirming that the gift money you receive from a family member or friend is a gift, not a loan. A mortgage gift letter states that you received money as a genuine gift to use toward a down payment, rather than a loan. 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 A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. The letter needs to indicate that the money is a gift and not actually a loan you must pay back. The letter should state that the person giving you the money is not getting something of value in return, such as an ownership stake in the property. It is less important for the recipient to sign the letter, as it is primarily focused on confirming that the donor does not expect to receive their money back.