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. Sample of a Gift Letter.Used when getting a new mortgage and getting a gift from family. A short letter like this sample gift letter will cover all of the requirements your lender needs. You can use gifted funds to make a down payment, but your mortgage lender will want to know some details before they allow you to use it. A gift letter for a mortgage is proof to the lender that money you've been given for your home purchase is a gift, not a loan to be repaid. The following templates include all the necessary verbiage for a gift letter and should satisfy most lenders. The gift donor may not be a person or entity with an interest in the sale of the property such as the seller, real estate agent, builder, or developer. If their gift is too large, they may have to fill out a gift tax form when filing returns. The Mortgage Gift Letter Form acts as evidence of the donor's capability to grant the specified gift funds.