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 goal of a gift letter is to provide the lender with proof of where the funds came from.Sample of a Gift Letter. Used when getting a new mortgage and getting a gift from family. The following templates include all the necessary verbiage for a gift letter and should satisfy most lenders. 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 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. Use our mortgage gift letter template and write yours. While the gift letter is the main document, your client may also need to provide additional documentation. How do I write a letter for a gift money mortgage?