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. Gift Letter For Mortgage Template.Your lender might give you a template to follow if you tell them you're using a gift for your down payment. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. This guide explains how to document gift funds for a mortgage and meet lender requirements. A gift letter is an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. Here's a sample gift letter you can use to prove that the money is truly meant as an outright gift, with no expectation of repayment. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. Use these stepbystep instructions for accepting a cash downpayment gift on a home, including a readytouse mortgage gift letter template.