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. A mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan.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 short letter like this sample gift letter will cover all of the requirements your lender needs. 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. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. Transfer property or money to someone with our revocable or irrevocable Gift Deed template. It's tailored to your state's laws. In the hall below was a letter-box too small to hold a letter.