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.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. The purpose of this letter is to document that the money does not need to be repaid as well as the donor's name, contract information, and relationship 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. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. Sale of asset (like a vehicle). What if I get paid in cash? Fill out income documentation form. This book grew out of a series of letters to my daughter concerning various things—mostly about money and investing—she was not yet quite ready to hear.