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 gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment.A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. A gift letter for a mortgage is a written statement confirming that the gift money you receive from a family member or friend is a gift, not a loan. A mortgage gift letter states that you received money as a genuine gift to use toward a down payment, rather than a loan. A mortgage gift letter is a document that helps satisfy the requirement that a borrower's down payment funds come from legitimate sources. Never give out your personal or financial information and never wire money to persons you don't know! He was living in the village of Sea Cliff, in Nassau County, working as a heart surgeon at NYU Langone Hospital Long Island.