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 letter needs to state that the gifter is handing you the money with no expectation of repayment and no interest charged.A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment. Lenders require you to provide some detailed documentation any time a down payment gift is changing hands. It's how your lender (along with Fannie and Freddie) proves the source of your down payment funds. Here's what you need to know about the tax issues of a gift given for buying real estate. It is likely that a gift letter will be required. A family member from out of state is buying a new car so they want to give me their old car. Fees. We accept cash, check, money order, or credit card payments. Proving a gift to the community is more than just saying that it was gifted to both of you, there has to be something more than that.