The withdrawal slip or bank statement showing the funds leaving the donor's account. The check made out directly to the closing agent.There is no maximum amount of gift funds that can be used on a primary residence. A gift letter for a mortgage is proof to the lender that money you've been given for your home purchase is a gift, not a loan to be repaid. A down payment can be hard to come by. One option is to be gifted the money, but this has certain requirements, such as a gift letter. How much money do you need to receive before a gift letter is necessary? Are there limits on gift amounts? This guide explains the rules and requirements for using down payment gifts with an FHA loan, including the gift letter that's required. The lender may require proof that the funds are indeed a gift and not a loan, often in the form of a gift letter.