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. From obtaining gift funds to filling out a gift letter, everything you need to know about mortgage gifts for a home purchase in Florida.So what's the gift letter? This gift is to be applied toward the purchase of the property located at: (Property Address). 3). Down payment gifts assist home purchases. Gift letter confirms no repayment. All gifts must be paper-trailed and digitally documented with cancelled checks and bank statements. (Property Address). 3). Gifts from relatives and domestic partners are an acceptable source for both down payment and closing costs when financing a primary residence or vacation home. A gift letter for a mortgage shows your lender that you don't need to repay gift money toward your down payment.