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.Yes, this is normal. We bought our first house just before we got married. A gift letter is an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. A gift letter is a piece of legal, written correspondence explicitly stating that money received isn't expected to be repaid. 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. A signed gift letter from her parents. A complete bank statement from her parents showing the withdrawal. James received a dowry of 75,000 Danish dalers and a gift of 10,000 dalers from his mother-in-law, Sophie of Mecklenburg-Güstrow.