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 mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan.A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. 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. The cover letter should include your name, address, and purpose of the gift in one envelope. The lender will likely have a predrafted letter with the relative just needing to fill in a few blanks and sign it. The cover letter should include your name, address, and purpose of the gift in one envelope. Yes. When people give me money, and the amount is more than I can quickly get out of my bank account, 1, I will refuse. This letter will state the amount of the gift or pledge payment credit given to the donor in exchange for the gift.