If you are claiming an exemption other than a gift, use Form DTF-803 instead. Use this form to certify sale price for sales tax calculation when vehicle, vessel, etc.Is transferred in a casual sale or as a gift. Download. A short letter like this sample gift letter will cover all of the requirements your lender needs. A gift letter must contain the donor's name, the gift's value, confirmation that the gift is not to be repaid, and the donor's signature. Needed to put together a gift letter, basically a Bill of Sale with all the information about what is being gifted. 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.