Because Massachusetts has not enacted a gift tax, the lifetime transfer of property without consideration is not a taxable event. 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.The person gifting the vehicle must complete a sales tax exemption form (MVU-24). 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 an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. Can my family give me the money for a down payment on a home purchase in Massachusetts? To use gift funds, you must provide a gift letter proving the money is not a loan. A Monetary Gift Affidavit serves as proof that a cash gift was intended as a genuine gift and not as a trust or loan. A gift letter is proof to the lender that the funds were gifted to a homebuyer for their home purchase, and not a loan or borrowed money. The party giving the gift can make a significant and important gift with no money out of pocket.