The primary purpose of a bill of sale is to confirm the terms and provide evidence of the transaction between the seller and buyer. Learn about bills of sale in Massachusetts for cars, boats, firearms, and more.Learn about bill of sale laws and requirements for the state of Texas. Get templates for buying and selling high-value items like cars, boats, and firearms. A motor vehicle bill of sale is between a buyer and a seller of a car, truck, or motorcycle. It is signed as the last step in the sales process. Complete the Bill of Sale: Both parties must fill out a bill of sale, documenting the sale price, vehicle details, and signatures. I understand that I need to fill out the affidavit form MVU-29, but do I also need a bill of sale or letter of delivery from the dealership?
