Make sure to review all documents before you sign. Vehicle Bill of Sale– This form will show proof of sale and purchase of a motor vehicle.The dealer is required to charge you 6 percent. A Michigan motor vehicle bill of sale is used to record the change of ownership when buying and selling a vehicle. Downloadable forms and instructions on how to create a bill of sale document for car, auto, truck, boat, firearm, horse, or other sales in the state of Michigan The Michigan DMV bill of sale form is useful for generating physical evidence containing transaction details specific to the sale of a motor vehicle.