Make sure to review all documents before you sign. Michigan bills of sale are forms used to document the sale of vehicles, boats, firearms, or other personal items in Michigan.I. sold the following (check one): Printed Name. Vehicle Bill of Sale– This form will show proof of sale and purchase of a motor vehicle. The Michigan DMV bill of sale form is useful for generating physical evidence containing transaction details specific to the sale of a motor vehicle. It includes the price paid, the transaction date, and the signatures of the previous and new owner.