Many states in the US provide tax payers their own official form of the bill of sale obtainable from the DMV office. Citizens can also download the official form online from the DMV website. If the county r the state does not have their specifically-designed bill of sale form, there are generic versions online for the use of vehicle buyers and sellers.
The bills of sale for vehicles should contain all the necessary information like the model of the vehicle, the model year, the identification number and the sales price.