A bill of sale is a legal document that outlines the purchase of property between a buyer and seller. It commonly includes both parties' information.Proof of ownership may be a bill of sale, conditional sales contract, out ofstate registration, etc. 4. Clearly print or type all information, except signatures. This North Carolina title transfer guide gives you everything you need to know to transfer a vehicle title in the Tarheel State. 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. First, choose the consumer complaint form that fits your problem.