Library File Link. 48-2004. Purpose. An Arizona motor vehicle bill of sale is part of the vehicle registration process.You can use our free template to create your document. An Arizona motor vehicle bill of sale (ADOT Form 48-2004) is a legal document that transfers ownership of a motor vehicle from a seller to the buyer. Use the tips and resources below to help protect yourself and prepare for your next automobile purchase. Click on the topic to learn more. To draft a bill of sale for a car in Arizona, you should first enter the details about the seller and buyer, including their full names and mailing addresses. The motor vehicle seller must insert the sales price, nonresident state and Arizona county tax rates and complete all mathematical calculations. If you have a written contract, the seller must live up to the promises stated in the contract. I bought a car in Phoenix, Arizona yesterday, August 5, 2010.