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. The motor vehicle seller must insert the sales price, nonresident state and Arizona county tax rates and complete all mathematical calculations. Whether you buy a used car from a dealer, a co-worker, or a neighbor, follow these tips to learn as much as you can about the car. Bring the completed bill of sale, signed title, odometer disclosure statement, and any other required documents specific to your state. The document contains information about the buyer and seller, details about the vehicle, the date of the sale, and the price.