An RV Bill of Sale is a legal document that serves as proof of the sale and transfer of ownership of a recreational vehicle (RV) from a seller to a buyer. Apply. Bill of Sale.Library File Link. 48-2004. Purpose. Seller Name (first, middle, last, suffix). A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. Learn more about a trailer bill of sale in Arizona and why you may need it when registering your trailer. Download in PDF or Word here. An Arizona Bill of Sale for RV Trailer is a formal document used to record the sale or transfer of RV trailers between a seller and a buyer in Arizona.