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. MV-912: Vehicle Bill of Sale (PDF). English.Use this form to show proof of a vehicle ownership transfer through a private sale. Download. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. Get the buyer, seller, and witnesses to sign the bill. At the bottom of the form, leave spaces for the buyer's and seller's signatures. A Bill of Sale may be submitted for proof of purchase price. Sales tax will be collected if applicable. We have a database of mobile notaries that can respond on short notice.