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. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer.This form is only available from authorized agents of PennDOT. A bill of sale is recommended if you're buying a motor vehicle, boat, or livestock. Use our downloadable RV bill of sale template to document the details of an RV sale and help transfer ownership. 1. Enter the Buyer and Seller's details. Motor Vehicle Bill of Sale Provides proof of purchase in the private sale of a vehicle. Download: PDF, Word (.