New Trailer and Off-Highway Vehicle (OHV) Report of Sale. California Bill of Sale Forms (3).A California bill of sale is an official document used to record the sale of personal property between a buyer and seller. The Trailer is to be sold free and clear of any liens, encumbrances, or mortgages. 1. Gather required information about the seller, buyer, and trailer. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. These documents include the vehicle's registration, proof of ownership, a valid insurance policy for your RV, proof of maintenance and general safety checks. You can also choose to fill out our online donation form. Residents may obtain a Temporary Overnight Recreational Vehicle Permit (TORVP) which will allow for overnight parking of RVs on the Resident's block. The California bill of sale form helps individuals document data on a transaction involving the sale, trade, or gift of personal property.