Planning to sell your trailer? Download one of our trailer bill of sale forms and get the job done ✔️ 38 templates available.The Trailer is to be sold free and clear of any liens, encumbrances, or mortgages. 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. How do I fill this out? Use this free form for private transactions. It comes in a printable PDF format, and you can quickly fill it out using your completer. This Bill of Sale is made between. Errors or alterations on the title or other documents presented for title transfer may require this form to be notarized.