New Trailer and Off-Highway Vehicle (OHV) Report of Sale. 1. Gather required information about the seller, buyer, and trailer.The Trailer is to be sold free and clear of any liens, encumbrances, or mortgages. You need a California Trailer Bill of Sale form to register your trailer with the DMV after purchasing it from a private party. You can mail in the completed form to our office. The applications are computer-fillable PDF forms. Download the form, save it to your computer, complete it, sign it, and save the file for uploading. The applications are computer-fillable PDF forms. Download the form, save it to your computer, complete it, sign it, and save the file for uploading. First Citizens provides a full range of banking products and services to meet your individual or business financial needs.