I certify that I, or the firm, company, or corporation I am authorized to represent, am the legal owner within the meaning of California Vehicle Code. The PCOR is near the bottom of the page under "Change in Ownership Forms".1. Enter the lienholder's name and address. Need to file a mechanics lien in Contra Costa County? Here's what you need to know to record your lien with the Contra Costa County Recorder. Official Forms for Viewing and Downloading. Prepare your documents: Complete "Plaintiff's Claim and ORDER to Go to Small Claims Court. The Clerk-Recorder's Office does not offer blank forms of documents for recording. Clerk-Recorder Staff is prohibited from giving legal advice. Complete this form and bring it with the license plates, if any, to any Motor Vehicles office.