From Calif DMV
https://www.dmv.ca.gov/portal/dmv/?1dmy&urile=wcm:path:/dmv_content_en/dmv/pubs/brochures/howto/htvr9
A Verification of Vehicle (REG 31) form (PDF) completed by an authorized DMV employee, law enforcement officer, or licensed vehicle verifier (no charge for vehicle verification at DMV offices).
ritrebor