What documents do I need for vehicle registration in California?
Ava's answer: For vehicle registration in California, California Department of Motor Vehicles lists 2 items: Seller-signed title; Other documents when applicable. Confirm with the agency before you go.
- Seller-signed title — The seller’s signature is required on the title. For a missing title, follow the DMV REG 227 instructions.
- Other documents when applicable — The DMV lists a bill of sale in some cases, odometer disclosure for covered vehicles and a smog certification; check the official page for the rules and exceptions.
Source: Registration for a Vehicle Purchased from a Private Party — California Department of Motor Vehicles, reviewed 2026-09-29
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DMV.ai is independent and not a government agency. It does not file applications or collect government fees. Confirm current requirements with the official agency.