There could be a number of reasons why you would need a VIN verification, here are some situations where you would need to obtain one:
Vehicle purchased out state to be registered in California
Any person/s who purchase a vehicle from outside of California (non resident) and want to register a vehicle in CA need a vehicle VIN verification to receive a CA title.
Odometer discrepancies
Vehicles that have odometer errors or are in need of explanation of the validity of an odometer reading by the Department of Motor Vehicles is subject to a VIN verification.
Salvage/revived junk vehicles
In addition to needing a brake and lamp inspection, all salvage and revived junk vehicles are required to have a VIN verification to be registered in CA.
*These types of vehicles must be referred to the DMV or CHP for inspection
