Cal. Veh. Code § 4022

A vehicle repossessed pursuant to the terms of a security agreement is exempt from registration solely for the purpose of transporting the vehicle from the point of repossession to the storage facilities of the repossessor, and from the storage facilities to the legal owner or a licensed motor vehicle auction, provided that the repossessor transports with the vehicle the appropriate documents authorizing the repossession and makes them available to a law enforcement officer on request.