Vehicle Code § 4305
ARTICLE 3. Registration of Foreign Vehicles
In the absence of knowledge by the department that any certificate of title issued by another state is forged, fraudulent, or void, the acceptance thereof by the department shall be a sufficient determination of the genuineness and regularity of the certificate and of the truth of the recitals therein, and no liability shall be incurred by any officer or employee of the department by reason of so accepting a certificate of title.