California Code, Penal Code - PEN § 14164

(a) A financial institution, or any officer, employee, or agent thereof, that keeps and files a record in reliance on Section 14162, shall not be liable to its customer, to a state or local agency, or to any person for any loss or damage caused in whole or in part by the making, filing, or governmental use of the report, or any information contained therein.

(b) This title does not preclude a financial institution, in its discretion, from instituting contact with, and thereafter communicating with and disclosing customer financial records to, appropriate federal, state, or local law enforcement agencies when the financial institution has reason to suspect that the records or information demonstrate that the customer has violated any provision of this title or Section 186.10.