The Office of the Comptroller (OCC) is an independent bureau of the U.S. Department of the Treasury. It charters, regulates and supervises all national banks and federal savings associations, as well as federal branches and agencies of foreign banks. The OCC ensures that national banks and federal savings associations: provide fair access to financial services, treat customers fairly and comply with applicable laws and regulations. The OCC enforces the bank secrecy act (BSA) by mandating requirements that protect national security, fight money laundering and deter criminal activity within the banking system.