The Consumer Financial Protection Bureau is an independent federal agency that holds primary responsibility for regulating consumer protection with regard to financial products and services in the United States. The CFPB was created in 2011 following the passage of the Dodd–Frank Wall Street Reform and Consumer Protection Act, which was a response to the financial crisis of 2007–08. In the Dodd-Frank Act, Congress gave the CFPB the responsibility to adopt specific mortgage rules. More can be found at their website: http://www.consumerfinance.gov/mortgage-rules-at-a-glance/
The Financial Crimes Enforcement Network (FinCEN) is a bureau of the United States Department of the Treasury that collects and analyzes information about financial transactions in order to combat money laundering, terrorist financiers, and other financial crimes. (source: Wikipedia - http://en.wikipedia.org/wiki/Financial_Crimes_Enforcement_Network)
The Office of Foreign Assets Control (OFAC) of the U.S. Department of the Treasury administers and enforces economic and trade sanctions based on U.S. foreign policy and national security goals. It enforces those sanctions against targeted foreign countries and regimes, terrorists, international narcotics traffickers, those engaged in activities related to the proliferation of weapons of mass destruction, and other threats to the national security, foreign policy or economy of the United States. OFAC acts under Presidential national emergency powers, as well as authority granted by specific legislation, to impose controls on transactions and freeze assets under US jurisdiction. Many of the sanctions are based on United Nations and other international mandates, are multilateral in scope, and involve close cooperation with allied governments. (Source: http://www.treasury.gov/about/organizational-structure/offices/Pages/Office-of-Foreign-Assets-Control.aspx)
A suspicious activity report (or SAR) is a report made by a financial institution and sent to the Financial Crimes Enforcement Network (FinCEN), an agency of the United States Department of the Treasury, regarding suspicious or potentially suspicious activity. Outside of the United States, SARs are known as STR (Suspicious Transaction Report).
The Bank Secrecy Act of 1970 (or BSA, or otherwise known as the Currency and Foreign Transactions Reporting Act) requires financial institutions in the United States to assist U.S. government agencies to detect and prevent money laundering. Specifically, the act requires financial institutions to keep records of cash purchases of negotiable instruments, and file reports of cash purchases of these negotiable instruments of more than $10,000 (daily aggregate amount), and to report suspicious activity that might signify money laundering, tax evasion, or other criminal activities. (source: Wikipedia - http://en.wikipedia.org/wiki/Bank_Secrecy_Act)