FinCEN in the US

The Financial Crimes and Enforcement Network (or FinCEN) is part of the United States Department of the Treasury and analyzes financial transactions to prevent financial crimes such as money laundering or terrorism financing.

FinCEN also overviews virtual currencies. In 2013, FINCEN released a paper stating that virtual currency service providers are subject to the Bank Secrecy Act. They must thus register as a Money Service Business (MSB) with the organization.

FinCEN's website.https://www.fincen.gov