Quick facts

What it is

The Financial Crimes Enforcement Network is a bureau of the U.S. Treasury Department. It administers the Bank Secrecy Act, the framework that requires financial institutions to keep records and report suspicious activity, and it collects and analyzes those reports to support law enforcement.

Why it matters in crypto

FinCEN has long treated businesses that exchange or transmit virtual currency as money services businesses, which means they must register, maintain anti-money-laundering programs, and file suspicious activity reports. Because crypto moves across borders quickly, FinCEN's rules shape how exchanges verify customers, screen transactions, and share information with banks and investigators.

Who runs it

As of this page's last review, we cite FinCEN's leadership only where a document names it. The notice withdrawing the mixing proposal was signed by FinCEN Deputy Director Jimmy L. Kirby, according to The Block.

Recent moves

On September 3, 2026, FinCEN published an analysis finding nearly $13 billion in activity tied to suspected digital-asset investment scams across 33,904 Bank Secrecy Act reports, covered in our FinCEN scam analysis.

On October 5, 2026, FinCEN withdrew two long-pending proposals. One was its October 2023 finding that international crypto mixing is a class of transactions of primary money laundering concern, along with the proposed rule attached to it. The other was a December 2020 proposal on self-hosted wallets that would have required verification and recordkeeping above $3,000 and reporting above $10,000. FinCEN cited concerns that the mixing definition could chill legitimate activity, and the July 2025 report of the President's Working Group on Digital Asset Markets, which said lawful users may use mixers for privacy. Neither proposal was ever finalized, so existing obligations are unchanged. FinCEN said it will keep monitoring mixer activity.

Timeline

How it fits with the other agencies

FinCEN and OFAC are both Treasury components, but they do different work. FinCEN focuses on detecting and preventing money laundering through reporting and recordkeeping rules, while OFAC enforces sanctions. A crypto exchange typically has to satisfy both: screen customers against sanctions lists and file suspicious-activity reports. Banking regulators like the OCC examine whether regulated institutions follow FinCEN's rules.

The October 2026 withdrawals reflect a broader reorientation in how the administration is approaching digital-asset rules, which FinCEN described as making them 'fit-for-purpose.' Whether that leads to narrower, more targeted rules, or to gaps that illicit actors exploit, is the central debate among compliance specialists and privacy advocates alike.

What to watch

Watch for how FinCEN balances illicit-finance enforcement against privacy and compliance burden, and for its role in implementing anti-money-laundering provisions tied to stablecoin rules. Related terms: mixer, self-hosted wallet, and pig butchering.

Frequently asked

Does withdrawing the mixer rule make mixers legal?

The withdrawn proposal was never finalized, so it did not change existing obligations. Withdrawing it means a proposed new reporting regime will not happen, but other laws and enforcement tools still apply, and FinCEN said it will continue to monitor mixer activity.

What is the Bank Secrecy Act?

It is the main U.S. anti-money-laundering law. It requires financial institutions, including many crypto businesses, to keep records and report suspicious or large transactions, and FinCEN administers it.

Is FinCEN the same as OFAC?

No. Both sit in the Treasury Department, but FinCEN writes anti-money-laundering rules and collects reports, while OFAC administers and enforces economic sanctions.

Further reading

More profiles: SEC · CFTC · OCC · Fed · OFAC · All of Who's Who · Glossary