Treasury Cuts Off MEXC Global Over $16 Billion in Illicit Flows

Sixteen billion dollars. That is how much illicit money the U.S. Treasury says flowed through MEXC Global between May 2021 and May 2026, and on Friday it moved to cut the exchange off from the American financial system entirely.

The Financial Crimes Enforcement Network (FinCEN) issued an order on November 6 that bars covered U.S. financial institutions from sending funds to or receiving funds from MEXC Global. The agency calls the exchange a foreign financial institution "of primary money laundering concern in connection with Russian illicit finance," and it folded the action into a Treasury campaign it calls Operation Economic Outcast. Treasury Secretary Scott Bessent put it bluntly in the announcement: "Financial institutions cannot have it both ways."

MEXC Global in figures

These numbers come from the FinCEN announcement and the order itself:

• $16 billion: illicit activity FinCEN says MEXC facilitated from May 2021 to May 2026.
• $1.5 billion: transactions FinCEN links to Russian sanctions evasion.
• $232 million: direct transactions with entities sanctioned by the U.S., the EU or the UK.
• About $1 billion: direct transactions with more than 40 Iranian crypto exchangers.
• About $22 million: activity tied to the Central Bank of Iran and the IRGC Qods Force.
• Nearly $200 million: activity tied to A7A5, a ruble backed stablecoin, plus about $26 million tied to the A7 network behind it.
• $37.9 million: suspected ransomware payments received between January 2022 and July 2024.
• 3,000+: crypto assets and tokenized products listed on the platform.
• Top 20: where FinCEN ranks MEXC among crypto exchangers, with more than $1 billion in daily volume and about $5 billion in reserves.

What the Russia and Iran totals point to

The largest single bucket is Russia. FinCEN ties nearly $1.5 billion of MEXC flows to sanctions evasion, and the order says transactions with Garantex and its successor Grinex continued as recently as June 2026. Garantex was a Moscow linked exchange that U.S. authorities had already targeted, so continued contact with it is a red flag regulators rarely ignore.

The A7 figures matter for the same reason. Treasury's sanctions office sanctioned the A7 network on October 1, 2026, and FinCEN describes A7A5 as part of the machinery Russia uses to move value across borders outside the regular banking system.

Iran is the second thread. Around $1 billion in direct business with more than 40 Iranian exchangers suggests something more than a few stray accounts slipping through. FinCEN says MEXC claims to block users from Iran and North Korea, but it concluded the exchange's customer checks have "severe deficiencies." North Korea appears too, though in a far smaller amount: about $350,000 sent to a sanctioned money launderer named in the order.

Why the law used here is unusual

FinCEN did not rely on its more familiar Patriot Act tool. It used section 9714 of the Combating Russian Money Laundering Act, as expanded by the 2022 defense authorization law, which lets Treasury target foreign institutions tied to Russian illicit finance. The prohibition covers MEXC Global and its non U.S. branches and subsidiaries. U.S. located affiliates are excluded.

The order takes effect 30 days after it appears in the Federal Register, and it has no end date. Banks still have to file suspicious activity reports and follow existing sanctions rules, and willful violations can bring civil or criminal penalties.

MEXC also has a regulatory history abroad. FinCEN points to warnings or actions over unlicensed activity from Japan's Financial Services Agency in 2023, Hong Kong's Securities and Futures Commission in 2024 and the Seychelles regulator in May 2026, according to the order and The Block.

What a 30 day clock means for U.S. users

Any American with money on MEXC Global should pay attention. Once the order is live, U.S. banks, payment firms and regulated crypto platforms cannot move money to or from the exchange. Anyone holding funds there has a narrow window, and withdrawing to a wallet you control is the safest move. Our guide on how crypto wallets work covers the options.

The action lands during a stretch when big exchanges are already under a microscope, from the Binance hack and its fallout to the DOJ review of Binance's 2023 settlement. It also follows Russia's own push to ban direct P2P crypto trades, which leaves sanctioned money looking for offshore exits like the ones FinCEN describes. More coverage is on our crypto page.

The open question is whether other large offshore exchanges with similar customer bases are next on Treasury's list.