FinCEN Cuts MEXC Off U.S. Finance Over $16B Illicit Claim

FinCEN on Friday ordered U.S. financial institutions to stop processing funds transfers to or from MEXC Global, saying the offshore crypto exchange facilitated at least $16 billion in illicit transactions from May 2021 through May 2026.

The Treasury press release frames the cut-off as part of Operation Economic Outcast. The order rests on section 9714(a) of the Combating Russian Money Laundering Act. It takes effect 30 days after publication in the Federal Register. It is a funds-transmittal ban under FinCEN rules. It is separate from an OFAC sanctions listing and does not rewrite Bank Secrecy Act or OFAC duties.

How a 9714 cut-off works

Section 9714 lets FinCEN bar covered U.S. banks and money transmitters from moving dollars or convertible virtual currency to or from a named foreign exchanger found to be of primary money laundering concern tied to Russian illicit finance. Once the clock starts, those firms face civil or criminal penalties for willful violations. MEXC already lists the United States as a prohibited jurisdiction in its terms, so the practical hit is remaining dollar rails, banking partners and counterparties that still clear through U.S. institutions.

Treasury says MEXC processed more than $1 billion a day and held about $5 billion in reserves as of September 2026, ranking among the world's 20 largest crypto exchangers. The release alleges nearly $1.5 billion in flows linked to Russian sanctions evasion, including $232 million in direct trades with U.S.-, EU- and UK-sanctioned entities, and continued activity with OFAC-designated Garantex and successor Grinex as recently as June 2026. It also cites about $1 billion in direct traffic with more than 40 Iranian crypto exchangers and roughly $22 million tied to Iran's Central Bank and the Islamic Revolutionary Guard Corps' Qods Force.

MEXC had not issued a public response to the Friday order by late afternoon ET, Bitcoin Magazine reported, noting the exchange's main X account kept posting marketing content through the afternoon. The Federal Register index had not yet posted the notice as of Friday evening, so the 30-day fuse had not started.

In our opinion: the Register clock is the number that starts the ban. Until that notice posts, covered banks still have a countdown ahead. Watch whether MEXC contests the finding, seeks an exemption, or reroutes liquidity away from U.S. rails once the order bites.