Treasury Cuts Crypto Exchange MEXC Off From US Financial System Over $16B in Flagged Transactions
The U.S. Treasury's FinCEN issued an order barring American financial institutions from processing funds transfers to or from MEXC Global, citing at least $16 billion in transactions it links to illicit activity. The order takes effect 30 days after publication in the Federal Register.
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The Order and Its Scope
The U.S. Treasury Department's Financial Crimes Enforcement Network (FinCEN) issued an order on Friday that bars U.S. financial institutions from processing any funds transfers to or from MEXC Global, the crypto exchange Treasury said was a major conduit for sanctions evasion and cybercrime. The order takes effect 30 days after publication in the Federal Register. Financial institutions that violate it could face civil or criminal penalties.
The order was issued under Section 9714(a) of the Combating Russian Money Laundering Act rather than a standard sanctions designation, a tool FinCEN has increasingly used against crypto infrastructure that operates outside the correspondent banking system. Treasury Secretary Scott Bessent framed the action as part of Operation Economic Outcast, a campaign launched in August to cut off financial networks supporting Iran.
Volume Figures Across the Two Accounts
Both sources cite the same headline figure: MEXC processed at least $16 billion in transactions connected to illicit activity between May 2021 and May 2026, according to FinCEN. The sources diverge on how that total breaks down. One account attributes nearly $1.5 billion of it to Russian sanctions evasion and $232 million to direct transactions with sanctioned entities. The other reports the $232 million as involving entities sanctioned by the U.S., European Union and United Kingdom, and gives a separate figure of roughly $1 billion tied to direct transfers with more than 40 Iranian crypto exchanges. The reports also differ on the Russia-linked A7 network exposure, with one citing about $200 million tied to the A7A5 stablecoin and the other citing at least $26 million benefiting the A7 network itself alongside nearly $200 million connected to A7A5.
The sources agree that MEXC's reported scale is large. As of September, the exchange processed more than $1 billion in daily trading volume, held roughly $5 billion in reserves and offered more than 3,000 tokens, figures Treasury attributes to FinCEN.
Iran, Russia and Compliance Gaps
Treasury's findings tie MEXC to several sanctioned groups. The exchange processed about $22 million benefiting Iran's central bank and the Islamic Revolutionary Guard Corps, including its Qods Force. Treasury also said MEXC continued transacting with the sanctioned Russian exchange Garantex and its successor Grinex as recently as June 2026, more than four years after Garantex was first sanctioned in April 2022.
Despite public statements that it bars users in sanctioned jurisdictions such as Iran and North Korea, FinCEN said MEXC's anti-money-laundering controls had "severe deficiencies" that allowed prohibited transactions to continue. The agency named MEXC a "primary money laundering concern" in connection with Russian illicit finance.
Broader Sanctions Campaign
The MEXC action sits alongside other steps in the same effort. Treasury recently designated Russia's A7 Network a transnational criminal organization and proposed cutting its front companies off from U.S. finance, flagging more than $179 billion in transactions through the ruble-backed A7A5 token. Separately, Treasury gained broad authority to sanction anyone operating in Iran's crypto sector and blacklisted the Iranian exchange Nobitex over its role in funneling crypto to the IRGC.
Why It Matters
For Traders
Access to MEXC for U.S.-linked transfers is set to end 30 days after Federal Register publication, so traders relying on U.S. banking rails to fund or withdraw from the platform should plan for that timeline.
For Investors
The order signals that U.S. regulators are willing to use anti-money-laundering authorities to cut large offshore exchanges off from the dollar system, a precedent that could extend to other platforms.
For Builders
Teams building on-ramps or payment flows should audit whether any counterparty touches MEXC or sanctioned entities, since U.S. institutions will be prohibited from processing those transfers.
This article is for information only and is not financial advice. Read the full disclaimer.
