The U.S. Treasury’s Financial Crimes Enforcement Network (FinCEN) issued an order on Friday that bars U.S. financial institutions from processing any transfers to or from MEXC Global, a cryptocurrency exchange that ranks among the world’s top‑20 by volume. The action, part of the Treasury’s Operation Economic Outcast, accuses MEXC of facilitating at least $16 billion in illicit transactions tied to sanctions evasion and cybercrime involving Russia, Iran and North Korea, according to the agency’s filing.

Alleged Sanctions‑Evasion Activity

FinCEN’s order states that between May 2021 and May 2026 MEXC moved roughly $16 billion connected to prohibited activity, including nearly $1.5 billion linked to Russian sanctions evasion and $232 million in direct transactions with sanctioned Russian exchanges Garantex and its successor Grinex. The agency also cited about $200 million tied to the A7A5 stablecoin—a ruble‑backed token used by Russia’s A7 Network—and roughly $22 million that benefited Iran’s central bank and the Islamic Revolutionary Guard Corps.

Compliance Deficiencies Highlighted

Despite publicly claiming robust anti‑money‑laundering (AML) controls and banning users from Iran and North Korea, FinCEN said MEXC’s compliance program suffered “severe deficiencies.” The exchange continued to transact with the sanctioned Russian platforms well after Garantex’s designation, and it processed sizable volumes for entities the Treasury has recently blacklisted, such as Iran’s Nobitex exchange.

Regulatory Impact and Timeline

The order invokes the Combating Russian Money Laundering Act, a tool the Treasury has increasingly used to cut off crypto infrastructure that bypasses the traditional correspondent banking system. The prohibition becomes effective 30 days after its publication in the Federal Register, giving U.S. banks and payment providers until early January 2027 to halt all fund transfers involving MEXC. Treasury Secretary Scott Bessent emphasized that U.S. financial institutions must choose between supporting sanctioned regimes and maintaining access to the U.S. financial system.

What to Watch Next

Analysts will monitor whether MEXC seeks to restructure its AML framework to regain access to U.S. banks, and how other exchanges respond to the Treasury’s expanding crackdown. Further sanctions designations against related entities in Russia’s A7 network or Iran’s crypto sector could broaden the scope of the order. Finally, the market’s reaction to the removal of a high‑volume exchange from the U.S. financial ecosystem may influence liquidity flows across other platforms.