FinCEN orders U.S. institutions to block MEXC transfers

The U.S. Financial Crimes Enforcement Network issued an order on November 6 prohibiting covered American financial institutions from sending or receiving funds, including cryptocurrency, to or from MEXC Global. The measure targets the exchange’s operations outside the United States and has no scheduled end date.

The prohibition is not yet effective. FinCEN submitted the order for Federal Register publication, and its terms begin 30 days after that publication. Because the official document had not supplied the publication date when the action was announced, no calendar compliance date can yet be established.

A transfer ban, not an immediate global shutdown

FinCEN acted under Section 9714 of the Combating Russian Money Laundering Act after finding MEXC to be a foreign financial institution of primary money-laundering concern in connection with Russian illicit finance. The order reaches MEXC’s foreign branches, subsidiaries, offices and successor entities. It expressly excludes any branch, subsidiary or office located in the United States from its definition of MEXC Global.

Covered financial institutions will be barred from any transmittal of funds from or to the exchange. The order defines funds to include convertible virtual currency, making it broader than a restriction limited to conventional bank wires or dollar clearing. FinCEN may grant exemptions or impose conditions later.

The action does not shut MEXC worldwide, freeze every customer account or seize assets held by the exchange. Nor does it modify existing Bank Secrecy Act reporting duties or sanctions administered by the Treasury Department’s Office of Foreign Assets Control. Its immediate operational consequence is that regulated U.S. institutions must prepare to identify and block covered MEXC transfers once the order takes effect.

FinCEN acknowledged a practical limitation for cryptocurrency. A receiving institution may be unable to reject an incoming blockchain transfer before it arrives because it does not control the sending address or network. The agency therefore allows discretion in handling certain incoming cryptocurrency, including situations where assets passed through an unhosted wallet or cannot safely be returned to MEXC.

FinCEN attributes $16.7 billion to illicit activity

The agency said its analysis of public information, nonpublic information and blockchain data identified $16.7 billion moving through MEXC in connection with sanctions evasion, cybercrime and other suspected illicit activity from May 2021 through May 2026.

Within that five-year window, FinCEN attributed nearly $1.5 billion of direct and indirect exposure to Russian sanctions evasion, including $232 million in direct transactions with entities sanctioned by the United States, European Union or United Kingdom. The agency said MEXC continued transacting with the sanctioned Garantex exchange and its successor Grinex as recently as June 2026.

FinCEN also assessed that MEXC processed approximately $1.87 billion with exposure to Iran during the May 2021–May 2026 window. More than $1 billion allegedly consisted of direct transactions with over 40 identified Iranian cryptocurrency exchanges, while approximately $22 million was associated with Iran’s central bank and the Islamic Revolutionary Guard Corps or its Quds Force.

Those amounts are FinCEN’s analytical findings, not figures independently audited by Coinburn or adjudicated by a court. The order relies partly on nonpublic information, preventing outside reproduction of the agency’s complete methodology. FinCEN also acknowledged that some MEXC activity is legitimate but said it lacked full visibility into its extent.

What remains unresolved

MEXC had not published a response to the order in the materials located by Coinburn before this edition’s cutoff. The available record therefore does not establish whether the exchange disputes the transaction attribution, intends to submit information to FinCEN or plans operational changes before the prohibition begins.

The next verifiable milestones are Federal Register publication, the resulting effective date and any response from MEXC. Until then, the precise conclusion is that FinCEN has ordered a prospective U.S. transfer prohibition based on its own findings—not that the restriction is already active or that every allegation has been judicially proven.