The Treasury Department's financial crimes unit ordered U.S. financial institutions on Nov. 10 to stop processing fund transfers involving MEXC Global, a Seychelles-based cryptocurrency exchange that FinCEN says moved billions of dollars connected to Russian sanctions evasion, Iran, North Korea, and cybercrime. The order, published in the Federal Register, takes effect Dec. 10 and has no end date. It follows a Treasury announcement on Nov. 6 that described the action as part of Operation Economic Outcast.

The order is a special measure under the Combating Russian Money Laundering Act, not an OFAC sanctions designation. That distinction matters. MEXC is not being added to the list of blocked persons, and the order does not freeze its assets. What it does is cut the exchange off from the U.S. financial institutions that move dollars, including banks, money transmitters, and U.S.-regulated crypto exchanges. For a platform that handles more than $1 billion in daily transactions, that is the more consequential penalty.

What FinCEN says MEXC did

FinCEN calls MEXC a financial institution of primary money laundering concern in connection with Russian illicit finance. The order covers MEXC Global Ltd and MX Global Ltd in the Seychelles, MEXC Estonia, GIDA Technology in Switzerland, MXC Global in the United Kingdom, and successor entities. MEXC was founded in 2018 and has grown into one of the 20 largest convertible virtual currency exchangers by trading volume. As of December 2025, it held about 9% of the global market share among centralized exchanges, according to the order. The platform offers trading in more than 50 fiat currencies, including dollars and rubles, and access to more than 3,000 tokens and tokenized assets.

The findings are specific. FinCEN says that between May 2021 and May 2026, MEXC facilitated the movement of $16.7 billion in funds connected to Russian illicit finance and other illicit activity, including sanctions evasion and cybercrime. Treasury's announcement rounded the figure to at least $16 billion. The order cites nearly $1.5 billion in exposure to Russian sanctions evasion, including $232 million in direct transactions with entities sanctioned by the United States, the European Union, or the United Kingdom.

The most striking example involves Garantex, a Russia-backed exchange that OFAC sanctioned in April 2022, and Grinex, which FinCEN describes as a successor set up by Garantex employees to keep moving funds. The order says MEXC facilitated about $129 million in activity with Garantex and $4.1 million with Grinex after the designations, and continued to transact with both as recently as June 2026. It also cites about $26 million in transactions involving the A7 Network, a sanctions-evasion operation tied to Ilan Shor and Promsvyazbank, and nearly $200 million connected to the A7A5 stablecoin.

The order goes beyond Russia. FinCEN says MEXC sent or received about $1 billion in direct transactions with more than 40 Iranian crypto exchanges, some of them sanctioned, and processed about $22 million for the Central Bank of Iran and the Islamic Revolutionary Guard Corps and its Qods Force. It also cites financial facilitators for North Korea, ransomware payments, scam proceeds, and Russian darknet market activity.

What the order does, and does not do

The operative sentence is broad. The order prohibits any covered financial institution from engaging in any transmittal of funds from or to MEXC Global. Covered financial institutions are defined by reference to the Bank Secrecy Act's definition of financial institution, which reaches banks, brokers, money transmitters, and crypto exchanges. Transmittals of funds are defined to include the sending and receiving of funds, including convertible virtual currency.

The order binds U.S. institutions, not MEXC itself. MEXC can keep operating offshore, and its users can keep trading crypto for crypto on the platform. But the exchange loses the U.S. banking and payments relationships that let dollars enter and leave the platform directly. Treasury says U.S. institutions that willfully violate the order can face civil or criminal penalties. The order does not modify existing Bank Secrecy Act obligations, including suspicious activity reporting, or OFAC sanctions.

There is also a question of reach. FinCEN wrote in the order that it was not imposing the special measures available under section 311 of the USA PATRIOT Act because recordkeeping and reporting requirements would not be enough. It chose the stronger transmittal prohibition instead. The order leaves FinCEN room to impose conditions on specific transfers or grant exemptions. MEXC has said it is seeking a constructive dialogue with FinCEN.

Treasury Secretary Scott Bessent framed the action as a binary choice, saying financial institutions cannot "have it both ways" on Iran. The action is part of Operation Economic Outcast, a Treasury campaign aimed at Iranian sanctions evasion. That framing explains why the order reaches beyond Russia even though the legal finding is rooted in Russian illicit finance.

An OFAC designation would have barred U.S. persons from dealing with MEXC and could have exposed foreign banks to secondary sanctions. This order is narrower in legal form but wider in operational effect for the exchange's dollar access. It tells every U.S. bank and payment processor that a transfer involving MEXC is now off limits, and it puts the compliance burden on them. Banks now have to screen for MEXC across customer transactions, correspondent accounts, and crypto flows. That kind of screening is imperfect, and institutions often respond by refusing any exposure rather than pricing the risk.

For an individual in the United States, the order does not make it illegal to hold crypto on MEXC. It binds financial institutions, not users. But it removes the regulated channels that let dollars move to and from the platform, and it gives banks and payment processors a reason to treat any MEXC-linked transfer as a red flag.

MEXC's response

MEXC said its services, deposits, withdrawals, and trading were operating normally. Chief executive Vugar Usi said on Nov. 10 that the exchange had established an official communication channel with FinCEN with help from major U.S. law firms, and that FinCEN had confirmed receipt of a written request submitted on Monday morning. Usi said the company is "fully prepared to cooperate" with any requirements that arise, according to TradingView's report. The exchange said it would share its response plans once they are final.

The exchange's public position is that the order restricts some transfers between MEXC and U.S. financial institutions, not all of its business. That is accurate as far as the text goes. The order does not prohibit MEXC from serving non-U.S. customers or from transacting in crypto with non-U.S. counterparties. But the practical effect depends on how broadly banks and exchanges read their obligations, and on whether foreign institutions that touch the U.S. dollar system decide that MEXC is not worth the risk.

The ripple effects

Binance did not wait for the effective date. On Nov. 10 it said it would reject transfers to and from MEXC and review accounts with linked activity, according to BeInCrypto's report. Binance is not a U.S.-regulated exchange, and the order does not directly bind it, but it pleaded guilty to U.S. charges in 2023 and paid about $4.3 billion. Its compliance department has reasons to move early.

The enforcement also drew a challenge to the numbers. ZachXBT, an investigator who traces crypto flows, agreed that MEXC's customer checks have been loose but disputed the $16 billion figure, saying it seemed overstated and asking Treasury to release its data and comparisons. He named KuCoin, which settled U.S. charges in 2025, as a worse offender that has not been hit with the same measure. Treasury has not said whether it will release the underlying analysis.

That dispute matters because the order's findings rest partly on non-public information. FinCEN says it used blockchain analysis and other data. The public portion of the order gives totals and examples but not a full transaction-level breakdown. MEXC's cooperation, if it produces one, could test the government's figures. So could a court challenge, though none has been filed.

The precedent is not new. FinCEN used the same authority against Bitzlato, a smaller Russia-linked exchange, in 2023. What is new is the size of the target. MEXC is a top-20 exchange with a global user base and thousands of listed tokens. Cutting it off from U.S. banks is a test of whether dollar access is the enforcement lever that changes behavior in offshore crypto markets.

What to watch

The first date is Dec. 10, when the prohibition takes effect. Before then, watch whether FinCEN grants MEXC an exemption or agrees to conditions on specific transfers, and whether the exchange files a legal challenge. Watch the U.S. banks and payment processors that handle crypto flows: their public policies will determine how much of MEXC's business stops. Watch Binance and other large exchanges to see whether they follow with their own restrictions.

The second question is the money. If MEXC's dollar rails close and users move assets to other venues, the exchange's reserves and market share will show it. Outflows can also become a self-reinforcing problem if customers rush for the exits. MEXC says withdrawals are normal. The next few weeks will show whether that holds.

The third is the evidentiary one. Treasury has tied a large number to a single exchange and placed the burden of compliance on U.S. institutions. If the underlying data becomes public and holds up, the action becomes a template for cutting off other offshore venues. If it does not, the debate will focus on whether the government used a number it cannot defend to achieve a policy end. Either way, the order has already changed the calculation for every exchange that touches the U.S. dollar system.

Primary sources

  1. The Federal Register order for the findings, definitions, prohibited transmittals, and Dec. 10 effective date.
  2. Treasury's Nov. 6 press release for the Operation Economic Outcast announcement, the $16 billion figure, and Secretary Bessent's statement.
  3. TradingView's Bloomingbit report for MEXC's response and Chief Executive Vugar Usi's comments.
  4. BeInCrypto via Mitrade for Binance's transfer block and ZachXBT's challenge to the figures.