Treasury cuts MEXC off from U.S. banks over $16B in illicit flow

FinCEN issued an order on November 6, 2026 naming the offshore crypto exchange MEXC Global a primary money laundering concern and barring U.S. financial institutions from processing funds transfers to or from it. Treasury links the designation to about $16 billion of transactions MEXC allegedly cleared for illicit actors between May 2021 and May 2026. The reporting is in The Block and Decrypt, both citing Treasury's own release; the underlying FinCEN document is the MEXC order under Section 9714, Treasury's new counter-Russia money-laundering authority.

What happened

• The order is issued under a Section 9714 provision of the Combating Russian Money Laundering Act of 2023, not the older FinCEN Section 311 authority used against Iran-linked Nobitex in June and BitBank in September.
• It takes effect 30 days after publication in the Federal Register.
• The action sits within a broader Treasury program Treasury calls Operation Economic Outcast.
• FinCEN cites "severe deficiencies" in MEXC's AML controls; MEXC says it maintains AML programs and will block users in Iran and North Korea.

The $16 billion, broken down

Treasury's figure covers transactions from May 2021 through May 2026. Per Decrypt's reading of the order:

• Russia — ~$1.5B linked to sanctions evasion, including flows through the sanctioned exchanges Garantex and its successor Grinex as recently as June 2026, and about $200M tied to the Kremlin-linked A7A5 ruble-pegged stablecoin.
• Iran — ~$22M benefitting Iran's central bank and the Islamic Revolutionary Guard Corps.
• North Korea — cited as a source of illicit finance, no specific sub-total disclosed.
• Approximately $232M of the total is attributed to direct transactions with already-sanctioned entities.

The practical effect

Under Section 9714, once the order is published, every U.S. bank and money-service business is prohibited from executing transmittals of funds that start or end with MEXC. The order does not freeze user assets held at MEXC directly — it severs the on-ramp and off-ramp to the dollar system.

Treasury Secretary Scott Bessent, in the department's statement, said: "Treasury will continue to sever the Iranian regime's economic lifelines." FinCEN separately said the action "will protect the U.S. financial system."

What to watch

1. The Federal Register publication date. That starts the 30-day clock and triggers the formal severance.
2. Whether OFAC follows with an SDN-style designation against MEXC entities or executives. Section 9714 is a transmittal ban; it does not block property, which a sanctions listing would.
3. Which stablecoin issuers respond. A7A5's $200M exposure is the most actionable number in the order; Tether and Circle have been the swing freezers on prior OFAC actions.
4. Enforcement against affiliates and successors. Garantex's reappearance as Grinex is the explicit model Treasury is trying to prevent.
5. Reaction from exchanges with historical MEXC deposit/withdrawal rails, which now have 30 days to document a wind-down.

Context

This is the fourth major Treasury action against a crypto exchange in 2026, after South Korea's FIU blocked 27 overseas venues (including MEXC and KuCoin) from local access in March, Nobitex's June Section 311 designation, and BitBank in September. Section 9714 — a 2023 Russia-focused tool — is here being applied for the first time to a crypto exchange with a China nexus, a pattern that fits Treasury's wider pivot from Iran- and DPRK-focused designations toward a Russia-first framing. Our prior coverage: South Korea FIU blocks 27 exchanges.