FinCEN orders U.S. banks to block transfers involving MEXC Global and A7 network
FinCEN has ordered U.S. banks to block transfers involving MEXC Global and the Russia-linked A7 network, citing $16 billion and $17 billion in alleged illicit flows respectively. The rules give institutions 30 days to comply, but the A7 rule remains in proposal form while MEXC's cutoff ends…
U.S. cuts off MEXC and targets A7 network over illicit flows
The U.S. Treasury’s FinCEN has ordered banks to block transfers involving MEXC Global, citing at least $16 billion in alleged illicit flows. The same agency has been tracing the Russia‑linked A7 network for more than $17 billion in dollar‑denominated transfers over roughly 18 months. Both moves tighten how sanctioned actors can use crypto intermediaries and correspondent banks, but the mechanics of the two actions are distinct and the deadlines for compliance are tight.
How A7 routes money
FinCEN’s tracing shows over $17 billion moving through A7 sub‑agents from January 2025 to June 2026, according to Treasury documents. The network, designated a “significant transnational criminal organization” by OFAC on October 1, 2026, uses shell companies, falsified trade documents and controlled websites in jurisdictions such as Hong Kong, Indonesia, Kyrgyzstan and Seychelles. Its centerpiece is the ruble‑backed A7A5 token, which converts to Tether (USDT) and then to fiat, creating a crypto bridge for sanctioned entities. Sub‑agents process more than 2,000 transactions a day, roughly 13% of Russia’s 2025 foreign trade.
FinCEN proposed a rule that would block U.S. financial institutions from sending or receiving funds involving A7 sub‑agents. The proposal entered a 30‑day public comment period after the Federal Register publication. Until the rule is finalized, existing OFAC sanctions remain in force, requiring U.S. persons to freeze any property linked to the network and report it to the Office of Foreign Assets Control.
MEXC loses U.S. on‑ and off‑ramps
FinCEN ordered U.S. financial institutions to block all fund transfers involving MEXC Global on November 6, 2026. The order cites at least $16 billion in alleged illicit flows through MEXC, with links to Iran, North Korea and Russia. Once published in the Federal Register, the rule gives banks 30 days to comply, ending around December 7, 2026. The cutoff targets MEXC’s ability to settle fiat on‑ramps and off‑ramps via correspondent banks, not the crypto exchange itself.
MEXC’s Estonian entity, MEXC Estonia OÜ, and its Hong Kong parent, MX Global Ltd, are named in the action. The Treasury flagged severe AML control failures and ties to sanctions evasion and state‑sponsored cybercrime. Affected U.S. institutions face civil and criminal liability if they process transfers involving MEXC.
What comes next
The A7 rule still needs a final public comment period and OFAC enforcement actions, so its full scope is not yet locked in. For MEXC, the 30‑day cutoff means U.S. customers must find non‑U.S. on‑ and off‑ramps by mid‑December 2026. The Treasury has signaled further actions against the A7 network, but the impact on liquidity and settlement depends on how quickly foreign counterparties adopt the new screening rules. Until the rule settles, U.S. banks will be under pressure to balance compliance with maintaining access to crypto markets.
