OKX warns MEXC users of deposit freezes ahead of FinCEN cutoff

OKX urges users not to send funds directly from MEXC

OKX, a crypto exchange — a platform where users buy, sell and transfer digital assets — warned users on Nov. 7 not to transfer funds directly from MEXC to OKX. CEO Star Xu said the exchange had tightened its controls ahead of a U.S. financial cutoff against MEXC.

Xu said OKX treats FinCEN special measures with caution similar to sanctions. Under its controls, funds linked to affected platforms may be frozen and related accounts investigated.

He added that FinCEN gave a 30-day transition period, but OKX strengthened its controls already rather than waiting for the deadline.

Key points from the Nov. 7 warning

• OKX CEO Star Xu urged users on Nov. 7 to avoid direct transfers from MEXC to OKX.
• Xu said funds associated with affected platforms may be frozen and accounts investigated.
• Customers reported USDT deposits from MEXC held for review at OKX.
• Xu did not provide a timetable for releasing held funds or list documents needed to clear reviews.
• The FinCEN order takes effect 30 days after publication in the Federal Register, not on the announcement date.

Customers report USDT deposits under review

One customer, @HoppinsKarlz, said deposits of 848.8 USDT and 11.7 USDT from their own MEXC accounts were under risk review at OKX. USDT is a dollar-linked stablecoin, a type of token designed to track the U.S. dollar. The customer asked when legitimate customers would regain access and what documents were needed to verify the source of funds.

Another customer, @Mari78612, said a USDT transfer from MEXC was held at OKX. Earlier on Nov. 7, OKX's verified help desk told that user a withdrawal could not be processed because of a high-risk address warning. The reply described a withdrawal warning and did not explain the reported deposit hold.

What the FinCEN order does and does not do

FinCEN's Nov. 6 order prohibits covered U.S. financial institutions from sending funds to or receiving funds from MEXC Global, including cryptocurrency transfers. The order takes effect 30 days after publication in the Federal Register.

The order does not itself require immediate, worldwide freezes of customer assets at foreign exchanges. OKX's existing compliance policy already provides for risk-based checks, screening and ongoing monitoring for suspicious activity, and Xu said the exchange strengthened its own controls.

FinCEN alleges that MEXC facilitated the movement of $16.7 billion connected to Russian illicit finance and other illicit activities between May 2021 and May 2026. That amount is an allegation in the order, not a confirmed finding in the supplied material. MEXC previously said it had begun an independent review of its anti-money laundering and sanctions controls.

What MEXC said about its own operations

MEXC said it was operating normally and user assets remained secure. In a Nov. 7 reply to the OKX complainant, its Oceania account said withdrawals and trading continued as usual and directed the customer to OKX support about holds at the receiving exchange.

What is confirmed and what remains unclear

Confirmed from the supplied material: OKX strengthened controls before the FinCEN deadline, Xu warned against direct MEXC-to-OKX transfers, and FinCEN's cutoff for covered U.S. institutions has a 30-day delayed start. Reported but not independently confirmed in the material: the specific customer deposit holds and their amounts, based on customer posts. Unclear: when held funds will be released and what documents OKX requires, as Xu did not give a timetable or document list.

Sources

• The Defiant

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