OKX founder Star Xu issued a warning on X on November 7, 2026, advising users to avoid direct transfers from MEXC to OKX. The advisory came after the U.S. Treasury's Financial Crimes Enforcement Network (FinCEN) introduced special measures targeting MEXC, and as OKX began applying additional risk checks to funds originating from the platform. Some OKX users have reported that their USDT deposits were flagged and frozen.

Enhanced Controls on MEXC-Linked Funds

According to a report by Cryptobriefing, OKX has implemented stricter screening measures for funds associated with MEXC. The controls have been described as comparable to the procedures exchanges may apply when handling transactions connected to financial sanctions.

The move followed FinCEN's announcement of a 30-day transition period for its measures against MEXC. Such transition periods are intended to allow platforms and users time to adjust before measures are fully applied. Rather than waiting for that period to conclude, OKX appears to have introduced its additional controls immediately.

Xu's warning specifically concerns direct transfers from MEXC to OKX. His advisory did not identify particular trading volumes, tokens, or trading pairs as the focus of the restrictions.

Frozen USDT Deposits Reported Across Tron and Ethereum

Reports from OKX users indicate that USDT deposits transferred directly from MEXC have been flagged and frozen. The stablecoin, issued by Tether, circulates across multiple blockchains, and the complaints involve both TRC20 and ERC20 versions. TRC20 USDT operates on the Tron blockchain, while ERC20 USDT runs on the Ethereum network.

The reported deposit issues appear to stem from compliance screening of wallet addresses rather than from problems limited to a single network. Concerns have centered on addresses classified by OKX's systems as high risk. The reports emerged on November 7 and 8, 2026, alongside coverage of Xu's public advisory.

What the Warning Means for Exchange Users

Users planning to move assets from MEXC to OKX face the possibility that incoming deposits could be flagged for additional review. Xu's recommendation is to avoid the direct transfer route temporarily. Notably, the advisory came from the founder of the destination exchange itself, aligning with OKX's own decision to tighten controls on MEXC-linked funds.

Customers whose USDT deposits have already been frozen may need to follow OKX's compliance review procedures. The available information does not specify how long individual reviews may take or when the enhanced controls could be relaxed.

The situation highlights how regulatory action involving one cryptocurrency exchange can affect transactions handled by another platform. As exchanges respond to compliance requirements, restrictions on funds originating from particular services may influence how users move assets between platforms.

Two developments remain relevant: whether OKX adjusts its screening measures after FinCEN's 30-day transition period ends, and whether other exchanges introduce similar restrictions on deposits linked to MEXC.

Source: Cryptobriefing. Originally published by Hokanews; reporting by Ethan Collins.