South Korea’s Financial Intelligence Unit (FIU), operating under the Financial Services Commission, has confirmed enforcement action against crypto exchange Coinone, imposing a 5.2 billion won fine and a three-month partial business suspension. The sanctions follow an on-site inspection that found broad weaknesses in the exchange’s anti-money laundering and customer verification controls, reinforcing the country’s increasingly strict stance on compliance standards for virtual asset service providers.
Major Failures in Identity Verification
At the center of the case were serious shortcomings in Coinone’s know-your-customer procedures. Regulators said the exchange failed to properly verify customer identities in around 70,000 cases. Of these, about 40,000 involved ID documents that were incomplete or could not be properly verified, while another 30,000 cases involved customers who were allowed to trade before the verification process had been completed.
These findings are especially significant in South Korea, where real-name verification and strict account onboarding standards are a central part of the country’s crypto regulatory framework. The FIU has consistently framed these rules as essential to reducing illicit finance risks in the digital asset sector, particularly money laundering and cross-border evasion through offshore platforms.
Dealings With Unregistered Overseas Platforms
In addition to onboarding failures, the FIU found that Coinone processed roughly 10,113 transactions connected to 16 unregistered overseas virtual asset exchanges. Regulators said this activity violated the Act on Reporting and Using Specified Financial Transaction Information, often referred to as the Special Financial Information Act.
The case was not limited to one isolated compliance lapse. Authorities also cited inadequate transaction monitoring, failures to report certain dealings involving overseas exchanges, and a failure to halt restricted transactions even after regulators had requested action. Taken together, the violations suggested not just procedural errors, but wider shortcomings in Coinone’s internal compliance controls.
What the Suspension Means for Users
The FIU described the enforcement action as a partial suspension, not a full shutdown. The suspension runs from April 29, 2026, through July 28, 2026. During that period, new users will be unable to deposit, withdraw, or make external virtual asset transfers for the purpose of crypto trading. However, existing users will retain access to trading, deposits, withdrawals, and South Korean won transactions.
This distinction matters. Coinone’s platform will remain operational, and current customers will not see their normal account activity blocked. Still, restricting new-user services and external transfer activity is likely to affect user acquisition and create short-term pressure on business growth and revenue generation.
Executive Warning and Possible Legal Response
Coinone CEO Cha Myung-hoon also received an official warning as part of the enforcement package. The exchange has been given 10 days to submit additional opinions regarding the fine before it is finalized. Coinone said it is taking the matter seriously and is working to correct the compliance gaps identified by regulators.
The company also indicated that it will review whether to file an administrative lawsuit after discussions with its board. That leaves open the possibility that, like some of its domestic peers, Coinone may challenge the sanctions through legal channels while simultaneously implementing compliance upgrades.
Part of a Broader Korean Enforcement Push
The action against Coinone is part of a broader enforcement cycle targeting South Korea’s largest crypto exchanges. The FIU has been rolling out sanctions in the order its inspections were completed. Upbit, operated by Dunamu, previously received a similar three-month partial suspension and a fine, and has already filed an administrative lawsuit. Bithumb reportedly faced even harsher penalties, including a 36.8 billion won fine and a six-month partial suspension.
Seen in that context, Coinone’s penalties appear consistent with the scale of the violations identified during inspection. Rather than treating the exchange as a standalone example, regulators are signaling that compliance failures across the sector will be addressed through sustained and formal enforcement.
Compliance Pressure Across the Crypto Market
The case highlights how South Korea continues to treat AML and KYC enforcement as a core pillar of crypto market oversight. For exchanges, the regulatory message is clear: weak onboarding controls, incomplete transaction monitoring, and dealings with unregistered offshore venues can lead to heavy financial penalties and direct operational restrictions.
For Coinone, the immediate challenge will be managing the business impact of the suspension while accelerating compliance remediation. For the wider market, the message may be even more important. Other exchanges still awaiting final decisions may now face added urgency to strengthen internal controls before the FIU completes the current review cycle.
In practical terms, South Korea appears to be reinforcing a regulatory model in which access to the domestic crypto market depends not only on size and market share, but on demonstrable compliance discipline. Coinone’s case shows that regulators are willing to use both fines and targeted service restrictions to force that discipline into place.