South Korea’s Financial Intelligence Unit (FIU), operating under the Financial Services Commission, has imposed a 5.2 billion won penalty on crypto exchange Coinone and ordered a three-month partial suspension of business after uncovering broad failures in anti-money laundering and customer verification controls.
The enforcement action follows an on-site inspection carried out as part of the regulator’s wider review of the country’s major virtual asset service providers. According to the findings, Coinone failed to properly handle customer identity checks in about 70,000 cases and processed transactions linked to 16 unregistered overseas virtual asset platforms, raising serious concerns about its compliance framework.
Inspection Findings Point to Systemic KYC Weaknesses
Regulators said Coinone’s violations were not isolated compliance errors but reflected broader weaknesses in internal controls. Of the roughly 70,000 problematic customer identity cases, around 40,000 involved unverifiable or incomplete identification documents. Another 30,000 cases allegedly involved users being allowed to trade before completing verification requirements.
In addition, the exchange was found to have facilitated about 10,113 transactions through 16 overseas exchanges that were not registered in South Korea. Authorities consider this a direct violation of the country’s Special Financial Information Act, which governs reporting obligations and compliance standards for financial transactions, including those involving digital assets.
The FIU also cited other shortcomings, including inadequate transaction monitoring, failures to report certain overseas exchange-related dealings, and the inability or unwillingness to halt restricted transactions even after regulators had requested action.
What the Suspension Means for Coinone Users
The partial suspension is scheduled to run from April 29, 2026, to July 28, 2026. During that period, new users will be unable to deposit, withdraw, or transfer virtual assets externally for crypto trading purposes. However, existing users will continue to have access to trading, deposits, withdrawals, and Korean won services.
Because current customers are not fully locked out, the FIU described the measure as a “partial” suspension rather than a full shutdown. Even so, the restrictions are likely to weigh on Coinone’s ability to onboard new customers and generate related revenues in the short term.
Coinone’s chief executive, Cha Myung-hoon, also received an official warning as part of the enforcement package. The exchange has 10 days to submit additional arguments regarding the fine before it is finalized, and it may choose to challenge the decision through an administrative lawsuit.
Coinone Signals Compliance Upgrades, Leaves Door Open to Legal Action
In response, Coinone said it is taking the matter seriously and is actively working to correct the compliance deficiencies identified by regulators. The company indicated that it would review the possibility of filing an administrative lawsuit after internal discussions, including deliberation at the board level.
For the exchange, the suspension creates both operational and reputational pressure. Limiting new-user activity and external wallet functions for three months may affect business growth, while the public nature of the sanction underscores the cost of weak AML and KYC controls in one of Asia’s most closely watched crypto markets.
At the same time, Coinone appears to be positioning the suspension period as an opportunity to strengthen its compliance systems. That approach could prove important as South Korean regulators continue to scrutinize virtual asset businesses more aggressively.
Part of a Broader South Korean Regulatory Crackdown
Coinone’s case is part of a broader enforcement campaign targeting the country’s major crypto exchanges. South Korea’s FIU has been rolling out penalties in the order that inspections were completed, signaling a methodical effort to raise compliance standards across the sector.
Other large trading platforms have already faced similar scrutiny. Upbit, operated by Dunamu, reportedly received a comparable three-month partial suspension and a fine, and has already filed an administrative lawsuit. Bithumb was hit with heavier sanctions, including a reported 36.8 billion won fine and a six-month partial suspension.
Seen in that context, Coinone’s punishment aligns with the scale of the violations identified by inspectors. The FIU has repeatedly framed these actions as necessary to enforce real-name verification standards and reduce money laundering risks in the virtual asset market.
Why the Case Matters for the Crypto Industry
The Coinone enforcement action highlights a continuing shift in South Korea’s approach to crypto regulation: authorities are not only setting rules but also showing willingness to impose meaningful penalties when exchanges fail to implement them. The message to the market is clear—customer due diligence, transaction surveillance, and controls over offshore counterparties are no longer treated as secondary compliance functions.
For the wider industry, the case serves as a reminder that AML and KYC standards can directly affect business continuity. Even a partial suspension can disrupt growth, weaken market confidence, and increase legal and operational costs. It also puts pressure on exchanges still awaiting final regulatory decisions to upgrade internal systems before inspections lead to similar outcomes.
As South Korea continues its review cycle, more trading platforms may face tougher oversight. In that environment, compliance is becoming a central competitive factor, not just a regulatory box to tick. Coinone’s penalty may therefore be remembered not only as a disciplinary event for one exchange, but as another sign that South Korea is pushing its crypto market toward stricter institutional standards.