South Korea tightened its crackdown on cryptocurrency platforms, with Coinone receiving a 5.2 billion won fine and a three-month partial suspension over anti-money-laundering failures, according to local media reports citing regulatory authorities. The Financial Intelligence Unit (FIU) under the Financial Services Commission said the exchange fell short on key AML obligations, including identity verification in roughly 70,000 cases.
Authorities also flagged activity that suggested gaps in due diligence. Coinone processed more than 10,000 transactions involving 16 overseas platforms that were not registered with domestic regulators, despite prior warnings. The FIU noted that some accounts were marked as fully verified even when essential information was missing, and that transactions were not restricted for users whose verification was incomplete, underscoring weak internal controls.
The FIU’s action includes a three-month partial suspension, during which new customers will be barred from deposits and withdrawals. Coinone’s chief executive, Cha Myung-hoon, received an official reprimand, though the sanction is administrative rather than criminal. The exchange has 10 days to challenge the decision before it becomes final.
Key takeaways
- Price move: Not applicable — Coinone is a crypto exchange, not a publicly traded company; no direct stock price impact reported.
- Catalyst: AML lapses and inadequate verification and due-diligence practices flagged by the FIU, plus unregistered overseas transactions.
- Implications: Signals tighter regulation of domestic exchanges, potential operational disruption for Coinone, and heightened scrutiny across the sector as authorities push for stronger controls and faster reporting.
What drove the move
The enforcement action against Coinone comes amid a broader regulatory push to harden anti-money-laundering safeguards in South Korea’s crypto sector. Local authorities have argued that gaps in internal controls and insufficient verification processes pose risks to financial integrity and consumer protection. The fine and suspension represent a material deterrent intended to push exchanges to upgrade compliance programs, particularly around customer due diligence and cross-border activity.
The case follows a high-profile penalty against another major domestic exchange. In March, Bithumb was fined $24 million and hit with a six-month partial suspension over AML shortcomings. Regulators highlighted a separate incident at Bithumb in which 620,000 Bitcoin were mistakenly sent during a promotional event, a misstep that drew intense scrutiny of internal controls and risk-management practices across the sector.
Beyond enforcement actions, regulators have signaled a broader tightening of the operational framework governing crypto platforms. The Bank of Korea has pressed lawmakers to consider rules that would empower exchanges to halt trading during abnormal activity or sudden price swings, a move aimed at preventing cascading market stress during outages or mispriced events. This elevated oversight is advancing in parallel with structural changes intended to improve transparency and resilience within the ecosystem.
Market reaction
The regulatory environment surrounding crypto exchanges in South Korea remains under close watch by investors and participants. While the Coinone decision does not translate into immediate price data, it reinforces a risk-averse stance toward exchanges and may weigh on sentiment across the sector. The Bithumb case last quarter had already heightened expectations for stricter controls and faster compliance cycles, a trend that could influence capital flows and liquidity in domestic crypto markets.
Regulators are moving toward a more hands-on approach to supervision. A key element of the new framework is tighter ledger reconciliation — exchanges must reconcile internal ledgers with actual asset holdings every five minutes, a shift from prior practice, which in some platforms occurred only once every 24 hours. The aim is to improve real-time visibility into asset positions and to enable quicker intervention if discrepancies arise.
Under the updated rules, exchanges are required to set automatic transaction-halting thresholds when mismatches exceed defined limits. Supervisors also plan to strengthen internal processes around high-risk activities, such as promotional payouts, which will require multi-level approvals and third-party checks. Audit cycles are being shortened from quarterly to monthly, and reporting requirements will demand more granular disclosures of wallet balances and internal records. The Financial Services Commission has said it expects to complete the necessary rule changes to implement these measures within April this year.
Data from the FSC indicates that capital has continued to move away from local platforms, with crypto outflows totaling around 90 trillion won in the second half of 2025, up from about 78.9 trillion won in the first half. The outflow trend adds urgency for regulators to restore confidence in exchange operations and ensure a safer, more transparent trading environment for participants.
What analysts are saying
Analysts view the Coinone decision as part of a widening crackdown that aims to deter lax AML practices and to strengthen market integrity in a sector that has drawn growing attention from policymakers. The penalties underscore the risk that exchanges face if compliance programs lag peers or fail to keep pace with evolving rules. While the immediate impact is regulatory, the longer-term effect could be higher compliance costs, potential changes to business models, and a cautious outlook for liquidity in domestic crypto markets as firms invest to shore up controls.
Bigger picture
The Coinone action, coupled with the Bithumb penalty and the Bank of Korea’s proposed trading-halting framework, highlights a shifting regulatory landscape for cryptocurrency in South Korea. The push toward more frequent reconciliations, stricter approval processes for high-risk activities, and expanded disclosure aligns with a global trend toward greater transparency and risk management in crypto markets. As authorities seek to improve resilience and consumer protection, investors will be watching how quickly exchanges integrate new requirements and how the market adapts to higher compliance costs and tighter operational controls.
What to watch next: Coinone has 10 days to contest the FIU’s decision, and any outcome could influence the enforcement trajectory for other local platforms. The FSC said it expects to implement the improvement measures within April, with the Bank of Korea continuing to encourage legislative action to enable risk controls like trading halts. Monitor forthcoming regulatory filings, updates on cross-border transaction oversight, and any further penalties or license actions against other exchanges as the regime consolidates its approach to AML and market integrity.
