6.65 Million Violations

South Korea's Financial Intelligence Unit (FIU) has imposed a 36.8 billion won ($24.6 million) fine on Bithumb, one of the country's largest exchanges, after uncovering approximately 6.65 million violations of anti-money laundering (AML) rules. The exchange has also been ordered to suspend new user registrations for six months, though existing customers retain full access to trading and fund transfers.

The violations fall into two categories: 3.55 million failures to conduct required customer identity verification, and 3.04 million instances where the exchange failed to block transactions that should have been flagged. Both categories fall under the Act on Reporting and Using Specified Financial Transaction Information, according to the Financial Services Commission (FSC).

The scale of non-compliance is striking. At 6.65 million violations, Bithumb averaged thousands of compliance failures per day over the inspection period. Each unverified customer and each unblocked transaction represented a potential vector for money laundering, fraud, or sanctions evasion that the exchange's systems failed to catch. The FIU also imposed personnel penalties: Bithumb's CEO received a formal reprimand, while the exchange's designated reporting officer was handed a six-month suspension.

A Pattern of Enforcement

The fine follows on-site inspections of South Korea's five largest exchanges (Upbit, Bithumb, Coinone, Korbit, and Gopax) conducted between 2024 and 2025. Bithumb is not the first to face consequences. Last year, Upbit operator Dunamu received a three-month partial suspension and a 35.2 billion won fine for similar violations. Korbit was hit with 2.73 billion won in penalties.

The pattern is unmistakable: South Korean regulators are methodically working through every major exchange in the country. The combined fines levied against Bithumb, Upbit, and Korbit now exceed 74 billion won (approximately $50 million). The remaining two from the inspection cycle, Coinone and Gopax, have yet to face public enforcement actions, but the trajectory is clear.

Adding to Bithumb's difficulties, the exchange accidentally distributed billions in bitcoin to users just one month before this penalty was announced, raising further questions about its operational controls.

Why It Matters

South Korean regulators are not making examples. They are executing a systematic audit of every major exchange, finding violations numbering in the millions at each one. This is not a one-off enforcement action; it is a campaign.

For South Korean Bitcoiners, the message is urgent: shore up your opsec now. Exchanges that fail AML checks are exchanges that could face further restrictions, account freezes, or forced reporting of user activity at any moment. The safest response is to move bitcoin into self-custody and build peer-to-peer networks for buying and selling before the regulatory pressure escalates further. Your keys, your coins. Their exchange, their rules.