South Korea's Largest Crypto Exchange Hit with Record Fine
South Korea's Financial Intelligence Unit (FIU) announced in early July 2026 that it has fined Bithumb, one of the country's largest cryptocurrency exchanges, 36.8 billion won ($24.6 million) and imposed a six-month partial suspension of services for new users. The penalties stem from on-site inspections of South Korea's five largest crypto exchanges conducted between 2024 and 2025.
The investigation uncovered approximately 6.65 million violations of the country's anti-money laundering (AML) and customer verification rules. Around 3.55 million cases involved failures to properly identify customers, while 3.04 million cases concerned transactions that should have been blocked but were allowed. Additionally, Bithumb facilitated 45,772 transactions with 18 unregistered overseas exchanges, seriously breaching AML regulations. The fine is the largest ever imposed on a virtual asset exchange in South Korea, edging past the 35.2 billion won penalty handed to Upbit in 2025. Authorities also issued a reprimand for Bithumb's CEO and a six-month suspension for the exchange's reporting officer. Existing customers can continue trading, but new user activities including deposits and withdrawals will be restricted.
Bithumb's Bitcoin Blunder
Just weeks before the FIU announcement, Bithumb experienced a serious operational error. The exchange planned to distribute small cash rewards through a 'Random Box' event at around 6 p.m. local time, with winners supposed to receive between 20,000 and 50,000 Korean won. However, staff mistakenly entered the payment unit as Bitcoin instead of won. As a result, some users received at least 2,000 Bitcoin each, worth approximately 196 billion won ($1.33 million) per person based on Bitcoin's price near 98 million won at the time.
The error briefly caused Bitcoin prices on the platform to drop over 10% below broader market levels. Bithumb stated the incident did not result in any customer losses. The FIU will finalize the fine after giving Bithumb at least 10 days to submit its opinion. Authorities emphasized that this enforcement action signals continued tightening of crypto market oversight in South Korea.
Regulatory Tightening and Market Impact
South Korean financial regulators have been intensifying compliance scrutiny on cryptocurrency exchanges in recent years. The heavy penalty on Bithumb demonstrates that even top-tier platforms are not immune to strict enforcement. Industry observers note that rigorous customer verification and AML obligations are critical to maintaining market trust, and exchanges must invest more resources in compliance systems. At the time of writing, Bitcoin is trading near $74,000, with the overall market adopting a cautious tone. South Korea may introduce stricter crypto asset regulations in the future to further standardize industry operations.