Filed in the morning. Overturned by the afternoon. That is how fast Bithumb won its biggest legal battle.
A Seoul Administrative Court judge accepted Bithumb’s appeal on the same day it was submitted, lifting a six-month partial business suspension that South Korea’s Financial Intelligence Unit had imposed in March. Judge Gong Hyeon-jin ruled that enforcing the ban would cause disproportionate harm to the exchange’s operations while the case is reviewed.
The FIU had accused Bithumb of 6.65 million violations of anti-money laundering rules. It slapped the exchange with a 36.8 billion won ($24.6 million) fine and ordered a suspension that would have blocked new users from depositing or withdrawing crypto. It was the most severe penalty ever imposed on a Korean won-based exchange.
Now the suspension is frozen. The fine is in legal limbo. And Bithumb is back to normal operations while the full court case plays out.
What Did Bithumb Actually Do Wrong?
A lot, according to the FIU. The 6.65 million violations break down into two main categories. About 3.55 million involved failures to properly verify customer identities. Another 3.04 million involved cases where the exchange failed to block transactions that should have been stopped under Korean AML rules.
The violations were discovered during on-site inspections of South Korea’s five largest exchanges, including Upbit, Bithumb, Coinone, Korbit, and Gopax, conducted between 2024 and 2025. Bithumb was not the only one caught. The FIU hit Upbit’s parent Dunamu with a three-month suspension and 35.2 billion won fine last year. Korbit got a smaller 2.73 billion won penalty.
But Bithumb’s was the harshest. Six months is a long time in crypto. Being blocked from onboarding new users for half a year while competitors operate freely could have permanently damaged the exchange’s market share.
Why Did the Judge Overturn It So Quickly?
The court focused on proportionality. Judge Gong emphasized the business impact of restricting Bithumb’s operations. Blocking new users from deposits and withdrawals for six months would effectively freeze the exchange’s growth while the legal case dragged on for potentially years.
The ruling does not mean Bithumb is innocent. It means the punishment was too severe to enforce while the case is still being decided. The suspension stays frozen until the court reaches a final judgment. If Bithumb loses the full case, the suspension and fine could be reinstated.
Think of it like bail. You are not found innocent at the bail hearing. You are found to deserve the right to operate freely while the trial continues.
The $43 Billion Bitcoin Blunder
The AML case is not Bithumb’s only headache. Two months ago, the exchange accidentally distributed billions of dollars worth of Bitcoin to users in one of the most embarrassing errors in exchange history.
During a February promotional event, Bithumb planned to send a total of 620,000 Korean won (roughly $430) split among 249 users. Someone entered the amount in BTC instead of won. The system processed the payments in Bitcoin, briefly crediting users with thousands of dollars worth of crypto instead of a few dollars each.
The error was caught and reversed within minutes. Most users returned the funds. But a small group refused. Bithumb has since filed a provisional seizure petition to freeze 7 BTC that certain users declined to give back. The exchange argues the recipients have no legal right to keep mistakenly transferred assets. Some recipients disagree.
South Korean lawmakers criticized regulators for missing the structural issues that allowed the error to happen in the first place. If an exchange can accidentally distribute billions in Bitcoin through a simple input mistake, questions about internal controls are hard to avoid.
What Does This Mean for South Korea’s Crypto Market?
South Korea is going through the same regulatory tightening that other major markets experienced in 2023 and 2024. The difference is scale. Korea has one of the most active retail crypto trading populations in the world. Upbit alone handles more daily volume than most global exchanges. When regulators crack down here, millions of traders feel it.
The FIU’s approach has been aggressive. Suspensions and multimillion-dollar fines for three of the top five exchanges in two years sends a clear message: compliance is not optional. The inspections covered every major platform, and every one of them was found lacking to some degree.
For Bithumb specifically, the court victory buys time but does not resolve the underlying issues. If the exchange committed 6.65 million AML violations, it needs to fix its compliance systems whether the fine stands or not. Regulators will be watching closely. And the next inspection could be even more thorough.
The broader context matters too. Japan is reclassifying crypto as financial products under its securities framework. South Korea is considering similar moves under the Digital Asset Basic Act. The new Bank of Korea governor wants CBDCs over stablecoins. The regulatory environment across Asia’s two largest crypto markets is tightening simultaneously.
For Bithumb, surviving the suspension is a win. But the larger fight over what crypto exchanges in Korea are allowed to do, and how strictly they will be policed, is just getting started.
