Key Insights
- Bithumb gets legal momentum — Two court wins bolster its claim to the wrongful Bitcoin credits.
- A system error, which was due to a simple error, led to massive exposure — An employee entered BTC rather than KRW, which resulted in a 620,000 BTC internal credit.
- This incident has spurred stronger exchange control measures, including South Korea’s new stricter ledger checks and approval systems.
Bithumb won a second South Korean court ruling on August 27 over Bitcoin mistakenly credited during a February promotion. The decision strengthens the exchange’s effort to recover customer proceeds while regulators examine the operational failure.
The Seoul Central District Court ordered one defendant to return about 194 million won. That amount equals roughly $140,000 and represents the second-largest of four related claims.
Regulatory Fallout Raises the Stakes
The South Korean regulators reacted to the Bithumb error by asking for enhanced regulation of the cryptocurrency exchanges. The Financial Supervisory Service also started a sanctions procedure following its investigation into how the exchange has been able to cause such a significant discrepancy in their internal books.
Automated balance recon was ordered every 5 minutes by authorities. They also recommended enhanced approvals and separate controls and further approval for high risk manual transactions.
The measures would have a significant impact on exchange business in South Korea. In the Bithumb incident, the company’s internal accounting led to market disruptions without needing to breach the blockchain.
Court Rulings Build Momentum for Bithumb
Judge Kim Yu-seong of the court’s 90th Civil Division ruled for Bithumb in the latest case. The court treated the disputed proceeds as unjust enrichment and ordered repayment.
A separate ruling arrived on August 26 involving about 5 million won. Both cases used public notice service because ordinary delivery could not reach the defendants.
Bithumb filed four civil claims in March against users who sold the mistakenly credited Bitcoin. The reported claims total about 714 million won.
Two cases remain unresolved. They involve approximately 500 million won and 14.8 million won. The latest rulings do not automatically determine those remaining cases. Each defendant can present separate arguments, while the August 27 decision can also face an appeal.
A Promotion Triggered the Massive Ledger Error
Bithumb has announced that it will reward 620,000 won at a promotional event on 6th February. The employee chose Bitcoin instead of the Korean won as the reward.
The system then deposited 620,000 BTC into customers’ wallets. The amount was much more than Bithumb’s real Bitcoin, and most of it was still in its internal ledger. The error was detected by the exchange in about 20 minutes. It then limited trading and withdrawals of affected accounts.
Bithumb stated that it was limited to 695 customers and took about 35 minutes to process. Some recipients already sold Bitcoin prior to the enactment of such controls.
The Bitcoin price on Bithumb temporarily fell around 17% from the market prices due to those sales. The exchange then had its assets recovered with the majority of the lost assets recovered.
Bithumb has claimed to retrieve 618,212 BTC, which is 99.7% of the wrongly credited BTC. During the initial response, some 1,788 BTC were sold or otherwise unrecovered.
Regulatory Scrutiny Extends Beyond the Courtroom
The lawsuits form only part of the consequences for Bithumb. South Korea’s Financial Supervisory Service has also examined how the exchange allowed such a large ledger discrepancy.
The regulator reportedly issued an inspection opinion in early August. That step begins a sanctions process, although authorities have not announced a final penalty. South Korean regulators have also demanded stronger safeguards across cryptocurrency exchanges. The measures include automated balance reconciliation every five minutes and additional verification for high-risk payments.
Exchanges must also strengthen approval procedures and separate certain operational accounts. These requirements reflect concerns about internal controls rather than Bitcoin’s market behavior.
Bithumb therefore faces two distinct pressures. Courts are addressing recovery from customers, while regulators are examining the exchange’s own systems. The episode also focuses on a broader security and exchange operations dichotomy between blockchain and its security. A secure blockchain cannot prevent losses caused by faulty internal accounting systems.
Bithumb’s recovery strategy shows the financial consequences of that distinction. The exchange seeks customer proceeds, while regulators separately assess whether its controls met required standards.
The company also faces other legal and regulatory matters unrelated to the February error. Those proceedings add further scrutiny as South Korea strengthens oversight of major crypto platforms.
Conclusion
Bithumb’s two wins are a boost for the company as it looks to get its money back from the February mistake. But the rest of the lawsuits will tell whether that momentum will continue.
Reimbursements to customers are not the only repercussions. The South Korean authorities have strengthened the exchange regulations, and Bithumb exchange is under further investigation of the internal system.
The incident marks a significant operational threat for the broader crypto sector. A simple accounting error can cause disruption to the market, legal conflict and regulation.
