Bithumb Takes South Korea’s FIU to Court Over Travel Rule Enforcement
TREE NEWS reports: Seoul Administrative Court held its first hearing on October 22 in a case brought by crypto exchange Bithumb against the Financial Intelligence Analysis Institute (FIU), challenging a six-month partial suspension that bars the exchange from allowing new customers to withdraw assets to external wallets. The dispute centers on 45,772 transfers made between August 2022 and April 2025 to 18 overseas crypto institutions that had not registered with South Korean authorities.
The Regulatory Gap: Sub-1 Million Won Transfers
Bithumb argues that the transfers in question were all below 1 million Korean won (approximately $720), the legal threshold for mandatory enforcement of the Travel Rule under the Specific Financial Information Act. For transfers at or above that amount, Bithumb had already implemented a whitelist mechanism that fully excluded unregistered foreign operators, resulting in zero violations in that regulated range. At the time of the transfers, regulations did not require information exchange for small transfers, leaving the platform without legal grounds to demand recipient exchange details from customers. Unilaterally blocking or requesting personal data for such transfers could violate privacy protection laws.
Chainalysis Data and the 98% False Positive Problem
Bithumb presented blockchain analytics from Chainalysis showing that among all external addresses with unconfirmed ownership, only about 2% were later identified by the FIU as deposit addresses of unregistered overseas operators. In a decentralized public blockchain environment, precisely identifying the commercial ownership of unmarked addresses ex ante is physically impossible. Blocking all addresses without confirmed institutional labels would have ensnared the remaining 98% of legitimate transactions, an unacceptable false positive rate for a licensed platform serving millions of investors. The defense argued that requiring exchanges to achieve 100%穿透 identification—which even advanced analytics firms cannot achieve—amounts to imposing strict liability.
Proportionality and the Six-Month Suspension
Bithumb further contends that the six-month suspension of new customer external withdrawals exceeds the necessary disciplinary scope. In the spot market, prohibiting new users from withdrawing assets for half a year effectively deprives the platform of its ability to attract and retain new customers, potentially shifting market share to competitors and pushing illicit funds toward untraceable underground channels. The defense also questioned the legality of the enforcement decree issued by the Financial Services Commission, arguing it oversteps the authorization boundaries of the parent law and lacks transparency and predictability in defining unregistered overseas operators.
Implications for Global Crypto Regulation
The case sets a critical precedent for how the Travel Rule is enforced at the edges, particularly for small transfers that fall below mandatory thresholds. A ruling in Bithumb’s favor could force regulators to provide clearer guidance and technical standards for blockchain analytics, while a loss could embolden aggressive enforcement across jurisdictions. The court has adjourned for further evidence on technical attribution and administrative discretion, with the outcome likely to shape compliance obligations for crypto exchanges worldwide.
