South Korea orders real-time checks at crypto exchanges after Bithumb’s $40b error

FSC orders five‑minute balance checks, auto kill switches, and monthly audits at Korean crypto exchanges after Bithumb’s $40b payout error.

South Korea’s Financial Services Commission (FSC) has ordered all domestic centralized exchanges to implement automated five‑minute reconciliation between internal ledgers and actual wallet balances by the end of May, after Bithumb’s mistaken distribution of roughly $40 billion in Bitcoin revealed systemic control failures. The mandate comes after regulators found that three of the country’s five major platforms were still running 24‑hour balance checks, leaving users exposed to undetected shortfalls. An FSC official said the authority had “prepared a continuous balance reconciliation system to enable immediate action when discrepancies arise,” adding that the five‑minute interval was set “in light of average processing times and system load.”

The overhaul follows a February promotion in which Bithumb staff “misentered the unit as ‘Bitcoin,’” sending 2,000 BTC per person instead of a planned 2,000 won cash reward and creating an estimated 62 trillion won (about $39.9 billion) mismatch. Bithumb later acknowledged that it had “failed to uphold the primary principles of virtual asset trading platforms: stability and integrity,” apologizing to customers and pledging full compensation for losses tied to panic selling. According to Bithumb’s subsequent statements, the exchange froze affected accounts within about 20 minutes and has committed to restoring all client balances, including a 110% reimbursement for those who sold during the crash window.

Under the FSC’s directive, exchanges must deploy automated systems that continuously compare ledgered client assets against holdings in hot and cold wallets, log every check, and automatically halt trading when “large mismatches are detected.” The kill‑switch requirement is designed to formalize circuit breakers that many platforms either lacked or operated manually, a gap regulators say contributed to delayed responses during the Bithumb event.

The rule set also tightens external oversight, upgrading accounting reviews from quarterly to monthly and requiring firms to disclose the quantity of assets held in each wallet, rather than a single coverage ratio. High‑risk and manual payout accounts must be segregated, with “third‑party cross‑check” and multi‑level authorization on large transfers to reduce insider and operational risk. Officials plan to fold the measures into a broader virtual‑asset bill, extending a regulatory push that previously focused on user protection in exchange insolvencies.

The FSC has already probed local trading fees and lending practices as part of efforts to lower costs and curb risk for domestic crypto users. Bithumb, for its part, told regulators it will cooperate fully and upgrade its systems with “improved asset verification processes, multi‑step payment approvals, and the implementation of an AI‑driven safeguard system to monitor for abnormal transactions around the clock.”