South Korea Tightens Exchange Controls, Mandates 5-Minute Balance Reconciliation
South Korea's financial regulator has instructed all domestic crypto exchanges to reconcile customer asset balances every five minutes after a major mistaken payout earlier this year undermined market confidence.
The new requirements follow an incident in February in which Bithumb, during a promotional campaign, mistakenly credited users with 2,000 BTC each instead of 2,000 Korean won (about $1.40). The error amounted to an estimated $42 billion in misallocated crypto.
The Financial Services Commission (FSC) launched emergency inspections across the country's five major exchanges. The regulator said the findings pointed to broader operational weaknesses: most venues reconciled accounts only once every 24 hours; three lacked an automated "kill switch" to stop trading when large discrepancies emerged; four did not have multi-step approval controls for high-risk manual transactions; and two had not segregated general accounts from high-risk transaction accounts.
On April 6, the FSC unveiled a three-pillar reform package. Exchanges must implement automated balance checks every five minutes, with alerts and automatic trading halts triggered by significant mismatches. The audit cadence will shift to monthly external audits from a quarterly schedule. Public disclosures will also be expanded to include asset-by-asset on-chain holdings rather than a simple coverage ratio.
For manual, high-risk operations such as event payouts, exchanges will be required to use segregated accounts, deploy validation systems that automatically reject mismatched inputs, and obtain third-party cross-verification before execution. The FSC will also require exchanges to appoint dedicated risk management officers and set up risk management committees, aligning expectations more closely with traditional financial institutions.
Regulatory compliance checks will move from annual reviews to twice-yearly inspections, with results reported to authorities. DAXA, the industry body, is expected to finalize self-regulatory amendments this month, with system upgrades to be completed by May. The key provisions are set to inform South Korea's forthcoming second-phase Digital Asset Act.
