• FSC and DAXA implemented unified rules after data showed 59% of fraud occurred via withdrawal exceptions.
• The stricter mandates are projected to slash withdrawal exception eligibility by more than 99%.
• FSS and DAXA will now conduct regular audits and annual fund verifications to prevent future smurfing.

South Korea’s financial regulators announced a major tightening of the “Virtual Asset Withdrawal Delay System” after discovering that lax exception standards were being exploited by voice phishing syndicates to launder criminal proceeds. The Financial Services Commission (FSC), the Financial Supervisory Service (FSS), and the Digital Asset Exchange Association (DAXA) confirmed that new, unified internal regulations will take effect immediately to close loopholes used by fraudsters.

The withdrawal delay system was originally launched in May 2025 to prevent mules from instantly moving stolen funds. However, according to an FSC media statement, a recent regulatory review revealed a critical vulnerability where individual exchanges were setting their own criteria for who could bypass these delays.

To support this assessment, the statement pointed to data from June to September 2025, which showed that 1,490 out of 2,526 fraudulent accounts were exempt from withdrawal delays. Total damages linked to these exemptions reached approximately $124 million (170.5 billion won), accounting for 75.5% of all voice phishing losses through cryptocurrencies during that period. Criminals found they could easily bypass security by meeting low-threshold criteria, such as maintaining an account for a short period or conducting a few small “wash trades” to establish a fake history.

Under the new mandate, all exchanges must follow a unified and stricter standard. These mandatory factors require exchanges to strictly analyze transaction frequency, total duration of the account and cumulative deposit and withdrawal amounts. The FSC has also specified conditions under which an exception can never be granted, regardless of trading history.

Simulations conducted by the FSC suggest these unified rules will slash the number of customers eligible for withdrawal exceptions by more than 99% by the end of 2025. Moving forward, customers who qualify for exceptions will face intensive monitoring, including a mandatory annual verification process to review the source of funds for all high- volume traders. Additionally, a new tracking system will be established to collect and analyze withdrawal data, allowing regulators to identify patterns of “smurfing” or rapid asset conversion that suggest criminal activity.

South Korean authorities will continue to allow immediate withdrawals in cases where the need is unrelated to financial crime. The FSS and DAXA plan to conduct regular audits to ensure exchanges are not circumventing the new standards, with immediate penalties for firms found to have vague internal controls.

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