South Korea Cracks Down on Crypto Withdrawal Loopholes Fueling Voice-Phishing Losses
South Korea’s top financial regulator is moving swiftly to close a critical loophole in cryptocurrency exchange security. The Financial Services Commission (FSC) announced new, unified standards for withdrawal-delay exemptions after discovering that accounts granted these exemptions were responsible for the vast majority of voice-phishing-related fraud losses.
This decisive action follows an internal review that revealed a startling pattern: from June to September 2025, accounts bypassing mandatory withdrawal delays constituted 59% of all fraudulent accounts and accounted for a staggering 75.5% of the associated monetary losses on crypto exchanges.
The Problem: Inconsistent and Lax Exception Rules
Previously, individual crypto exchanges in South Korea set their own criteria for allowing users to skip the standard waiting period for withdrawals. These often included relatively simple metrics like account age or basic trading history. The FSC found this patchwork system created an easy pathway for bad actors. By meeting these minimal requirements, scam-linked accounts could quickly move stolen funds out of the exchange, significantly hampering law enforcement efforts to trace and recover assets.
“Exchanges had been applying their own exception criteria with no clear minimum standard, creating loopholes that let bad actors quickly move funds if they meet easy requirements,” the FSC stated in its announcement.
The Solution: Unified, Stricter National Standards
Developed in collaboration with the Financial Supervisory Service (FSS) and the Digital Asset eXchange Alliance (DAXA), the new framework imposes a single, rigorous set of rules across all licensed exchanges. Under the strengthened system, exchanges must now comprehensively assess a user’s trading frequency, full account history, and patterns of deposit and withdrawal amounts before granting any exemption.
The regulator projects this will lead to a dramatic reduction in eligible users. A simulation cited by the FSC indicated that only about 1% of users would qualify for an exemption under the new criteria, though a baseline comparison figure was not provided.
Beyond tighter initial screening, the FSC will mandate enhanced ongoing monitoring. Exchanges must conduct periodic checks on exempted users, including verifying the source of funds, and implement systems to flag and investigate suspicious withdrawal activity in real-time.
“We will continue reviewing the rules to prevent new circumvention methods and adjust as needed,” the commission added, signaling a dynamic and adaptive regulatory approach.
Part of a Broader Regulatory Crackdown
This measure is the latest in a series of aggressive steps by South Korean authorities to fortify the crypto sector against fraud and operational failures. Just this week, the FSC ordered all crypto exchanges to reconcile their internal ledgers with actual asset holdings every five minutes. This emergency directive followed an inspection into a major payout error at Bithumb, one of the country’s largest exchanges, which exposed significant gaps in internal controls and risk management.
Furthermore, on January 29, South Korea expanded its crypto licensing scrutiny, extending deep background checks to not just exchanges themselves, but also their major shareholders. This aims to ensure governance integrity from the top down.
These cumulative actions reflect a growing national priority: transforming South Korea’s vibrant but vulnerability-exposed crypto market into a more secure and trustworthy ecosystem. By systematically dismantling the avenues for rapid, untraceable fund movement—a key enabler of voice-phishing scams—regulators are attempting to protect retail investors and restore confidence.
Related: South Korean brokerage Korea Investment & Securities eyes Coinone stake: Report
Magazine: ‘Phantom Bitcoin’ checks, Drift hack linked to North Korea: Asia Express
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