South Korea detected 1,214 crypto money laundering cases in the first half of 2026 — a 152-fold jump from the 8 cases logged in all of 2025. Most of that activity ran through a loophole known as Hwanchigi, which accounts for $6.4 billion of the $7.1 billion in illegal crypto transactions recorded since 2021, according to a Crystal Intelligence report.
How Hwanchigi works
The method exploits cryptocurrency transfers to move illicit money offshore without touching South Korea's regulated banking system. Investigators say it's become the go-to channel for laundering, and the numbers back that up. Money laundering now makes up 79.4% of all crypto offenses detected in the first half of 2026, displacing investment fraud, which had accounted for 92% of crypto crime through last year.
Tether's role
The preferred vehicle for these laundering operations is Tether (USDT). Stablecoins let criminals park value without the volatility that would draw attention. The shift from fraud to laundering is stark: fraud was the story for years, but laundering has taken over.
Enforcement gap
Arrests haven't kept pace. Police made only 18 arrests for crypto money laundering in the first half of 2026, compared to 42 in 2023 — even though they detected nearly 100 times more cases. In June, Seoul Metro Police charged 23 individuals over a laundering network tied to a Cambodia-based phishing group and confiscated $431,000, but the alleged ringleader remains at large under an Interpol Red Notice. A month later, investigators froze $12 million in XRP and Tether after a fake Flare Network staking site drained $8.6 million from 71 investors.
Customs and unlicensed channels
The Korea Customs Service seized 7.2 trillion won ($4.92 billion) in illegal foreign exchange transactions in the first half of 2026, including export companies that accepted crypto to bypass repatriation rules. Over 90% of the 9.5 trillion won in crypto-linked crime referred for prosecution ran through unlicensed channels, not regulated banks.
The Interpol Red Notice for the alleged ringleader is still active, and no arrests have been made in the July Flare Network case. That leaves a widening gap between detection and enforcement.
