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South Korea has reported a record-breaking number of suspicious cryptocurrency transactions in 2025, with figures from January to August already exceeding the combined totals of the previous two years. This alarming trend highlights growing concerns over illicit activities within the digital asset space.
Key Takeaways
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South Korean authorities flagged 36,684 suspicious transaction reports (STRs) between January and August 2025.
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This figure surpasses the combined STRs from 2023 (16,076) and 2024 (19,658).
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Illegal foreign exchange remittances, known as "hwanchigi," are the primary driver of these suspicious activities.
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Approximately 90% of crypto-linked crimes referred to prosecutors since 2021 are tied to "hwanchigi" schemes.
Record-Breaking Suspicious Activity
Data from South Korea's Financial Intelligence Unit (FIU) and the Korea Customs Service (KCS) reveals a dramatic increase in suspicious transaction reports (STRs) filed by virtual asset service providers (VASPs). Between January and August of 2025, a total of 36,684 STRs were filed. This number significantly eclipses the 16,076 STRs reported in 2023 and 19,658 in 2024, indicating a substantial escalation in illicit crypto activities.
"Hwanchigi" Schemes Drive Illicit Flows
South Korean officials have identified illegal foreign exchange remittances, or "hwanchigi," as the main culprit behind the surge in suspicious transactions. These schemes typically involve converting criminal proceeds into cryptocurrency on offshore platforms, routing them through domestic exchanges, and then cashing them out in South Korean won. Since 2021, the KCS has referred approximately $7.1 billion in crypto-linked crimes to prosecutors, with a staggering $6.4 billion (about 90%) attributed to these "hwanchigi" operations.
One notable case involved the uncovering of an underground broker accused of using the Tether (USDT) stablecoin to move around $42 million illegally between South Korea and Russia. This operation, carried out by two Russian nationals, involved over 6,000 illicit transactions between January 2023 and July 2024.
Calls for Strengthened Enforcement
In response to these findings, Representative Jin Sung-joon has urged government agencies, including the KCS and FIU, to enhance their enforcement measures. The focus is on effectively tracking criminal funds and blocking disguised remittances, with a call for systematic countermeasures against emerging foreign exchange crimes.
Global Regulatory Concerns
The situation in South Korea mirrors a broader global challenge for regulators. While digital currencies and stablecoins offer efficient payment solutions, they also present new avenues for illicit financial flows. International regulatory bodies are exploring various strategies, such as the European Union's Markets in Crypto-Assets (MiCA) regulation, which imposes licensing requirements on stablecoin issuers and caps transaction volumes to ensure transparency and mitigate risks associated with cross-border illicit activities.
Sources
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South Korea Flags Record Suspicious Crypto Transactions in 2025, Cointelegraph.
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South Korea Flags Record Suspicious Crypto Transactions in 2025, StartupNews.fyi.
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