Criminal Liability for Crypto OTC Transactions in Korea: Proceeds of Crime Concealment & Defense Strategy
“I just sold crypto and received cash.”
In practice, this explanation is no longer sufficient to avoid criminal liability in Korea.
According to data released by the Korea Customs Service and the Financial Intelligence Unit (FIU) in February 2026, illegal foreign exchange transactions (“hwanchigi”) over the past five years reached KRW 11.5 trillion, with approximately 83% (KRW 9.5 trillion) involving virtual assets.
In 2025 alone, suspicious transaction reports (STRs) related to money laundering hit a record high of 1.3 million cases, increasing by 300,000 compared to the previous year.
A pending 2026 amendment to Korea’s Anti-Money Laundering regime is expected to expand the Travel Rule to transactions under KRW 1 million and grant the FIU authority to freeze suspicious accounts.
Even small OTC crypto transactions are now actively monitored and traceable.
1. How the Act on Concealment of Criminal Proceeds Applies to Crypto OTC Transactions
In practice, prosecutions typically arise through the following structures:
▪ Receiving USDT from non-residents and paying KRW domestically
This structure may trigger both violations of the Foreign Exchange Transactions Act and the Act on Regulation and Punishment of Criminal Proceeds Concealment. Even if it appears to be a simple exchange service, it can be treated as illegal remittance or money laundering.
▪ “Lack of knowledge” is not always a valid defense
Even if the party claims they did not know the counterparty was involved in criminal activity, courts may infer knowledge based on transaction size, frequency, and the use of cash. Korean courts increasingly apply a “should have known” standard based on objective circumstances.
▪ Even intermediary roles can lead to criminal liability
Individuals who only handled KRW transfers—without directly trading crypto—have been convicted as accomplices if their actions contributed to the concealment or transfer of criminal proceeds.
The key issue is not the form of the transaction, but the overall structure and role within the flow of funds.
2. Penalties — Multiple Laws Apply Simultaneously
Crypto OTC cases in Korea rarely involve a single charge. The following statutes are often applied in parallel:
▪ Unregistered Virtual Asset Business (VASP) – Act on Reporting and Use of Certain Financial Transaction Information
→ Up to 5 years imprisonment or a fine up to KRW 50 million
▪ Acquisition, possession, or disposal of criminal proceeds – Act on Concealment of Criminal Proceeds
→ Up to 5 years imprisonment or a fine up to KRW 30 million
▪ Unreported foreign exchange transactions – Foreign Exchange Transactions Act
→ Up to 3 years imprisonment or a fine up to KRW 300 million
▪ Confiscation and forfeiture
→ Full confiscation or preservation of assets related to criminal proceeds
Because these laws can be applied cumulatively, underestimating exposure based on a single charge can lead to serious misjudgment of legal risk.
3. Real Case — KRW 580 Billion OTC Operation Leading to Indictment
In a recent case, the operator of an unregistered crypto OTC business was indicted and detained for transactions totaling approximately KRW 580 billion.
The case involved the laundering of KRW 23.5 billion in proceeds from crypto fraud, which were used to purchase real estate under borrowed names. Authorities imposed asset preservation measures to secure confiscation.
Notably, individuals who did not directly commit fraud but participated in the money flow structure were also prosecuted.
The argument that “I only facilitated transfers” was rejected by the court.
4. Defense Strategy — Varies by Investigation Stage
Early response is critical in these cases, and the strategy must be tailored to each stage:
▪ Account Freeze Stage
Immediate legal review is required to assess grounds for lifting the freeze and limiting asset preservation. Delays can significantly expand the scope of frozen assets.
▪ Summons (Witness/Suspect Stage)
Attending an interview alone and providing unstructured answers is highly risky. Statements should be prepared in advance with counsel, focusing on transaction details and knowledge of fund origins.
▪ Submission of Transaction Records
Submitting records without legal review may expose unnecessary risks. The scope, format, and explanation of submitted materials should be strategically controlled.
A misstep in early statements can directly affect indictment decisions, detention, and confiscation scope. These cases often involve both administrative sanctions and criminal proceedings, requiring a dual-track defense approach.
5. Frequently Asked Questions
Q. I only sold crypto and received cash. Can I still be punished?
Yes. Depending on the structure, frequency, and source of funds, the transaction may be classified as illegal remittance or money laundering—even if it appears to be a simple sale.
Q. I didn’t know the counterparty was involved in crime.
Lack of knowledge is a key defense, but authorities often argue that you “should have known” based on objective circumstances. Early legal strategy is essential.
Q. What should I do if my account is frozen?
You should immediately review the legal basis and explore options for lifting the freeze. Timing is critical.
Legal Guidance for Crypto OTC Cases in Korea
If you have received notice of an account freeze or contact from an investigative authority, your initial response can significantly impact the outcome.
Decent Law Firm’s Digital Asset Team has extensive experience handling crypto OTC, illegal remittance, and USDT-related money laundering cases. Our approach goes beyond criminal defense—we analyze transaction structures and fund flows to build a comprehensive strategy.
