Tether, the world’s largest stablecoin issuer, has reportedly frozen $4.2 billion worth of its USDt tokens connected to suspected illegal activities over the past three years.
Most of the blocked funds were restricted since 2023, as regulators and law enforcement agencies ramped up their scrutiny of crypto-related fraud and sanctions evasion, according to a report from Reuters. Tether’s USDt (USDT) token, which is pegged to the U.S. dollar, has seen its market cap surge to over $180 billion, up from about $70 billion three years ago, reflecting its growing importance in the crypto ecosystem.
Collaboration with Authorities
Tether can freeze tokens directly on the blockchain by blacklisting wallet addresses when requested by authorities. The company has been increasingly proactive in assisting government efforts to combat financial crimes. On Tuesday, Tether announced it had helped the U.S. Department of Justice seize nearly $61 million in USDt tied to ‘pig-butchering’ scams, a scheme where criminals build relationships with victims before persuading them to send money.
Significant Actions in 2023
Earlier this month, Tether also froze approximately $544 million in cryptocurrency at the request of Turkish authorities, blocking funds linked to an alleged illegal online betting and money-laundering operation. According to blockchain analytics firm Elliptic, by late 2025, stablecoin issuers Tether and Circle had blacklisted around 5,700 wallets holding about $2.5 billion, with roughly three-quarters of the addresses containing USDt when they were frozen.
Market Impact and Future Outlook
The freezing of such a significant amount of tokens has had a noticeable impact on the crypto market. As of February, USDt is on track for its largest monthly supply drop in three years, with circulating supply falling about $1.5 billion, following a $1.2 billion decline in January. This contraction mirrors the period following the FTX collapse in late 2022 and may indicate tighter liquidity in crypto markets.
Tether attributes the figures to short-term distribution changes rather than a weakening demand, noting that USDC, another major stablecoin, also saw a multibillion-dollar reduction during the same period. The company’s actions highlight the growing role of stablecoins in the global financial system and the increasing scrutiny they face from regulators.
Looking ahead, the continued collaboration between Tether and law enforcement agencies is likely to shape the future of stablecoin regulation. As the crypto industry matures, the balance between innovation and compliance will remain a critical issue, with Tether playing a pivotal role in setting the standards for the sector.
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