Tether says it has frozen about $4.2 billion in USDT linked to suspected illicit activity, with nearly $3.5 billion of that total blocked since 2023. This week, the company also worked with the U.S. Department of Justice to freeze roughly $61 million connected to pig-butchering scams, a form of long-running online fraud built around fake investment pitches.
USDT’s circulating supply has now moved past $180 billion, keeping it as the largest stablecoin in the digital asset market. One of the token’s core controls allows the issuer to freeze funds inside wallets when law enforcement requests action. That power has become a central part of anti-crime enforcement, but it also keeps the debate over stablecoin centralization alive.
Past wallet freezes span trafficking, terrorism financing, and sanctions cases
According to the source material, Tether has previously blocked wallets tied to human trafficking, terrorism financing, and conflict-related transactions involving Israel and Ukraine. Russian exchange Garantex also said last year that funds on its platform were restricted under sanctions pressure.
Regulators and international watchdogs have been warning for years that digital assets are being used in illicit finance. The Financial Action Task Force has urged countries to tighten oversight of crypto markets, which still face lighter regulation than traditional finance in many jurisdictions.
On-chain detection combines wallet analysis with outside intelligence
Blockchain researchers reported that money laundering through digital assets reached at least $82 billion last year, up sharply from about $10 billion in 2020. The growth of Chinese-speaking scam networks was identified as a major driver. Stablecoins remain heavily used for trading, cross-border transfers, and settlement, which helps explain why they appear so often in enforcement actions.
Tether’s screening process relies on blockchain monitoring tools that analyze wallet behavior, transaction clusters, and links to known scam addresses. The company also works with exchanges, analytics firms, and regulators to confirm high-risk activity. Wallets can be flagged when transaction patterns resemble phishing operations, ransomware networks, or pig-butchering schemes mapped across chains.
Enforcement may support trust, while centralization concerns remain
The source notes that freezing is largely a reactive tool. Longer-term controls would include stricter KYC standards, closer exchange surveillance, better cross-chain monitoring, and faster reporting systems. It also points to cooperation between the U.S., European countries, parts of Asia, and sanctioned jurisdictions as an important part of enforcement.
Market impact is mixed. Stronger compliance may improve confidence among regulators and institutional participants, yet critics argue that the ability to freeze wallet funds exposes a clear concentration of control inside stablecoins. As new regulated stablecoin projects compete for share, transparency and compliance capacity appear to be key factors for Tether’s position.