Author: Claude, Shenchao TechFlow
Many crypto users are accustomed to transferring assets to on-chain self-custody wallets, believing that holding their own private keys shields them from third-party interference. However, a recent lawsuit disclosed in the U.S. District Court for the Southern District of New York reveals another side of centralized stablecoins in terms of legal and risk management: Tether is accused of unilaterally freezing over $42 million in USDT belonging to two investors nearly four months before a court-issued seizure warrant was formally issued.
Case reconstruction: Search warrant delayed by four months, even “misattributed”
According to court documents disclosed by Bitcoin.com, the timeline and details of the event are as follows:
On October 30, 2025, Tether blacklisted 10 Ethereum addresses belonging to two Thai investors without prior notice or any formal legal documentation, instantly freezing a total of $42,417,785 in USDT.
The court warrant for the lawful seizure of assets was not officially approved and issued until February 19, 2026, nearly four months later.
Even more unfairly, the subsequent search warrants stemmed from an investigation into a $17 million “pig butchering” investment scam in North Carolina, USA. The plaintiff insists they never participated in any fraudulent activity, and the seizure of their funds was purely a case of collateral damage and misidentification in law enforcement coordination; the plaintiff only learned the truth months after their assets were frozen.
Currently, two investors have formally filed a civil lawsuit in the U.S. District Court for the Southern District of New York, demanding that Tether lift the blacklist restrictions and compensate for related losses.
Tether's technology and freeze rights
This case is not an isolated incident; it highlights the significant gap between the circulation of centralized stablecoins on public blockchains and their actual control.
Although USDT operates on public blockchains such as Ethereum and Tron, its underlying token contract includes a hardcoded Blacklist mechanism. Tether’s multisig management private keys hold supreme authority and can unilaterally call functions to mark any address as frozen at any time. Once blacklisted, the USDT within that address cannot be transferred out nor accessed by any DEX or lending protocol.
In traditional banking, freezing an account typically requires a rigorous legal process involving investigation, evidence collection, and a judge’s signed court order. On-chain, Tether maintains an extremely close collaboration network with law enforcement agencies such as the U.S. Department of Justice, the FBI, and the Secret Service.
Official data shows that Tether has frozen over $4.4 billion in USDT across more than 2,300 cases. In practice, to prevent suspicious funds from being quickly laundered on-chain, the compliance team often immediately blacklists addresses upon receiving informal “assistance requests” or “asset preservation requests” from law enforcement, resulting in significant delays in obtaining formal judicial authorization.
Can stablecoins in a self-custody wallet truly serve as a "safe haven"?
First, it is necessary to recognize the legal nature of the assets.
Native crypto assets held in non-custodial wallets (such as MetaMask or Ledger), like BTC and ETH, are indeed censorship-resistant; however, centralized stablecoins like USDT are essentially licensed digital USD IOUs mapped onto public blockchains, with ultimate control always retained by the issuer.
In cross-departmental and cross-border joint enforcement operations, false positives and false freezes are inevitable. Once an address is unfortunately flagged, ordinary users rarely have the financial resources or time to pursue international legal action to appeal and unfreeze their assets.
For large-scale, long-term value storage needs, carefully assess the single-point exposure risk of centralized stablecoins, and clearly distinguish between their role as a daily transaction medium and their function as a censorship-resistant underlying reserve.
Risk Disclaimer:
According to the Notice on Further Preventing and Disposing of Risks Related to Virtual Currency Trading and Speculation, jointly issued by the People's Bank of China, the Central Cyberspace Administration, the Supreme People's Court, and nine other departments, virtual currencies do not have the same legal status as fiat currency, are not legal tender, and should not and cannot be used as money for circulation or transactions in the market.
Virtual currency-related business activities constitute illegal financial activities, and participating in virtual currency investment and trading carries legal and regulatory risks. Any civil legal acts involving investment in virtual currencies and related derivatives by legal entities, unincorporated organizations, or individuals that violate public order and good customs shall be invalid, and any resulting losses shall be borne solely by the parties involved.
This content is solely for summarizing overseas industry developments and objective events and does not constitute any investment advice or asset endorsement.