Tether, which has recently come to the fore with the issuance of centralized stablecoins, has frozen USDT worth over $514 million, which was found to be linked to illegal transactions, on both Tron and Ethereum in the last 30 days. Data from on-chain analysis platform BlockSec’s USDT Freeze Tracker shows that the vast majority of freezes occur on the Tron network.
Distribution of Freezing Processes
According to the data, a total of 370 addresses were blacklisted. 328 of these addresses were in the Tron network and 42 were in the Ethereum network. Of the total amount frozen, approximately $505.9 million was blocked in Tron addresses, and $8.73 million was blocked in Ethereum addresses. According to BlockSec’s analysis, Tether throughout 2025; It seized a total of $1.26 billion worth of USDT in Ethereum and Tron and added 4,163 different addresses to the blacklist during this period.
Previous Year Data and Expanding Operations
While the company’s auditing and freezing activities have accelerated in recent years, more than half of the USDT frozen in 2025—approximately $698 million—was permanently removed from circulation with the “destroyBlackFunds” function within Tether’s smart contracts. The rate of addresses removed from the blacklist remained at only 3.6 percent. According to research conducted by various institutions between 2023 and 2025, Tether froze approximately 3.3 billion dollars in a total of more than 7,200 addresses. This figure is significantly higher than the sanctions imposed by rival stablecoin Circle for the same period.
Sanctions, Crime and Collaborations
In recent years, Tether has carried out many operations against wallets found to be linked to cybercrime, fraud and international sanctions violations. Starting from 2023, the company has further intensified these transactions as regulatory and legal pressures on the sector increase. In the data made available to the public in February 2024, it was announced that Tether had frozen $4.2 billion worth of tokens associated with suspicious means in three years.
In April, Tether stated that, working with the US Treasury Department’s Office of Foreign Assets Control and law enforcement agencies, it froze more than $344 million USDT at two Tron addresses linked to Iran-related sanctions violations. It was emphasized that in February, more than $61 million USDT was seized in cooperation with the authorities in crypto fraud operations called “pig butchering”.
Tether is a pioneer in auditing practices in the fixed coin market, acting in partnership with authorized institutions, especially in the field of regulations and global sanctions. If the company’s current pace continues, it is predicted that the amount of USDT frozen may exceed 2025 levels before the end of 2026.
It was stated that Tether had frozen more than $514 million USDT in total on the Ethereum and Tron blockchains in the last 30 days alone due to suspicious transactions. The majority of the frozen funds were located in the Tron network, and the company added a total of 370 addresses to the blacklist in the process.
