Most of the frozen funds, approximately $505.9 million, were linked to Tron addresses. The latest enforcement activity adds to Tether’s growing blacklist operations, which saw the company freeze around $1.26 billion across more than 4,100 addresses in 2025 alone. Tether Freezes Over $514M in USDT Tether froze more than $514 million worth of USDT across the Ethereum and Tron blockchains over the past 30 days. This is according to new on-chain data from BlockSec’s USDT Freeze Tracker. Data from the tracker shows that 370 addresses were blacklisted during the period, with the overwhelming majority of enforcement actions taking place on the Tron network. Out of the total frozen amount, approximately $505.9 million was immobilized on Tron, while around $8.73 million was frozen on Ethereum. In total, 328 Tron addresses and 42 Ethereum addresses were blacklisted. Tether’s freeze activities over the past 30 days (Source: BlockSec ) The latest enforcement activity forms part of a trend of freezes by Tether, which has become one of the most active centralized players in the crypto industry when it comes to blocking suspicious funds. According to BlockSec’s analysis of 2025 data , Tether blacklisted 4,163 unique addresses on Ethereum and Tron last year alone,and froze approximately $1.26 billion in USDT. At the current pace, the amount of frozen USDT in 2026 could surpass those totals well before the year ends. The analysis also revealed that more than half of the frozen USDT from 2025, roughly $698 million, was later permanently removed from circulation through the “destroyBlackFunds” function that is embedded in Tether’s smart contracts. Only a small fraction of blacklisted addresses, around 3.6%, were eventually removed from the blacklist. Tether’s enforcement efforts have expanded quite a bit over the past few years. Separate research covering the period between 2023 and 2025 estimated that the company immobilized nearly $3.3 billion across more than 7,200 addresses, which is far more than the enforcement activity conducted by rival stablecoin issuer Circle during the same period. The company also publicly disclosed several major cases tied to sanctions evasion, fraud, and crypto scams. In February, Tether stated that it froze approximately $4.2 billion in tokens over a three-year period in connection with illicit activity investigations. Much of that enforcement activity intensified after 2023 as regulators and governments increased pressure on the crypto sector. More recently, in April, Tether said it worked alongside the US Treasury’s Office of Foreign Assets Control and law enforcement agencies to freeze more than $344 million in USDT tied to two Tron addresses allegedly connected to sanctions evasion involving Iran. Earlier in February, the company also assisted authorities in seizing more than $61 million in USDT associated with “pig butchering” scams.
