Tether freezes over $500M USDT in 30 days, BlockSec data shows

Stablecoin issuer Tether has carried out a wave of freezing actions on USDT holdings: BlockSec’s on-chain tracker recorded roughly $515 million frozen across Ethereum and Tron in the last 30 days, adding to about $1.26 billion frozen during 2025.

BlockSec’s analysis of 'AddedBlackList', 'RemovedBlackList' and 'DestroyedBlackFunds' events shows 4,163 unique addresses blacklisted in 2025 and significant subsequent destroy (burn) operations that removed large portions of frozen balances from circulation. High-profile enforcement requests bolstered these totals — for example, Tether complied with requests linked to investigations including a reported ~$544 million freeze at the request of Turkish authorities.

Market implications are material: observers note temporary reductions in USDT circulating supply and corresponding impacts on liquidity in exchanges and DeFi pools. Sudden freezes can force rebalancing in trading venues and increase counterparty and custody risk premiums for desks and treasuries that rely on non-custodial USDT holdings. Cointelegraph and on-chain data trackers highlighted multi-billion-dollar monthly swings in USDT supply during recent months.

In a broader regulatory context, the uptick in freezes reflects intensified cooperation between stablecoin issuers and law enforcement amid tougher AML expectations from bodies such as the FATF and national authorities. Legislative changes in 2025 accelerated compliance activity and likely contributed to enforcement clustering in mid-2025. The architecture of Tether’s smart contracts — which allow issuer-level blacklisting — makes such interventions technically straightforward once legal requests are validated.

Looking ahead, market participants and compliance teams should expect continued targeted freezes and a heavier reliance on KYT (Know Your Transaction) tooling and on-chain screening to avoid exposure. For traders and institutions, the key mitigant is process: tighter pre-trade screening, custody segmentation, and swift coordination with analytics providers can reduce the operational and legal risks posed by issuer-level freezes.