USDT

The U.S. Treasury’s OFAC sanctioned IRGC-linked crypto wallets in April 2026, triggering a $344 million USDT freeze by Tether in under 24 hours — the largest single crypto sanctions action in history. Using blockchain analytics from TRM Labs and Chainalysis, investigators traced over 1,000 transactions across four years to Iran’s Central Bank. This is how stablecoin issuers became America’s sharpest financial enforcement tool.