The disclosure came as Senate Democratic investigators alleged USDT had become a key part of Iran’s shadow banking network. Stablecoin issuer Tether said it helped authorities freeze nearly $550 million in Iran-linked USDT during 2026, as a Senate Democrat called for an investigation into the stablecoin issuer on Monday. In a statement on Monday, the company said it has been working closely with international law enforcement for years. This year alone, it froze more than $130 million in USDT across four wallets, and in April, it froze more than $344 million linked to the Central Bank of Iran. “Tether has consistently demonstrated that USDT is not a haven for sanctioned actors, terrorist organizations or criminal networks,” said Tether CEO Paolo Ardoino. Read more