Overview
- The Senate Democratic staff report released Sept. 28, 2026 analyzed 846 wallets linked to Iran and found about 84% transacted predominantly in Tether’s USDT, which investigators say makes the token a core payments rail for Tehran’s informal finance.
- Investigators traced large USDT flows into Iran‑linked networks, reporting at least $507 million tied to the Central Bank of Iran and roughly $603 million moved by two sanctioned oil smugglers between 2021 and 2025, while U.S. prosecutors filed a separate civil forfeiture on Sept. 14 seeking about $61.2 million.
- Tether says it has worked with authorities and supported freezes of roughly $550 million in Iran‑linked USDT in 2026, citing specific April and July freezes that targeted addresses later added to OFAC listings.
- The report faults Tether’s inconsistent use of its issuer controls, saying delays in blacklisting let funds move after public notices and calculating more than $34.6 million left flagged wallets before they were frozen, which raises questions about the company’s procedures and timing.
- The referral to Treasury and DOJ, combined with Operation Economic Outcast and recent OFAC actions against Iranian exchanges, signals possible federal probes or enforcement steps that could reshape how stablecoin issuers, exchanges, and counterparties are regulated and monitored.