A newly released Senate report has intensified scrutiny of Tether's stablecoin USDT, alleging it serves as Iran's primary cryptocurrency payment rail. The timing of the report's public release coincided with Tether's announcement that it had frozen nearly $550 million in Iran-linked USDT.
The Permanent Subcommittee on Investigations released the 24-page study titled Tethered to Terror: Crypto & Iran's Shadow Banking Network, promoted by Senator Richard Blumenthal of Connecticut. The analysis examined 846 distinct cryptocurrency addresses sanctioned by the U.S. or Israel and linked to Iran or Iran-backed groups.
Report's Key Findings
According to the subcommittee, USDT occupies a central position in networks connecting Iranian oil proceeds to settlements for Hezbollah, the Houthis, and Hamas. Some wallets analyzed reportedly have ties to the Central Bank of Iran. The report contends that Tether's response time to freezing sanctioned assets creates what the subcommittee describes as a permissive environment for illicit activity.
The study also notes that while Iran-based groups leverage bitcoin, ether, TRX, and other digital assets, USDC from competitor Circle played an extremely limited role in the subcommittee's findings.
Tether's Response
Tether rejected the report's premise in a company statement. CEO Paolo Ardoino asserted that USDT is not a haven for sanctioned actors, terrorist organizations or criminal networks.
The company highlighted cooperation with law enforcement and Israel's National Bureau for Counter Terror Financing, stating that these actions resulted in approximately $550 million in Iran-linked USDT freezes during 2026 alone. Tether framed its efforts as evidence of commitment to combating illicit finance globally.
