Stablecoin issuer Tether announced that it assisted US law enforcement and the Department of the Treasury’s Office of Foreign Assets Control (OFAC) in freezing nearly $550 million in Tether (USDT) tied to Iranian sanctioned entities throughout 2026. The disclosures highlight the issuer’s active compliance posture as federal regulators expand enforcement across digital asset sectors.
Key Actions Target Central Bank of Iran and Affiliated Networks
The majority of the asset freezes occurred across two major enforcement actions targeting addresses linked to the Central Bank of Iran, the Islamic Revolutionary Guard Corps-Qods Force (IRGC-QF), and Hezbollah. During the April enforcement action, Tether froze over $344 million in USDT across two addresses following intelligence shared by US authorities, preceding OFAC’s formal designation of the wallets as digital currency identifiers.
Later in July, US authorities sanctioned four additional TRON network addresses holding approximately $130 million in USDT, prompting immediate secondary market restrictions by the issuer. In total, Tether estimates cumulative 2026 enforcement actions involving Iran-linked digital asset infrastructure at approximately $550 million.
The restrictions apply directly to the USDT tokens held at the specified on-chain addresses, preventing token transfers without altering the operation of the underlying TRON blockchain.
Federal Expansion of Sanctions Covers Digital Asset Sector
Tether Chief Executive Officer Paolo Ardoino reiterated that public blockchain transparency enables law enforcement to trace illicit flows, emphasizing that USDT is not intended as a venue for sanctioned actors. Tether aligns its address-blacklisting protocols with OFAC’s Specially Designated Nationals (SDN) list to restrict secondary market movement for flagged assets.
The actions coincide with the Treasury Department’s Operation Economic Outcast, launched in August 2026, which formally incorporated digital assets into expanded sectoral sanctions against Iran alongside gold, technology, aviation, and shipping. Recent enforcement actions under the campaign include the designation of Iranian digital asset venue BitBank and affiliated software entities allegedly facilitating capital movements for sanctioned networks. Tether reported that its global law enforcement cooperation has assisted more than 340 agencies across 67 countries, contributing to over $4.9 billion in total asset freezes globally, including more than $2.4 billion in coordination with US authorities.
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