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Senate investigation into Tether use by Iranian regime – tracking report and sanctions

The U.S. Treasury Department designated VTB Bank Public Joint Stock Company on September 14, 2026, for helping Iran evade international sanctions. The Senate Banking Committee publishing its final report on the Tether investigation would clarify the status of the inquiry into digital asset use by the Iranian regime.

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The story so far

written Sep 29

What is happening

The U.S. Treasury Department is targeting financial institutions that facilitate Iranian sanctions evasion to restrict the regime's access to global capital [2]. Secretary of the Treasury Scott Bessent stated on September 14, 2026, that the government will continue to isolate enablers of the Iranian regime [2].

OFAC designated VTB Bank Public Joint Stock Company on September 14, 2026, under Operation Economic Outcast [2]. The Treasury Department cited the Russian bank's involvement in helping Iran evade international sanctions [2]. This designation follows the publication of new regulations and guidance on September 24, 2026, and updates to the sanctions list on September 23, 2026 [1].

What to watch

The Senate Banking Committee publishes its final report on the Tether investigation. The U.S. Treasury Department issues a formal sanctions order targeting entities involved with Tether and Iran. The Office of Foreign Assets Control (OFAC) releases official guidance or a compliance FAQ on the new sanctions. A court rules on any legal challenge to the sanctions or the investigation’s findings.

Senator Elizabeth Warren issued a statement regarding export controls on September 25, 2026 [12]. Further legislative oversight actions by the Senate Banking Committee would clarify the status of the investigation into digital asset use by the Iranian regime.

Read the full brief · how we got here

How we got here

OFAC issued general licenses on September 28, 2026, following a series of regulatory updates earlier in the month [1]. These actions are part of a broader enforcement strategy that includes recent counter-narcotics and counter-terrorism designations [7].

In the federal court system, Judge Beryl A. Howell of the U.S. District Court for the District of Columbia upheld OFAC's authority to deny delisting petitions in a ruling on July 24, 2026 [5]. The court granted summary judgment to the government, maintaining the designation of a former Guatemalan official [5].

References · 5
  1. [1]ofac.treasury.gov — Recent Actions - Office of Foreign Assets Control
  2. [2]home.treasury.gov — Operation Economic Outcast Sanctions Major Bank Helping Iran Evade ...
  3. [5]ferrariassociatespc.com — Martinez Morales v. Treasury: Federal Court Upholds OFAC's Denial of a ...
  4. [7]ofac.treasury.gov — Counter Narcotics and Counter Terrorism Designations and Designation ...
  5. [12]banking.senate.gov — United States Committee on Banking, Housing, and Urban Affairs

What would close this

0 of 4 met
The Senate Banking Committee publishes its final report on the Tether investigation.open
The U.S. Treasury Department issues a formal sanctions order targeting entities involved with Tether and Iran.open
The Office of Foreign Assets Control (OFAC) releases official guidance or a compliance FAQ on the new sanctions.open
A court rules on any legal challenge to the sanctions or the investigation’s findings.open
If none of these happen, this page closes automatically on .

Timeline

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When we started following: The Office of Foreign Assets Control issued new general licenses on September 28, 2026 [1].

The U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) issued general licenses on September 28, 2026 [1]. This action followed the publication of regulations and guidance on September 24, 2026, and sanctions list updates on September 23, 2026 [1].

OFAC designated Russian financial institution VTB Bank Public Joint Stock Company on September 14, 2026 [2]. The Treasury Department applied the designation under Operation Economic Outcast, citing the bank's involvement in Iranian sanctions evasion [2]. Secretary of the Treasury Scott Bessent stated that the government will continue to isolate enablers of the Iranian regime [2].

In legislative oversight, Senator Elizabeth Warren issued a statement on September 25, 2026, regarding export controls [12].

In federal court, Judge Beryl A. Howell of the U.S. District Court for the District of Columbia granted summary judgment to the government on July 24, 2026 [5]. The ruling upheld the decision by OFAC to deny a delisting petition filed by a former Guatemalan official [5].