Senate report says Tether played a critical role in Iran-linked transactions

Tether and its dollar-pegged crypto asset USDT were identified in a new report by Democratic members of the U.S. Senate as one of the key tools Iran used to evade international sanctions. The text, released on Monday by the Permanent Subcommittee on Investigations under the Senate Homeland Security and Governmental Affairs Committee, argued that USDT had a central function in Iran’s crypto-based shadow banking network.

The report said Iran-linked financial flows reached significant volumes and claimed that wallet blocking and freezing procedures for USDT were insufficient. According to the text, some wallets were frozen only weeks later, while in other cases the company responded to requests but did not blacklist the relevant addresses.

What allegations stood out in the report?

According to the Senate Democrats’ assessment, Tether became a frequently used channel, especially in transactions aimed at bypassing Iran’s sanctions. In a brief statement, the report said,

“USDT has become an important financial lifeline in Iran’s shadow banking network,” according to the report.

  • Before 2024, the report claimed that wallets flagged by counterterrorism authorities were not frozen comprehensively or consistently.
  • It also argued that the company failed to proactively block some wallets allegedly used for clearly illegal activity.

The report also suggested that this lack of deterrence increased abuse. It said groups such as Hamas had increasingly shifted toward using USDT rather than a mix of Bitcoin and other crypto assets over time.

What is the key takeaway for the crypto market?

The report showed that dollar-pegged stablecoins are under scrutiny not only as payment and transfer tools, but also in terms of sanctions enforcement and compliance. The focus of that debate is how quickly stablecoin issuers freeze wallets, apply blacklists and move in response to sanctions risk.

This assessment from the U.S. Senate has brought renewed attention to the regulatory scrutiny of stablecoins, which rank among the highest-volume assets in the crypto market. The report did not include Tether’s response to the allegations.