A report from US Senator Richard Blumenthal has reignited scrutiny of Tether's exposure to Iran, prompting the stablecoin issuer to publish freeze statistics that have in turn drawn criticism from within the crypto community over USDT's centralised, permissioned design.
Blumenthal, a member of the Senate Permanent Subcommittee on Investigations, published the report in early October 2026. It describes USDT as a financial lifeline embedded within Iran's banking network. "My new PSI report reveals how Tether and its flagship token have become pillars of Iran's shadow banking system," Blumenthal said. A Democratic analysis underpinning the report examined 846 cryptocurrency wallets subject to sanctions or seizures linked to Iran's government.
Tether CEO Paolo Ardoino responded on October 19, arguing the company's record shows the opposite of what the report implies. According to Tether, since 2023 it has frozen wallets an average of four weeks before official designations by the US Office of Foreign Assets Control and Israel's National Bureau for Counter Terror Financing. The company said it froze the addresses cited in the report before Chainalysis had labelled them in 99% of cases.
"Tether froze the reported addresses before Chainalysis labeled them," the company said, adding that its actions led to a "94% decrease in Iran-linked stablecoin volumes." Tether also pointed to a separate freeze announced on September 28, 2026, involving 550 million USDT held in addresses that US authorities had linked to Iran's Central Bank and to schemes used for sanctions evasion. "The reality shows that Tether acts quickly against new threats thanks to its partnerships with law enforcement," the company said.
A compliance record, or a liability?
For European holders of USDT, and for regulators monitoring stablecoin oversight on the continent, the episode underscores the extent to which Tether's ability to freeze funds at will — a feature it presents as a security measure — sits at the centre of debates over the token's trustworthiness.
Reaction within the crypto community has been mixed. Yuri Yerofeyev, founder of Tetrapolar, questioned the framing of Tether's response. "I'm not sure that's a good boast, but I understand that with the size of your company you had to choose a political loyalty," he said.
Bitcoiner Mihai Daniel Marius offered a more measured view, acknowledging the strength of Tether's case while flagging its implications. "It's a solid compliance argument," he said, adding: "It's also the clearest reminder that USDT is a 'permissioned' asset, and people should hold it knowing that."
A commentator identified only as Mario drew a sharper contrast, calling the episode "the best argument in favor of Bitcoin."
The exchange leaves Tether in the position of defending its compliance credentials to US lawmakers while simultaneously facing questions from its own user base about what that compliance reveals about the asset's control structure — a tension likely to feature in any future European review of stablecoin issuers' freeze powers.
