U.S. Senate Report: Tether Stablecoin Identified as Key Tool for Iran to Evade Sanctions
nashnova research
A U.S. Senate investigation found that Tether's stablecoin USDT has become Iran's primary payment channel for evading sanctions and funding proxy militias — putting the world's largest stablecoin under direct pressure from American lawmakers.
What did the report actually find?
The Senate Permanent Subcommittee on Investigations analyzed 846 crypto wallets sanctioned by the U.S. and Israel on Iran-related grounds. 84% transacted entirely or almost entirely in USDT.
This means → USDT is not an occasional workaround. It is the default payment rail for Iran's sanctions-evasion system.
The report was led by Senator Richard Blumenthal (D-Conn.) and disclosed via a copy obtained by *The Wall Street Journal*.
Where did the money go?
Blumenthal said Tether and USDT have become "the backbone of Iran's shadow banking system," funding Hezbollah and other proxy militias, as well as drone and missile programs.
The report details a key case: leaked documents show an Iranian company purchased tens of millions of dollars in USDT on behalf of Iran's central bank.
Blockchain analysis further linked some of those USDT holdings to the $1.5 billion stolen by North Korean hackers from crypto exchange Bybit. In plain terms = Iran bought stolen crypto to prop up the rial and keep oil exports to China flowing.
Why hasn't Tether frozen these wallets?
Tether has the technical ability to freeze and "re-mint" USDT — re-minting means destroying tokens in one wallet and re-issuing them in another — but investigators concluded it acted too slowly.
A Tether spokesperson did not respond to requests for comment. The company has previously cooperated with law enforcement to freeze some Iran-linked wallets.
This reflects a core tension: Tether publicly claims compliance, yet the Senate report says its freeze response is far too slow.
Is Iran's USDT usage trending down?
USDT accounts for roughly 60% of total global stablecoin market cap. TRM Labs data shows Iranian-linked wallets' USDT share fell from 72% in 2024 to 67% in 2025, then dropped further to 14% by August this year.
Yet investigators noted that in the most recent U.S. sanctions designations, USDT remained a common medium in flagged wallets — including Iran central-bank-linked wallets sanctioned in July.
In plain terms = the overall share is declining, but among the most sensitive sanctions targets, USDT is still the dominant coin.
What happens next?
The subcommittee has formally referred the report to the U.S. Department of Justice and Treasury Department.
This means → pressure on Tether shifts from the congressional-investigation phase into a potential enforcement phase. Whether DOJ and Treasury follow up will determine if this report is a warning shot or a prelude to prosecution.
For the stablecoin market, USDT's 60% market-cap share means any material enforcement action against Tether could trigger a chain reaction across the entire stablecoin ecosystem.
市场有风险，内容仅供研究参考，不构成投资建议。