Blumenthal PSI report: USDT central to Iran shadow banking as Tether cites $550M freezes
By Crypto Wire
September 28, 2026
Desk of the Day — Plain English Policy
Senate Democrats just put Tether’s dollar stablecoin in the middle of a sanctions fight collectors already feel at the bid table. On September 28, 2026, Sen. Richard Blumenthal, ranking member of the Senate Permanent Subcommittee on Investigations, released a PSI report arguing that USDT has become a “significant financial lifeline” inside what investigators call Iran’s cryptocurrency-based shadow banking network. The same-day company reply is on Tether’s site: roughly $550 million in Iran-linked USDT freezes in 2026 alone, timed to U.S. Treasury’s broader digital-asset sanctions push. Secondary wraps from The Block (~3:10 p.m. EDT / 19:10 UTC) and CoinDesk track the same release—this desk sticks to the Senate and issuer primaries.
What PSI says it measured. Democratic investigators say they ran a forensic pass over blockchain data from 846 unique wallets that have been sanctioned or targeted for seizure over ties to Iran and its regional proxies. Of those wallets, 84% “have transacted exclusively, or nearly exclusively, in USDT,” the press release states—activity the report ties to moving funds into and out of Iran and supporting the rial under U.S. sanctions, including through the Central Bank of Iran. PSI also argues USDT sits as a shared rail linking Iran and proxy organizations, and that weak proactive freezes before 2024—and still uneven blocking of wallets with public illicit markers—helped create a permissive environment. Treat those as subcommittee findings, not adjudicated court facts.
What Blumenthal wants next. Alongside the report, he sent letters to Treasury Secretary Scott Bessent and Attorney General Todd Blanche asking both departments to investigate Tether’s anti-money-laundering and sanctions practices, including possible Bank Secrecy Act and International Emergency Economic Powers Act issues. The Bessent letter, summarized in the press release, also criticizes recent crypto enforcement as dropped, lightly settled, or reversed, and flags Tether’s U.S. political and custody ties—including Cantor Fitzgerald’s reported 5% stake and U.S. asset custody—as raising oversight questions. Those are Blumenthal’s allegations; neither letter is a finding of liability.
Tether’s same-day counter. The issuer’s September 28 post says 2026 Iran-linked freezes total about $550 million, including more than $344 million across two addresses in April after OFAC/U.S. law-enforcement information—followed the next day by OFAC listing those addresses as Central Bank of Iran digital-currency identifiers—and more than $130 million across four TRON wallets in July when Treasury expanded that designation. CEO Paolo Ardoino said USDT “is not a haven for sanctioned actors,” stressing that Tether freezes when authorities provide credible information and that public chains give investigators visibility cash does not. The company also cites broader tallies—work with 340+ agencies in 67 countries and more than $4.9 billion frozen overall—as context, not a rebuttal line-by-line of PSI’s 846-wallet sample.
Why this unused LN over watchlist calendars. Bitget’s ETH withdrawal reopen remains a September 29 08:00 UTC calendar item after Chen’s test-transfer chapter (9980)—no primary confirming an early ETH reopen on this tick. Alpenglow’s mainnet genesis cert is still null after 9912. BitMine’s Alchemy thread (9986 / 9984) has no newer weekly treasury print since the six-million ETH chapter. MiCA’s ECB staking consultation still points to a September 30 close (9828). The clean unused wire is today’s PSI USDT/Iran report plus Tether’s freeze reply—policy and settlement rails for NFT desks that clear bids in dollar stables.
What changes for bids: Marketplace bids priced in USDT sit on the same issuer freezes and OFAC identifier list that Treasury and DOJ are now being asked to stress-test. Collectors should watch whether Bessent or Blanche open a formal probe, whether OFAC adds more Central Bank of Iran digital-currency identifiers, and whether Tether posts another large Iran-linked freeze print—any of those can tighten which USDT venues and rails stay usable for NFT settlement without inventing a new trading ban today.
Bottom line: Blumenthal’s PSI report says 84% of 846 Iran-linked sanctioned wallets transacted almost entirely in USDT and asks Treasury and DOJ to investigate—while Tether answers that it has frozen about $550 million in Iran-linked USDT in 2026—unused Plain English Policy tape for Sep 28 OC.
Disclaimer: This article is provided for informational and educational purposes only. It does not constitute financial, investment, legal, or trading advice. The NFT market is highly volatile, and past performance is not indicative of future results. Readers should conduct their own research and consult qualified professionals before making any decisions related to digital assets. The cover image for this article may have been created using artificial intelligence (AI).
