Invest2 publishers3 min readPublished
Senate staff say $34.6 million left Hezbollah-linked wallets while Tether took nine months to freeze them
Senate staff say Tether froze 5 of 39 Hezbollah-linked wallets Israel named in 2023 while $34.6 million left the rest. Treasury and the Justice Department can act on that freeze record more readily than on the report's 84% USDT share when they answer Blumenthal by Oct. 9.
The Investor · Invest desk

What happened
- Senate staff found 84% of 846 Iran-linked wallets ran almost entirely on USDT, with shares of 87% on Israel's list and 57% on OFAC's.
- Blumenthal asked Treasury and the Justice Department to investigate Tether and to say by Oct. 9 whether any earlier inquiry was narrowed, paused or closed.
- Tether said freezes it supported this year locked up about $550 million of Iran-linked USDT, in a release that did not mention the report.
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Why it matters
- decision The Oct. 9 deadline makes Treasury and the Justice Department state on record what happened to reported earlier Tether inquiries, including a Manhattan probe said to date from October 2024.
- contradiction The 84% share leans on Israel's list; on the 101 wallets OFAC itself named it is 57%, so a US case would more likely rest on Tether's freeze timing than on the share.
- precedent Faulting Tether for leaving unnamed Central Bank of Iran wallets open would turn an issuer's freeze power into a duty to monitor, beyond answering sanctions notices.
The 84% figure rests on a counting rule [2]. A wallet counts when more than 80% of its dollar volume moved in USDT. On that basis the share was 87% for the 757 wallets on Israel's list and 57% for the 101 on OFAC's [3]. The two lists add to 858 against a stated total of 846, so about a dozen wallets appear on both [1]. Israel's counter-terror financing bureau supplied roughly 89% of the sample [4]. Bitcoin came a distant second on each list [4], and the staff call their findings preliminary [5].
Cryptopolitan argues that global crypto firms fear sanctions and compliance trouble more than a short-term market crash [24]. The referral can go a few ways from here. Treasury and the Justice Department can leave a letter from the subcommittee's ranking member [1] unanswered. They can reply by Oct. 9 that earlier inquiries remain open [6]. Or the Al-Law record can become the core of the sanctions and Bank Secrecy Act case Blumenthal referred [23]. I think the freeze record carries the enforcement risk. A high USDT share tells you which token Iran picked. Freeze timing tells you what Tether did. The counter-case is Tether's own: an issuer that says it helped lock about $550 million of Iran-linked USDT this year [14] and works with more than 340 agencies in 67 countries [19] has a compliance operation to point to.
Tether can blacklist a USDT wallet so its funds cannot move [25]. That power is why the timing matters. According to the report, Tether did not appear to freeze any wallet Israel designated from 2021 to May 2023, and its freezing since has been "uneven and inconsistent" [9]. In June 2023 Israel named 39 wallets tied to Tawfiq Muhammad Sa'id Al-Law, whom the report calls a Hezbollah money launderer, and Tether froze five of them, about 13% [10][2]. The other 34 stayed open until March 2024, roughly nine months, shortly before OFAC sanctioned Al-Law [10][2]. More than $34.6 million in USDT left them in that gap [11]. The staff also fault Tether for not acting on its own against wallets no notice named, including Central Bank of Iran wallets that Babak Zanjani posted on X in December 2025 [12].
Tether answered with totals. Its release said that, beyond the $550 million, it has frozen more than 22 million USDT across more than 640 addresses in cases Israel's bureau referred [15], or roughly $34,000 an address [3]. Chief executive Paolo Ardoino said the token "is not a haven for sanctioned actors, terrorist organizations or criminal networks" [17]. The release did not mention the report [16]. According to the staff, Tether confirmed receiving the subcommittee's June document request and has not responded [13].
The letters also press the departments. They cite reports that Manhattan federal prosecutors opened a Tether investigation in October 2024 and that Treasury weighed sanctioning the company [7]. They note that Cantor Fitzgerald owns 5% of Tether and "until recently was run by Commerce Secretary Howard Lutnick" before his children took control [8]. "Tether and its flagship token have become central to Iran's shadow banking system," Blumenthal said [18].
For USDT holders, the exposure in these sources runs through counterparties. On Aug. 24 Treasury named digital assets one of five sanctionable sectors under Operation Economic Outcast [20]. TRM Labs says that raises the chance of secondary sanctions on exchanges, OTC brokers and payment providers that support Iran's crypto trade [21]. On Sept. 14 prosecutors filed to seize about $61 million tied to Iranian black-market oil, from a group of wallets that processed about $1.5 billion [22]. Neither source addresses USDT's reserves or redemptions. The thesis fails if the Oct. 9 answers say the earlier inquiries were closed and nothing follows. The $34.6 million gap would then be a Senate finding with no enforcement behind it [11][6].
What to watch
- Whether Treasury and the Justice Department answer Blumenthal by Oct. 9, and whether either says an earlier Tether inquiry was narrowed, paused or closed.
- Whether OFAC uses the digital-assets sector designation to name exchanges, OTC brokers or payment firms, the secondary-sanctions path TRM Labs describes.
- Whether Tether produces the documents the subcommittee requested in June or addresses the Al-Law freeze timing directly.