Tether says Iran-linked volume fell 94% and it froze a month early

Paolo Ardoino says Iran-linked crypto volume has fallen 94%, and that Tether has been ahead of the sanctions lists since 2023. The company puts its average lead at four weeks before an address appears on an OFAC or NBCTF list, and says that in 99% of those cases the freeze landed before Chainalysis flagged the address in its own reports.

“Since 2023 we have frozen the relevant addresses an average of four weeks before the official listings.”

— Paolo Ardoino, CEO, Tether

What the Senate counted

The statement answers a specific accusation. On 28 September the Senate Permanent Subcommittee on Investigations published a report counting 846 wallets sanctioned or targeted for seizure over links to Iran and its regional proxies, and found that 84% of them used USDT exclusively or almost exclusively. That is 711 wallets out of 846, which is the number the four-week claim is aimed at.

How big $550m is

Tether says it has frozen about $550m of USDT tied to Iran since the start of 2026. Set against the $4.9bn the company has frozen across its whole history, which we counted in September, the Iran tranche is 11% of everything it has ever locked. Set against the token itself, $550m is 0.3% of the $183bn in circulation and about seventeen minutes of USDT trading at the current $46.6bn a day.

Both framings are true and they point in opposite directions. Eleven percent of a lifetime of freezes going to one country in ten months is a large share of the company's enforcement work. Seventeen minutes of turnover is what the same sum looks like from inside the market the token serves.

What cannot be checked

The 94% is the part that cannot be checked. Tether has not published the data behind it, has not said what period the fall covers, what baseline it is measured against, or whether it counts USDT alone or every stablecoin an Iranian counterparty might touch. A figure that moves a Senate argument should carry its own arithmetic.

The four-week lead is more testable and more interesting. If a private issuer routinely freezes a month before a government lists, the list has stopped being the trigger and started being the confirmation. That is the same shift the US rule on crypto addresses rather than bank accounts made explicit this month, and it moves a judgement that used to belong to Treasury onto a company's compliance desk.

Two things settle this. Whether Tether publishes the series behind the 94%, with dates and a baseline. And whether the subcommittee, which has already asked Treasury and Justice to open files, treats the four-week lead as a defence or as evidence that the company could see what it chose not to act on earlier.

Informational material, not investment advice. Figures come from Tether's own statement and the subcommittee report, and the underlying data behind the 94% has not been published.