Tether has supported approximately $550 million in USDT freezes tied to Iranian sanctions networks during 2026 alone, the company said on September 28, as the US Treasury expands its campaign against Tehran's financial infrastructure. The disclosure comes weeks after Treasury Secretary Scott Bessent announced Operation Economic Outcast, a new push to sever the financial networks supporting the Iranian regime and the Islamic Revolutionary Guard Corps, with Treasury specifically naming digital assets as one of five sectors facing expanded sanctions scrutiny.
"Tether has consistently demonstrated that USD₮ is not a haven for sanctioned actors, terrorist organizations or criminal networks," said Paolo Ardoino, Tether's CEO. "Public blockchains provide authorities with a level of visibility into the movement of funds that simply does not exist with cash, and Tether can act when credible information is provided by law enforcement."
Tether Has Supported Nearly $550 Million in Iran-Linked USD₮ Freezes as U.S. Expands Sanctions Campaign
— Tether (@tether) September 28, 2026
Read more:https://t.co/L15BcxEjo7
How the $550 million broke down across two separate actions
The bulk of this year's Iran-linked freezes came in two waves. In April 2026, Tether froze more than $344 million in USDT across two addresses, acting on information from OFAC and US law enforcement. The following day, OFAC formally designated those same addresses as digital currency identifiers for the Central Bank of Iran, whose sanctions listing is tied to the IRGC-Qods Force and Hezbollah. In July, Treasury expanded that same Central Bank of Iran designation to four additional Tron addresses, and Tether froze more than $130 million across those wallets.
The sequencing here, Tether freezing funds before OFAC's formal designation became public in the April case, reflects how sanctions enforcement against crypto assets typically works in practice. OFAC and law enforcement can share intelligence with a compliant issuer ahead of a public designation to prevent funds from moving once an entity becomes aware it is under investigation. Tether's willingness to act on that pre-designation intelligence, rather than waiting for the formal SDN listing, is itself the operational capability Treasury has come to rely on for this specific sanctions category.
Tether's counter-terrorism financing record predates the current Iran campaign
Tether's cooperation with Israel's National Bureau for Counter Terror Financing goes back several years. In 2023, the company disclosed freezing 32 addresses containing $873,118.34 tied to illicit activity affecting Israel and Ukraine. Tether has since frozen more than 22 million USDT across over 40 separate cases referred by the NBCTF, spanning more than 640 addresses.
That relationship extended directly into the current IRGC enforcement effort. In September 2025, the NBCTF published a list of 187 cryptocurrency addresses it identified as associated with the IRGC. Blockchain analytics firm Elliptic later reported that Tether had blacklisted 39 of those addresses, freezing approximately $1.5 million in USDT that remained in the wallets.
Why the scale of Tether's total freeze record matters
Beyond Iran-specific actions, Tether says it works with more than 340 law enforcement agencies across 67 countries, supporting more than 2,800 investigations globally, including more than 1,500 involving US law enforcement. Those efforts have resulted in more than $4.9 billion in total assets frozen, with more than $2.4 billion of that tied to US authorities specifically.
A freeze total this size, spread across thousands of individual cases rather than concentrated in a handful of large actions, points to a compliance operation built around routine law enforcement referrals rather than occasional high-profile interventions. That distinction matters for how regulators evaluate stablecoin issuers going forward, since a pattern of consistent, smaller-scale cooperation is generally viewed as more indicative of an operational compliance program than isolated large freezes that could reflect reactive pressure rather than built-in process.
Tether listed several specific cases where US agencies publicly credited the company's assistance. In September 2026, a coordinated DOJ strike force action against a scam center marketplace restrained more than $52 million in a single day, with the DOJ thanking Tether "for its proactive assistance in this investigation." Separately, the US Secret Service described a $225.3 million case involving Tether's cooperation as the largest cryptocurrency seizure in its history.
The Garantex case and what it signals about sanctioned exchange enforcement
Among the cited cases, Tether's assistance in disrupting Garantex, the sanctioned Russian exchange, stands out. The DOJ, FBI, and US Secret Service worked with Tether to freeze approximately $23 million in illicit funds connected to the platform, and the DOJ publicly thanked Tether for its role in the international disruption.
Garantex had operated for years as a primary on- and off-ramp for ransomware payments and other illicit crypto flows tied to Russian-linked cybercrime, and its 2022 OFAC sanctioning did not immediately stop its operations, since the exchange continued processing transactions through workarounds. Tether's participation in eventually freezing funds tied to the platform illustrates how stablecoin issuer cooperation has become a more direct enforcement lever against sanctioned exchanges than sanctions designations alone, which sanctioned entities can sometimes route around until an asset issuer specifically blocks the wallets holding their funds.
Tether also disclosed a 2025 action freezing and reissuing approximately $1.6 million in USDT tied to Buy Cash Money and Money Transfer Company, a Gaza-based financial network named in a DOJ civil forfeiture action involving terrorist financing. The company said it has aligned its wallet-freezing policy directly with the OFAC Specially Designated Nationals List, extending sanctions controls to secondary-market wallets that appear on that list.
"Financial crime does not become invisible simply because it touches a blockchain. In many cases, the opposite is true," Ardoino said. "The record is public: the DOJ, FBI, Secret Service, HSI, OFAC and authorities around the world have repeatedly worked with Tether to trace, freeze and recover assets. We will continue to make that capability available to authorities working to stop terrorism, sanctions evasion, fraud and other serious crimes."
Tanya Petrusenko
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