Tether Freezes $344M USDT Linked to Iran Central Bank

What Tether Froze

The Tether Iran freeze involved two Tron wallets held a combined $344 million in USDT. According to on-chain data, one wallet contained roughly $213 million. The other held about $131 million.

Tether blacklisted both addresses at the smart-contract level on April 23. As a result, the blacklist function now prevents all transfers to and from those wallets. The funds remain permanently locked unless Tether reverses the action. “USD₮ is not a safe haven for illicit activity,” Tether CEO Paolo Ardoino said on April 23. He added that Tether acts “immediately and decisively” against sanctioned entities.

How Iran Allegedly Used USDT to Evade Sanctions

According to Arkham’s analysis, Iran’s Central Bank used Tron-based USDT to move capital under sanctions. Specifically, the CBI allegedly relied on the stablecoin to stabilize the rial and settle international trade.

In addition, transaction trails link the frozen wallets to Iranian exchanges like Nobitex and the now-sanctioned Garantex. Nearly all funds moved through Tron rather than Ethereum. That preference stems from Tron’s lower fees and faster settlement times.

Meanwhile, blockchain analytics firm Elliptic reported in January 2026 that CBI accumulated at least $507 million in USDT. As a result, the $344 million freeze covers a significant share of that total. Still, additional active wallets may exist beyond what analysts have identified so far.

Arkham Deanonymizes Iran’s Crypto Wallets

Arkham Intelligence published its findings on May 11. The firm then announced them publicly on X on May 13. Its research team used on-chain clustering and shared counterparty data to attribute the wallets to CBI.

“Arkham Intel has deanonymized the Central Bank of Iran’s crypto wallets,” the firm said on X. The Arkham entity page for CBI now shows the full history of inflows, outflows, and counterparties.

Specifically, Arkham used the OFAC and Tether freeze as a seed label. From there, the team mapped the broader network of intermediary addresses. This approach builds on Arkham’s track record with nation-state crypto activity.

OFAC and the Broader Sanctions Push

The Tether freeze fits into the Trump administration’s maximum-pressure campaign on Iran. Multiple outlets have reported the effort under the name “Operation Economic Fury.” According to CNN, a U.S. official confirmed “material links to the Iranian regime.”

For context, Iran has escalated its use of crypto for sanctions evasion since 2019. That year, OFAC first designated CBI. In March and April 2026, tensions rose further. Iran demanded Bitcoin tolls for Strait of Hormuz shipping, and heavy outflows from Nobitex followed U.S. airstrikes.

Tether’s Enforcement Track Record

This action is part of a broader pattern. Tether has frozen more than $3.3 billion in USDT across 7,268 addresses, according to company disclosures. The firm coordinates regularly with law enforcement worldwide.

Ardoino emphasized that Tether combines blockchain transparency with real-time monitoring. He also stressed direct coordination with law enforcement “to stop funds before they can move.” In other words, the company positions itself as a compliance partner.

Notably, no material disruption to the USDT peg or market cap occurred after the freeze. Stablecoin flows on Tron and Ethereum continued normally outside the two frozen addresses.

The Censorship Resistance Debate

The freeze also reignited debate about centralized stablecoins. On X, some commentators called Tether “the new OFAC.” They argued a private company should not freeze sovereign funds at will.

At the same time, privacy advocates raised concerns about Arkham’s deanonymization capabilities. If a blockchain analytics firm can unmask a nation-state’s wallets, critics argue, then individual users face even greater exposure.

On the other side, institutional observers see the freeze as a sign of maturing infrastructure. Compliance tools now operate at the same speed as the networks they monitor. For regulators, that represents progress. For cypherpunks, it represents a departure from crypto’s founding principles.

What Remains Unknown

Several questions remain unanswered. It is still unclear whether OFAC directed the freeze preemptively or responded to intelligence after the fact. Similarly, the full scope of CBI’s on-chain activity beyond the labeled wallets remains uncertain.

Iran has not issued an official response as of May 13, 2026. No public statement from Iranian officials or CBI has surfaced about the freeze or the deanonymization. The Tether Iran freeze now stands as one of the largest publicly reported sanctions-linked USDT freezes.