Key Takeaways:
The US Treasury Department has frozen approximately $344.2 million in Tether (USDT) stablecoins after sanctioning two cryptocurrency wallets linked directly to Iran’s Central Bank. The action, taken on April 24, 2026, represents a significant escalation in the use of sanctions against state-level digital currency holdings and is the largest seizure of Iranian state-linked crypto to date.
"Tether worked closely with OFAC and U.S. law enforcement to lock the funds," TRM Labs, a blockchain intelligence firm, said in a report on the action. The sanctioned wallets were also connected to the Islamic Revolutionary Guard Corps-Qods Force (IRGC-QF) and its proxy, Hezbollah, according to the Treasury’s Office of Foreign Assets Control (OFAC).
Blockchain data reviewed by TRM Labs shows the two addresses had accumulated nearly $370 million through almost 1,000 separate deposits since March 2021. Outflows totaled only about $25 million, or under 7 percent of total inflows, with the largest external transfers moving to another address within the same network rather than to a recognized exchange. This pattern suggests the wallets were used as long-term reserve vaults, not for daily operations.
The move signifies a strategic shift in US sanctions policy, moving beyond crypto exchanges and intermediaries to target sovereign reserve assets directly on the blockchain. For financial institutions, the action necessitates an urgent review of counterparty exposure to ensure no direct or indirect contact with the sanctioned addresses.
This is the first instance of OFAC sanctioning cryptocurrency wallets belonging to a nation's central bank. The low level of activity from the wallets, with one address recording no outgoing transfers at all, supports the analysis that they were intended for long-term storage, insulating state funds from traditional financial system sanctions. Accumulation in the wallets largely ceased in late 2023, and they remained dormant until the enforcement action.
The seizure is part of a broader US campaign to counter Iran's use of cryptocurrency to evade economic sanctions. In January 2026, OFAC blacklisted two UK-registered exchanges, Zedcex and Zedxion, after TRM Labs identified about $1 billion in stablecoin flows connected to IRGC-controlled accounts. Despite these efforts, Iran's domestic crypto economy remains substantial, with trading volumes reaching $10 billion in 2025, according to TRM Labs.
The action sends a clear signal that the Treasury Department is prepared to treat on-chain reserve holdings with the same level of scrutiny as assets held in traditional bank accounts. As more nations explore digital currencies for state financial strategies, regulators are demonstrating their capacity to follow the money onto the blockchain itself.
This article is for informational purposes only and does not constitute investment advice.
