On April 3, the U.S. Treasury's Office of Foreign Assets Control (OFAC) announced that it has added 8 TRON wallet addresses associated with Yemeni Houthi militants to its Specially Designated Nationals and Blocked Persons (SDN) list, alleging their involvement in illegal financial activities through Tether (USDT). The Treasury stated that the network is controlled by Sa'id al-Jamal, a senior Houthi financial official based in Iran, involving the procurement of sensitive goods such as Russian weapons and stolen Ukrainian grain, which are transported to Houthi-controlled areas. Sa'id al-Jamal has been designated as a global terrorist since 2021. These wallets have been active since 2023, frequently using USDT, with some transaction amounts reaching $1 million. The sanctions are based on Presidential Executive Order 13324, aimed at freezing terrorist organization assets and prohibiting U.S. citizens from engaging in transactions with them.

Tether has not yet responded to media inquiries regarding their awareness of these sanctions. To date, Tether has blocked over 2,100 addresses, involving funds exceeding $1.3 billion.