Coinworld News - On March 14, according to Whale Alert monitoring, 11,960,680 USDT held by an address on the Tron chain were just frozen by the issuer Tether. Tether implements the USDT freezing mechanism through the blacklist function built into its smart contract. After administrators call the addBlackList function to add a specific address to the blacklist, all transfers in and out of USDT from that address become invalid, the balance remains visible but is permanently locked. This is typically triggered by money laundering, fraud, or enforcement requirements related to sanctions. Tether has cumulatively frozen over $4.2 billion in USDT over the past few years, with most freezes occurring after 2023.