USDT as a Tool for Global Surveillance: Why Bitcoin Remains the Only Insurance Against Freezing
Digital Dollar with a "Stop" Button
With a market capitalization of around $186 billion, USDT has become a global digital dollar for millions of users. However, beneath this apparent simplicity lies a fundamental vulnerability: the token's issuer can freeze funds at a specific address at any time — and does so regularly.
In just the last six months, Tether has blacklisted 2,362 addresses on the Ethereum and TRON networks, freezing $1.64 billion on them. These decisions typically target hackers and scammers, but the very architecture of the freeze means that even on a non-custodial wallet, the holder does not have full control over their tokens.
How the Freeze Mechanism Works
USDT is a centralized stablecoin, and Tether does not hide this. Company CEO Paolo Ardoino directly emphasizes this feature, often contrasting the token with Bitcoin as an alternative. The ability to block an address and forcibly destroy tokens is embedded in Tether's smart contracts on Ethereum (ERC-20), TRON (TRC-20), Solana, and other networks.
The mechanism includes three key functions:
- addBlackList — the address owner loses the ability to send USDT; any transfer is rejected at the contract level. The address remains active for receiving new tokens and managing the network's native coin (ETH, TRX, SOL).
- removeBlackList — restores the ability to transfer tokens.
- destroyBlackFunds — permanently burns USDT at the blocked address. The owner will no longer be able to recover them.
After burning, Tether can issue an equivalent volume of tokens at another address — for example, to return funds to victims or transfer them to wallets under law enforcement control. In other words, the issuer can take dollars from one address and reissue them in favor of another.
According to BlockSec, it takes an average of about two days between issuing a freeze order and its execution on the network. You can check the status of an address on the Ethereum and TRON networks through the company's special checker.
Promissory Note vs. Digital Gold
Behind each freeze is an external request. Tether freezes an address based on a single verified request from law enforcement — without warning the holder or providing an appeal procedure before the freeze. The T3 Financial Crime Unit (T3 FCU) — a joint project of Tether, TRON, and analytics firm TRM Labs — executes the freeze within 24 hours. Created in September 2024, the alliance had frozen over $450 million across 23 jurisdictions by May 2026.
Stablecoins themselves are identified for freezing by on-chain analytics companies like Chainalysis, Elliptic, and TRM Labs. They assign risk levels to wallets and link them together. If an address receives a high risk score, AML systems also raise the assessment for wallets associated with it. Sometimes, random users whose coins once passed through a recognized "dirty" address end up under restrictions.
Analysts also track Bitcoin, but taking it from its owner without private keys is impossible. USDT and USDC are debt obligations of a centralized issuer. It retains control at the contract level: blocks transfers, burns balances, reissues amounts. The holder controls the private keys, but not the token's rules. Bitcoin has no administrator, no blacklist functions, and no "big red button" destroyBlackFunds. There is simply no one to execute such a request.
However, the risk of freezing does not disappear entirely — it shifts from the protocol level to the level of exchanges, exchangers, and other centralized services, where users have their documents checked and can have their accounts frozen.
Panopticon Tether
The freeze function helps investigate crimes and return funds to scam victims. During its operation, T3 FCU has been involved in cases related to money laundering, drug trafficking, terrorist financing, and the activities of North Korean hacker groups. FATF has called the unit an "invaluable resource for law enforcement agencies worldwide." Such activities contribute to growing regulatory trust in the crypto industry as a whole.
But this system also has a downside. USDT remains a centralized asset, and access to funds ultimately depends on decisions by the issuer and requests from authorities. Essentially, the stablecoin has become a node in a global surveillance system: a private company, connected to hundreds of agencies and analytics services, can freeze "digital dollars" almost anywhere in the world.
The USDT ecosystem resembles a digital panopticon: most users never directly encounter restrictions, but know that such a possibility exists. The effectiveness of this mechanism strengthens regulatory trust, but simultaneously blurs the boundaries of financial autonomy.
My analysis: Diversifying among major stablecoins only spreads the dependency across different companies, but the freeze architecture itself remains. Bitcoin, on the other hand, has neither an administrator nor a single control center — it cannot be frozen, seized, or burned by a third party's decision. This makes the first cryptocurrency the only major digital asset that does not depend on decisions by an issuer, regulator, or bank. However, Bitcoin does not conceal financial activity: all transactions are recorded in a public ledger. Reducing the digital footprint requires additional privacy tools.