USDT and USDC Freezes: How Issuers Block Stablecoins and How to Avoid Getting Caught

USDT and USDC Freezes: How Issuers Block Stablecoins and How to Avoid Getting Caught

USDT and USDC freezes are a tool many people remember only after a major hack. On October 29, about 6.3 billion dollars was stolen from Binance, and within a couple of days stablecoin issuers had stopped more than a third of that amount.

Below, we look at how freezing works, who triggers it and why, and how an arbitrage trader can avoid ending up among those affected.

Can Tether freeze USDT

Yes. USDT and USDC are centralized stablecoins, and each has an issuer: Tether and Circle respectively.

The issuer mints and burns tokens, and it can also block a specific address. After that, the coins on it can be neither sent nor spent.

How freezing works in the smart contract

The USDT and USDC contracts include a blacklist of addresses. The issuer adds a wallet to it, and the contract rejects any transfers from it.

Tether has a further step: blocked tokens can be burned and the same amount reissued, this time to the victim. With Circle, a flagged address loses the ability both to send and to receive USDC.

This works on the networks where the issuer itself issues the token. Wrapped versions via third-party bridges are subject to the bridge's rules instead.

What requests lead to stablecoin freezes

• law enforcement requests in fraud and extortion cases
• hacks of exchanges and protocols, when the victim and analytics firms point to the attackers' addresses
• sanctions lists that include wallets
• court orders

From what we see, large freezes are most often tied to hacks: stolen stablecoins are easy to trace until they are swapped.

How the Tether and Circle approaches differ

Tether is known for freezing quickly and readily responding to requests from law enforcement in different countries. Circle has historically emphasized its reliance on legal requirements and regulation.

Both companies regularly take part in freezes after major hacks. The formalities differ, but the result for the attacker is the same.

Freezes after the Binance hack: a recent example

After the Binance hack on October 29, Tether froze about 1.6 billion dollars in USDT, and Circle about 800 million in USDC. Together that is roughly 2.4 billion, or more than a third of the stolen amount.

In our view, this is a clear advantage of centralized stablecoins. Bitcoin offers no such protection: the stolen BTC sit on addresses, and no one can stop them on the network.

What freeze risks an arbitrage trader faces

How to avoid a freeze: a checklist

• in P2P, choose counterparties with a long trading history and a high rating
• do not accept coins from questionable sources, even at an attractive rate
• in the days after major hacks, be especially careful with unknown senders
• keep capital in several stablecoins and on several exchanges
• transfer tokens on the issuer's native networks, not via unverified bridges
• keep your trade history: it will help if an exchange asks about the source of funds

A hypothetical example

The numbers below are hypothetical and serve only as an illustration. An arbitrage trader holds 30,000 dollars and compares two ways of storing it.

We believe splitting capital is the cheapest insurance. It does not get in the way of trading, and one bad P2P deal does not halt all of your work.

Our tools

Capital spread across several exchanges and stablecoins is easiest to keep working when prices on every venue are visible at once. Our arbitrage screener keeps dozens of venues in one window, refreshes quotes every second and shows each gap together with the volume actually behind it. The spread calculator helps you check what survives fees, network costs and slippage at your size. The bot is fully manual. It never connects to your exchange API keys.

To test the tools on a live market, ArbitrageScanner offers one day of free access to the whole ecosystem.

FAQ (Frequently Asked Questions)

1. Can Tether freeze my USDT?

Technically, yes: the USDT contract has an address blacklist. In practice, freezes target addresses linked to hacks, fraud, sanctions or court orders.

2. How does a USDT freeze differ from a USDC freeze?

With Tether, blocked tokens can be burned and reissued to the victim. With Circle, a flagged address can neither send nor receive USDC.

3. How many stablecoins were frozen after the Binance hack?

Tether froze about 1.6 billion dollars in USDT, and Circle about 800 million in USDC, roughly 2.4 billion together.

4. What should I do if an exchange froze my USDT deposit?

Contact support and prepare the trade history: who sent the coins and when. The more transparent the source of funds, the faster the review.

5. Can bitcoin be frozen?

Not on the network: bitcoin has no issuer. BTC can only be blocked in an exchange or custodian account.

6. How to avoid getting "dirty" USDT in P2P?

Work with counterparties that have a long history and a high rating, do not chase rates that look too good and be more careful in the days after major hacks.

Conclusion

Freezing USDT and USDC is a built-in contract function: the issuer adds an address to a blacklist, and the coins on it stop moving. It is triggered by law enforcement requests, after hacks, under sanctions and by court orders.

For an honest arbitrage trader the risk is small, but it exists, mainly in P2P. Vet your counterparties, do not take coins from questionable sources and keep capital in different stablecoins and on different exchanges.

IMPORTANT! We are software developers. We do not give recommendations or promises of earnings and we do not advise you to invest your money anywhere. Our software is fully manual, all your money stays under your own control. We show examples of how our clients have earned on arbitrage in the past, but we do not advise repeating those actions one to one. Your earnings depend solely on your own actions and on market factors.