How Tether and Circle Freeze Stablecoins, and What If USDT Is Blocked

Tether and Circle can block a specific address inside the USDT or USDC token contract, after which that address can no longer send those tokens. That is how about $1.79 billion was frozen within minutes of the suspected Binance hot wallet hack on October 29, 2026. If your own USDT is blocked, check the address in a block explorer, gather your transaction history and contact the issuer through its official site; nobody else can lift a freeze.

What happened on October 29

According to Decrypt, Circle froze 823 million USDC at the address that received funds from Binance hot wallets at 21:04 UTC, about 40 minutes after the first transfer, Circle CEO Jeremy Allaire said the freeze of "more than 800M USDC" was done "in coordination with law enforcement." Tether CEO Paolo Ardoino said at about 21:25 UTC that Tether "froze more than 1.567B USDT" related to the potential hack (The Block, Crypto Briefing). On-chain data cited by The Block show about $1.79 billion frozen across both issuers; Unchained notes it could see about 1.38 billion USDT frozen on Ethereum, so the issuer and on-chain totals do not match yet. Part of the USDT had already moved on before being blocked, per FinanceFeeds.

How an issuer freeze works

USDT and USDC are tokens issued by companies, and their contracts include an administrative blocklist. When the issuer adds an address, transfers of that token from the address fail. Other assets on the same address are not affected: ETH, TRX or other tokens there can still move. This is not a network-level ban; it is a rule of one token contract.

The April case is described in Tether's own announcement. For background on the mechanics, see can Tether freeze USDT.

How to check whether an address is frozen

1. Find the address in a block explorer for its network (Etherscan for ERC-20, Tronscan for TRC-20).
2. Try a tiny transfer from your wallet: a blocked address will fail with a contract error, not a network fee error.
3. On Ethereum, the USDT contract has a read function that returns whether an address is blacklisted; USDC has a similar check.
4. Make sure the problem is not something else: missing TRX for energy or ETH for gas looks similar at first glance. Validate the address format with our address validator.

Your USDT is blocked: what to do

• Do not send more funds to that address, and do not pay anyone who promises to "unfreeze" USDT. Only the issuer can do it.
• Collect evidence: where the funds came from, transaction hashes, exchange or swap order IDs, invoices or contracts.
• Contact the issuer only through the official tether.io or circle.com website. Expect the process to involve law enforcement or a court if the freeze was requested by them.
• If funds reached you from a hacked source by accident, say so openly and provide documents; do not try to route around the freeze.
• Move any other assets on that address to a fresh wallet if you suspect the address itself is compromised.

A detailed walkthrough of the issuer process is in USDT frozen by Tether: what to check.

How to avoid receiving frozen or flagged funds

Freezes after a hack often extend to addresses that received stolen funds afterwards. Accept stablecoins only from known counterparties, avoid "too good" P2P offers in the days after big incidents, and keep payment records. When you swap through a service, its AML checks may stop a transaction from a flagged source; our swaps follow the AML policy. For ordinary swaps, see USDT to BTC or USDC to USDT.