Frozen USDT: why Tether blocks addresses and how to avoid receiving it

Tether's Terms of Service allow it to freeze tokens and blacklist addresses where required by law or where it considers it prudent. In practice the common triggers are:

• Law-enforcement requests in theft, fraud, ransomware and money-laundering cases.
• Hacks and scams: when stolen funds gather in an address, that address and the cash-out path are often frozen.
• Sanctions: addresses listed on official sanctions lists such as OFAC's SDN list.

An important consequence: an address can be caught up in an investigation simply because it received funds from a tainted one. Your risk depends on who you receive USDT from.

• Check the sender's address before you receive. In P2P and OTC deals, or when selling goods and services, get the counterparty's address before the deal closes and run it through the checker above.
• Be wary of below-market offers. Discounted USDT is a classic way of cashing out stolen funds.
• Watch for warning signs: brand-new wallets with huge turnover, pressure to split the amount into many small transfers, or funds arriving straight from a mixer.
• Keep records: transaction hashes, addresses, invoices or contracts, and the screening report.
• For businesses: one-off checks are not enough — put customer and counterparty addresses under continuous KYT monitoring so you are alerted if an address becomes high-risk later.

1. Confirm the status using the read functions of the USDT contract on Tronscan or Etherscan.
2. Collect evidence: transaction hashes, the origin of the funds and any deal documents.
3. Use official channels: your exchange's support if a deposit is held, or Tether's official support at tether.to if the address itself is blacklisted.
4. Beware of "unfreeze" scams. Only Tether can remove an address from the contract blacklist. Anyone promising to unfreeze USDT for an upfront fee is almost certainly a scammer.