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AML API Screen addresses and transactions for risk
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USDT checker: is this address frozen or blacklisted?

Paste any USDT address to see if Tether has frozen or blacklisted it. Frozen USDT cannot be sent, so check before you accept a payment. The USDT checker is coming soon: free, with no signup, and it never asks you to connect a wallet.

Coming soon
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Auto-detect Tron (TRC-20) Ethereum (ERC-20) BNB Smart Chain (BEP-20) Solana (SPL) Polygon
  • Free
  • No signup
  • We never ask you to connect a wallet
What the result will showThe tool is not live yet. Request access and we will tell you when it is.
Frozen by Tether?Yes or no, read from the USDT contract.
On the USDT blacklist?The contract's own flag (isBlackListed).
AML risk bandLow, Medium or High.
Sanctions match?OFAC, UK, EU and UN lists.
USDT balanceOn the network you check.

Need the full AML report?

A 0–100 risk score, risk categories and the sources behind them come from the AML API. It is live today and paid from your Blockchain API credits.

Explore the AML API
Screen this address via API todayAML API
curl https://rest.cryptoapis.io/
  aml/addresses/TQn9…kEx \
  -H "X-API-Key: YOUR_API_KEY"
200 OKExample response
{
  "isFlagged": true,
  "riskBand": "severe",
  "riskScore": 100,
  "categories": [
    "sanctions"
  ]
}
We never ask you to connect a walletNo signatures, no seed phrases. Only public blockchain data.
Read-only checkWe look up public blockchain data. Nothing is sent or stored on-chain.
Inc Crypto APIs, Inc.Delaware, USA. Building blockchain APIs since 2018.
ISO 27001 certifiedIndependently audited information security.
Explainer

Why does Tether freeze USDT?

Tether freezes USDT when an address is linked to theft, hacks, scams, sanctions or a request from law enforcement. It adds the address to a blacklist inside the USDT smart contract, and from then on USDT on that address cannot be sent. Tether can later remove the address from the list or destroy the frozen tokens.

  • Funds stolen in a hack or exploit
  • Scam or fraud reports from exchanges and victims
  • Sanctions (for example OFAC listings)
  • Court orders and law-enforcement requests

Frozen, blacklisted, risky: what is the difference?

What it means
Can the USDT move?
Frozen
Tether added the address to the USDT blacklist.
No
Blacklisted
The same thing, as stored in the USDT contract (isBlackListed).
No
High AML risk
Linked to scams, hacks, mixers or sanctioned entities. Not frozen (yet).
Yes, but risky
Sanctioned
On an OFAC, UK, EU or UN sanctions list. Dealing with it can be illegal.
Do not accept

What to do if your USDT is frozen

Contact the exchange or service that sent you the funds, then Tether support with the transaction ID. Only Tether can unfreeze an address. Be careful: people who promise to unfreeze USDT for a fee are usually scammers.

How it will work

How will I check if a USDT address is frozen?

1

Paste the address

Any USDT address: Tron (T…), Ethereum or BSC (0x…), Solana and more.

2

We detect the network

The format tells us the chain. You can switch it by hand.

3

Read the result

Frozen, blacklisted, balance, risk band and sanctions in one view.

4

Automate it

Screen every deposit from your code with the AML API, live today.

Go further

Check every deposit automatically

AML API

Screen addresses and transactions for risk and sanctions from your code. Live today.

Explore the AML API
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Tron Energy

Sending USDT on Tron? Rent energy and cut TRC-20 transfer fees.

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Free AML check

A risk band and sanctions check for any wallet, not only USDT.

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FAQ

USDT checker questions

Is the USDT checker free?

Yes. The freeze and blacklist check will be free, with no account. The USDT checker is coming soon; request access and we will tell you when it is live.

How do I know if my USDT is frozen?

Tether marks a frozen address in the USDT contract (isBlackListed), and USDT on it cannot be sent. Until the checker is live, you can read that flag on a block explorer, or screen the address for risk and sanctions with the AML API.

Which networks will the checker support?

Tron (TRC-20), Ethereum (ERC-20), BNB Smart Chain (BEP-20), Solana (SPL) and Polygon are planned. The final list is confirmed at launch.

Do I need to connect my wallet?

No. The checker only reads public blockchain data. It never asks for a signature, a seed phrase or a wallet connection.

Can frozen USDT be unfrozen?

Only Tether can remove an address from the blacklist. Contact the exchange or service that sent you the funds, then Tether support with the transaction ID. People who promise to unfreeze USDT for a fee are usually scammers.

What does the AML risk band mean?

It sums up how closely an address is linked to risky activity, such as scams, hacks, mixers or sanctioned entities. The AML API returns it today, with a 0–100 score and the categories and sources behind it.

The USDT checker is coming soon

Free, with no signup. Request access and we will tell you when it is live, or screen addresses today with the AML API.

Request access Explore the AML API