In short
- The exchange checks every incoming deposit: if the coin history is linked to stolen funds, mixers, sanctioned addresses, or fraud, the deposit is frozen pending review.
- After the Binance hack, hackers are laundering about $2.4 billion. Exchanges have become stricter, and good-faith users who received coins through a chain of transfers are now more likely to face freezes.
- A freeze on an exchange and a Tether address block are different situations. In the first case, the exchange decides; in the second, the stablecoin issuer does.
- To unlock funds, you need documents proving the source of funds: trade history, statements, and proof of wallet ownership. KYC verification usually takes about 48 hours, while an AML review can take from several days to weeks.
- Do not pay “unfreezing specialists”: only the exchange makes the decision.
You sent USDT to an exchange, the transaction is confirmed, but the balance has not been credited or has been frozen, and the app shows a verification notice. This is not a glitch. The AML system was triggered: the exchange detected a risk in the history of your coins. Let’s look at why this happens, what to do, and how to prevent it from happening again.
- Why the exchange froze the deposit
- Freeze on an exchange or Tether block
- What restrictions are there and what to send
- How to unlock a deposit: step by step
- What documents help
- How to check USDT before a transfer
- If “tainted” USDT arrived via P2P
- Risks
- FAQ
- Why did the exchange freeze my deposit if I didn’t violate anything?
- How long does an AML check take on an exchange?
- What documents are needed to unfreeze a deposit?
- How does a freeze on an exchange differ from a Tether block?
- How do I check USDT before buying on P2P?
- Is it worth paying services that promise to unfreeze funds?
Why the exchange froze the deposit
Cryptocurrency stores the history of all transfers. The exchange analyzes it using blockchain analytics services and assesses the risk of each deposit. The main reasons for freezing are:
- Links to stolen funds. The coins passed through addresses associated with hacks, scams, or phishing. After the Binance hack on October 29, 2026, more of these coins appeared on the market.
- Mixers and obfuscation services. Tornado Cash and similar services are a red flag for any exchange.
- Sanctioned addresses and platforms. Links to sanctioned exchanges and swap services.
- Darknet and illegal services. Direct or indirect links to darknet markets.
- Unclear source of funds. A large deposit after a long period of inactivity, or P2P or OTC deals without documentation.
- Different exchange risk models. The same transaction may go through on one exchange and get stuck on another because they use different analytics providers and risk thresholds.
It is essential to understand that you may not have violated anything. It is enough to buy USDT from a seller who received it from a “tainted” source.
Freeze on an exchange or Tether block
| Exchange freeze | Tether address block | |
|---|---|---|
| What you see | The balance is visible in the account, but you cannot trade, withdraw, or convert it | The wallet address cannot send or receive USDT on the blockchain |
| Who decides | The exchange’s compliance team | Tether as the issuer of USDT |
| How to remove it | Through the exchange’s support team with documents | Only by Tether’s decision, usually at the request of law enforcement |
| Can it be prevented | Check the source of the coins before depositing | Check the sender’s address against Tether’s blacklist |
Situations may overlap: an exchange often freezes a deposit precisely because it came from an address on Tether’s blacklist.
What restrictions are there and what to send
| Reason for restriction | What to submit | How long to wait |
|---|---|---|
| Repeated identity verification (KYC) | Valid ID and proof of address | Usually around 48 hours after full submission |
| AML flag on the deposit | Statements, coin origin history, counterparty details | From several days to weeks |
| Jurisdictional restriction | Proof of country of residence | Until the residency issue is resolved |
| Law enforcement request | Documents will not help; the outcome depends on the request | Unpredictable |
The exchange states the reason in a notification inside the account. Which documents are required depends on it.
How to unlock a deposit: step by step
- Check the notification in your account itself. Do not trust messages in messengers or emails with links: scammers send fake “freeze notifications.”
- Determine the reason for the restriction. If it is unclear from the notification, ask support before sending documents.
- Gather the coin history. Where did the USDT come from: a purchase on another exchange, a P2P deal, payment for work. For each link in the chain — transaction hash, date, amount.
- Prepare the documents. Statements from the exchange where you bought the coins, the P2P order history with the seller’s details, a bank statement confirming payment, a contract or invoice if it is income.
- Submit the request only through official support. Use the chat in the app or the form on the exchange’s website. Include the case number in all further correspondence.
- Reply briefly and stick to the facts. No emotions or threats. Attach the documents as one package, not one by one.
- Follow up every few days. Refer to the case number. New tickets about the same issue only slow down the review.
Example of a short message in English:
Hello, my deposit of 2,500 USDT (TxID: …) on 31.10.2026 is under review. The funds come from a P2P purchase on [exchange] on 29.10.2026, order ID …, paid from my bank account. Attached: P2P order history, bank statement, screenshot of the withdrawal from [exchange]. Please let me know if anything else is required. Case ID: …
What documents help
| Where the coins came from | What to provide |
|---|---|
| Bought on another exchange | Purchase and withdrawal statement, screenshot of the withdrawal history with the hash |
| Bought via P2P | Order history with ID, seller’s name, bank statement confirming payment |
| Received as payment | Contract, invoice, correspondence with the client |
| Transferred from your own wallet | Proof of ownership of the address: a signed message or a transfer of a small amount at the exchange’s request |
| Held for a long time | Purchase statements, even if the purchase was made a long time ago |
How to check USDT before a transfer
- Check the sender’s or seller’s address before the trade. AML services show an address’s risk score and a breakdown of fund sources: exchanges, mixers, sanctions, fraud. Many offer a few free checks.
- Check the address against Tether’s blacklist. Free services show within seconds whether a USDT address has been frozen.
- Buy from verified sellers. A rating, a trade history and a payer name that matches the account lower the risk. A price well below the market is a red flag.
- Do not accept coins “in transit”. If someone asks you to receive USDT and send it on, that is a classic money laundering scheme.
- Keep records. Save transaction hashes, order screenshots and statements. They are the first thing you will need during a review.
If “tainted” USDT arrived via P2P
- Do not withdraw or send them any further until you understand the situation.
- Save everything related to the transaction: the order ID, the seller’s profile, the correspondence, and the payment statement.
- Contact the support team of the exchange where the P2P transaction took place: the seller may have sold stolen coins to many buyers.
- If the receiving exchange has frozen the deposit, attach this information to your request. It shows that you are a good-faith buyer.
We covered in detail how to protect yourself from triangle schemes on P2P in our article on the money mule law. If your USDT was sent to the wrong network, read the separate guide.
Risks
- Timelines are unpredictable. There is no standard timeframe for an AML review. Simple cases are resolved within hours, while complex ones can take weeks.
- A return to the sender is not guaranteed. Some exchanges return funds to the original address if their policies allow it, but they are not required to do so.
- Restrictions may extend to the account. During the review, the exchange may restrict withdrawals and other operations.
- Fake “unfreezing services.” Offers to speed up the review for a percentage are a scam. Only the exchange makes the decision.
- Wave after the Binance hack. While the stolen funds are being laundered through bridges, exchangers, and OTC, the likelihood of receiving linked coins is higher than usual. More details are available in the analysis of the Binance hack.
FAQ
Why did the exchange freeze my deposit if I didn’t violate anything?
The exchange analyzes the entire history of the coins, not just your actions. If the USDT previously passed through addresses linked to fraud, hacks, mixers, or sanctions, the AML system flags the deposit as risky, even if you acquired the coins legitimately.
How long does an AML check take on an exchange?
There is no standard timeframe. Repeat identity verification usually takes about 48 hours after all documents are submitted, while verification of the source of funds can take from several days to several weeks.
What documents are needed to unfreeze a deposit?
Documents that show the origin of the coins: a statement confirming the purchase on another exchange, the P2P order history and a bank statement confirming payment, a contract or invoice if this is income, as well as proof of wallet ownership.
How does a freeze on an exchange differ from a Tether block?
When frozen on an exchange, the balance is visible in the account, but operations are restricted, and the exchange makes the decision. When a Tether address is blocked, the blockchain address cannot send or receive USDT, and only Tether can remove the block.
How do I check USDT before buying on P2P?
Check the seller’s address in an AML service and against Tether’s blacklist, choose sellers with a high rating and transaction history, and be cautious if the price is noticeably below the market.
Is it worth paying services that promise to unfreeze funds?
No. The decision to unfreeze is made only by the exchange. Services that promise to speed up verification for money are most often scammers.
