Verifying a swap address before you send funds

Every cryptocurrency swap works the same way at the mechanical level. You send funds to an address. The exchange detects the deposit. It sends your requested currency to a return address you provided. The entire process is a sequence of transactions on blockchains, and each transaction is permanent. There is no undo button. That is why the checks you make before you hit confirm matter more than anything you can do afterward.

The address you are sending to is not a random wallet. It is a deposit address generated specifically for your swap. The exchange creates it, watches it for incoming funds, and routes those funds into its internal systems. The address you receive back is the one you must provide accurately. If you send to the wrong address, or if you send the wrong asset, the money is gone. No exchange can reverse a blockchain transaction.

What actually happens between sending and receiving

You enter the amount you want to swap. You enter the destination address where you want to receive the output. The exchange generates a deposit address and shows it to you. You send your funds to that address. The exchange's software monitors the blockchain for a transaction matching the expected amount and asset. When it sees the transaction reach sufficient confirmations, it processes the swap internally. It then sends the output to your destination address from its own wallet.

There are several points in this sequence where things can break. Understanding each one helps you know what to check and what to do when something goes wrong.

The checks worth making before you send

How to verify a deposit address before sending crypto to an exchange. The address shown on the screen must match the address the exchange expects. Copy it. Do not type it. Compare the first few characters and the last few characters against what the exchange shows. If you are on a mobile device, compare the full address character by character. Malware that replaces clipboard content is real. If you are using a hardware wallet, verify the address on the device screen, not on your computer monitor.

How to check if a swap provider is licensed or registered in your country before you send. Some jurisdictions require exchanges to hold licenses. Others do not. If the provider claims to be registered, verify that claim against the regulator's official list. Unregistered providers are not necessarily fraudulent, but you lose the protection of local consumer laws. If the provider operates in a country with no licensing regime, you have no regulatory recourse at all. That is a fact, not a judgment.

How to tell if a swap site is holding your deposit in a shared wallet instead of a dedicated one. A dedicated address is generated for your swap alone. A shared wallet is one address used for many deposits. If the exchange uses a shared wallet, you cannot determine which incoming transaction is yours by looking at the address alone. The exchange must match deposits by amount and timestamp. This increases the risk of misattribution. You can check by inspecting the address on a block explorer before you send. If the address already holds a balance or has many incoming transactions, it is shared. Some exchanges use shared wallets deliberately. Others do not. The distinction matters because a shared wallet makes it harder to prove you sent funds if something goes wrong.

Reading the blockchain after you send

How to read a swap transaction on a block explorer to find out where your funds went. Once you send, the transaction appears on the blockchain. A block explorer shows the sender address, the recipient address, the amount, and the transaction ID. The recipient address should be the deposit address the exchange gave you. If it is not, you sent to the wrong address. The transaction ID is your proof of delivery. Save it. If the exchange claims it never received your funds, the transaction ID is the evidence that the blockchain disagrees.

What can go wrong and what cannot be undone

What happens to a swap when the receiving wallet is a custodial service that rejects the deposit. Some destination addresses belong to custodial wallets that have their own acceptance rules. If the wallet rejects the asset, the swap completes on the exchange side but the funds never arrive at your destination. The exchange shows the swap as finished. Your money is effectively stuck in limbo. The exchange can try to recover it, but that requires cooperation from the custodial service. There is no guaranteed fix.

What to do when a swap completes on the blockchain but the exchange says it failed. This happens when the exchange's internal system does not match the deposit to your swap. The transaction exists on the blockchain. The exchange can see it. But its software may have assigned the deposit to the wrong swap or flagged it as incomplete. Contact support with the transaction ID and the deposit address. The exchange has the ability to manually match the transaction. Whether it will depends on its policies. If the exchange does not respond, you have no further recourse.

What to do when an exchange asks for a selfie with your ID to release a stuck swap. Some exchanges require identity verification before they release funds. This is common when the swap amount exceeds a threshold or when the exchange's compliance system flags the transaction. You can refuse to provide the information. If you refuse, the swap remains stuck. The exchange will not release the funds. If you provide the information, the exchange may process the swap. There is no guarantee. The exchange holds your funds and your personal data. This is a decision you must make knowing that the exchange controls the outcome.

What to preserve before you hit confirm

What information to screenshot before you hit confirm on any swap. The deposit address. The amount. The asset. The destination address. The swap ID or order number. The exchange's stated exchange rate. The expected output amount. The transaction ID after you send. The block explorer page showing the transaction. These screenshots are your only evidence if something goes wrong. Without them, you have nothing to show support. With them, you have a record that the blockchain supports.

The final check is the simplest one. Read the address again. Confirm the network. Send a small test amount first if the swap size is large. Test transactions cost a fee but they cost less than losing the whole amount. Nothing in cryptocurrency is reversible. The checks you make before you send are the only protection you have.