Why transfer mistakes are hard to undo
With a bank transfer sent in error, there is at least a procedure for requesting a return through the bank. With a blockchain transfer, once it is confirmed the sender has no way to cancel it. If the receiving address belongs to an exchange, the exchange may look into it and try to recover the funds, but it is not obliged to, it takes time and fees, and often recovery is impossible. Transfers are therefore a task where checking matters more than speed. Most mistakes come from one of three things: the network, the address or the memo.
A different network means no arrival
Coins with the same name are often issued separately on several blockchains. Dollar stablecoins, for instance, circulate on multiple networks. If the network you choose on the sending exchange differs from the one the receiver supports, the coins land where the receiver is not looking and are not credited. Address formats can look alike, so the withdrawal screen sometimes goes through without an error; do not assume you are safe just because nothing stopped you.
- Check the supported networks on the receiver's deposit screen first
- Choose the same network on the sender's withdrawal screen
- Compare the exact spelling when network names look similar
- Never send over a network missing from the supported list
Copy the address, then compare it
Addresses are long, irregular strings, so typing them by hand invites mistakes. Always copy and paste, then check the first and last several characters against the original by eye. Some malware quietly swaps a copied address for a different one. Reusing an address straight from your past transaction history is also risky: some attackers send tiny amounts from addresses whose first and last characters resemble yours, hoping you will copy the wrong one later. Saving frequently used addresses in the exchange's address book, after verifying them, is safer.
Do not forget the memo or tag
For some coins, an exchange receives many users' deposits at one address and tells them apart using a number or text called a memo or tag. Leave it out or get it wrong, and the coins reach the exchange's address but are not credited to your account. You then have to ask the exchange for a separate recovery, which can take a long time and carry a fee. Sending to a personal wallet, by contrast, often needs no memo. If the receiver's deposit screen has a memo field, make copying that value along with the address your default.
Small test transfers
When sending a large amount to a new address or over a new network, sending a small amount first and confirming it arrives is the surest safeguard. It costs one extra withdrawal fee, which is small compared with what you could lose by sending to the wrong place. Confirm the small amount actually shows up in the receiving balance, then send the rest. Bear in mind that each exchange sets a minimum withdrawal amount, and you cannot send less than that.
Problems specific to exchange-to-exchange transfers
Moving between exchanges has variables beyond the blockchain itself. Deposits and withdrawals for a coin can be suspended temporarily for wallet maintenance or network issues. Korean exchanges also run checks that share sender and recipient information under set criteria, so transfers to unsupported exchanges or personal wallets may be restricted. Some exchanges hold withdrawals for a period after certain account changes for security reasons. The specific criteria can change, so check both exchanges' official notices before sending.
- Whether both exchanges currently allow transfers of the coin
- Whether the destination exchange is supported
- Withdrawal fees and minimum withdrawal amounts
- Confirmations and waiting time needed for crediting
If you sent it wrong
Once you notice a mistake, first get the transaction ID from your withdrawal history and check on a blockchain explorer where the funds actually went. If the receiving side is an exchange, contact its support team with the transaction ID, the coin and network you sent, and any missing memo. Whether recovery is possible, and what it costs, depends on the exchange's policy, and sometimes it cannot be done. If someone contacts you first offering to help with recovery, suspect a scam. Anyone asking for your recovery phrase or private key is a scammer by definition.
Final checks before sending
Following the steps below the same way every time prevents most mistakes. The more you hurry, the more you skip, so when markets are moving fast it is safer to slow your transfer down by a beat. This article covers general precautions for transfers, does not recommend any exchange or asset and is not investment advice.
- Do the coin and network match the receiving side?
- Did you compare the first and last characters of the address?
- If the coin needs a memo or tag, did you enter it?
- For a new route, did you send a small amount first?
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