What Is a Memo or Tag in Crypto Transfers, and What Happens If You Forget It?

A memo or tag is a short extra code some coins need so an exchange knows which customer a deposit belongs to. If you forget it, the coins still reach the exchange, but they land in a shared pot and never show up in your account. You can usually get them back, but it takes a support ticket and some patience.

Why do some coins need a memo or tag?

For some networks, an exchange gives all its customers one shared address instead of a separate one each. Think of a big office building with one street address: the memo is the apartment number. Without it, the mail reaches the building, but nobody knows whose door to put it under.

The coins that work this way include XRP (it calls the code a "destination tag"), Stellar (XLM), Cosmos (ATOM), Hedera (HBAR) and TON. Bitcoin, Ethereum and Solana do not use memos on most exchanges. The same code may be called memo, tag, comment or payment ID — it is the same idea.

What happens if you forget the memo?

The blockchain part works fine: the transfer confirms, and a block explorer shows the coins arriving at the exchange. What fails is the last step — crediting you. Your balance stays at zero because the exchange cannot match the deposit to your account.

To recover it, contact the exchange's support. Binance, Kraken and Coinbase all have a form for missing memos. You will usually need:

• the transaction ID of your transfer;
• the amount, coin and time you sent it;
• proof that you control the sending wallet, such as a screenshot.

Expect it to take days or weeks, and some exchanges charge a recovery fee. Sending to a personal wallet, like a Ledger or Trust Wallet address, needs no memo at all.

How do you avoid it next time?

When you copy a deposit address, look for a second field right below it and copy that too. Paste both, and send a small test amount first.

If your coins have left but still aren't showing, go through the other causes in 8 reasons your crypto withdrawal is stuck. And if your transfer hasn't even confirmed yet, pending crypto transactions explains what's going on.