Memo and tag: what they are and why funds get lost without them
On networks like TON a single address receives transfers from thousands of clients. The memo tells the recipient whose payment it is.
When you fund an exchange account or pay a swap order on some networks, an extra field appears next to the address: Memo, Tag, Destination Tag or Comment. Many people see it as an optional note and skip it. As a result, the coins arrive at the right address but aren’t credited to the account, and a long exchange of messages with support begins.
In this article we explain what a memo and tag are, why they’re needed, which networks use them, what happens if you forget or mix them up, and how to enter them correctly when sending from a wallet and when withdrawing from an exchange.
Why a memo is needed at all
On networks like Bitcoin, Ethereum or TRON, a swap service can easily create a separate deposit address for each customer. The address immediately shows who sent the money.
On some other networks, creating a separate address for every customer is inconvenient or expensive. On the XRP Ledger, for example, activating a new address requires keeping a minimum XRP reserve on it, and TON and Stellar have their own account models. So exchanges and swap services use one shared address for all customers and, to tell transfers apart, ask you to attach a unique identifier — a memo.
It works like a bank transfer to a large company’s account: everyone pays into the same account but puts a contract number in the payment reference. Without the number, the money reaches the company, but accounting doesn’t know whose payment it is.
What the memo is called on different networks
The field’s name depends on the network and the wallet interface, but the meaning is the same.
| Network | Field name | What it looks like |
|---|---|---|
| TON | Comment, Memo | Text or a set of digits |
| XRP | Destination Tag | Digits only |
| Stellar (XLM) | Memo | Text or a number, depending on the memo type |
| Cosmos (ATOM) | Memo | Text or digits |
| Bitcoin, Ethereum, TRON, Litecoin | Not used | Each customer has their own address |
If a service shows a memo or tag field next to the address, it’s mandatory for that network and that address — even if your wallet calls it “optional”.
When a memo is mandatory and when it isn’t
A memo is needed wherever one address belongs to many people at once. Hence a simple rule:
- Sending to an exchange or swap service that shows a memo — always include it.
- Sending to a personal wallet — a memo usually isn’t needed: the address belongs to one person and the money will arrive anyway. Including a memo won’t hurt either.
- Receiving on an exchange — when withdrawing from another service, enter the identifier your exchange shows in its deposit section in the tag or memo field.
What happens if you forget the memo
A transfer without a memo isn’t lost: the coins arrive at the service’s shared address, as the blockchain shows. The problem is that the system can’t automatically tell whom to credit. The transfer lands on a list of “unidentified” deposits, and from then on everything depends on the service’s support.
To have such funds returned or credited, you usually need to:
- Contact support with the transaction hash, amount, time of the transfer and the address it came from.
- Prove that you sent it: for example, show your wallet history or sign a message with the sending address.
- Wait for manual processing: at large exchanges this can take from a few days to a few weeks, sometimes for an extra fee.
How to enter a memo correctly
When sending from a wallet
- Open the asset and tap “Send”.
- Paste the recipient’s address into the address field.
- Find the memo field — it may be called Memo, Tag, Destination Tag or Comment. In some wallets it’s hidden behind an “Advanced” button.
- Copy the memo from the order or deposit page with the button and paste it into that field.
- Check the amount and confirm the transfer.
When withdrawing from an exchange
The withdrawal form for these networks almost always has a separate Tag or Memo field. Paste the recipient’s identifier there. Many exchanges warn you if the field is empty — don’t ignore that warning.
Memo mistakes and what to do
| Mistake | Consequence | What to do |
|---|---|---|
| No memo | Funds sit on the shared address but aren’t credited | Contact support right away with the hash and transfer details |
| Wrong memo | The transfer may be credited to someone else or not identified | Contact support urgently: the sooner, the easier to fix |
| Memo added on a transfer to a personal wallet | No harm, the funds will arrive | Nothing to do |
| Memo from an old order | The transfer won’t match the current order | Contact support with the new order number and the hash |
| Sent to an exchange address that doesn’t support the network | The funds may be inaccessible to the exchange | Contact the exchange’s support |
Memos and scammers
On TON the comment field is visible to the recipient, and scammers exploit this: they send tiny transfers with comments like “You’ve received a reward, claim it at…”. Following such a link usually leads to a site that asks you to connect your wallet or enter your seed phrase. Don’t follow links from comments on incoming transfers.
Another scheme is “support” asking you to send funds “to verify the memo” or “again with the correct tag”. Real support matches transfers by hash and never asks you to send money again.
How it works at ROVEN exchange
At ROVEN exchange memos are used on TON, XRP, Stellar and Cosmos. If you pay an order on one of these networks, the memo is shown on the order page next to the address — copy it with the button and paste it into the corresponding field in your wallet.
If you’re receiving these coins on an exchange, the order form will show a memo field for the payout: enter the identifier your exchange displays. The operator checks for the memo before every payout.
If you did forget the memo when paying, contact support with the order number and transaction hash. The operator will find the transfer by amount, time and hash and complete the swap.
Where to find the memo field in popular wallets
Wallet interfaces differ, and the memo field goes by different names. Guidelines for popular wallets:
| Wallet | Network | Field name |
|---|---|---|
| Tonkeeper, Wallet in Telegram | TON | Comment |
| Xaman (formerly Xumm) | XRP | Destination tag |
| LOBSTR | Stellar | Memo |
| Keplr | Cosmos | Memo |
| Trust Wallet | Various networks | Memo, shown for networks that use one |
If you can’t see the field, look for an “Advanced” or “More options” button or a gear icon on the send screen. If the wallet doesn’t support memos for the network at all, use another wallet: sending without a memo to an address that requires one isn’t an option.
Why XRP uses only digits while Stellar can use text
The memo format is set by each network’s rules. On the XRP Ledger, a destination tag is an unsigned integer: it can’t contain letters, spaces or leading zeros, which wallets sometimes drop. Stellar has several memo types: text (up to 28 bytes), a numeric ID and a hash. The exchange states which type it needs, and it’s important to select exactly that type in the wallet.
On TON, the comment is plain text, so it must be copied exactly, without extra spaces at the start or end. The safest option is the “Copy” button on the order or deposit page.
Frequently asked questions
Can I add a memo after sending?
No, a transaction can’t be changed once it’s sent. But you can give the service the transfer hash — support will use it to find your funds and credit them manually.
Why doesn’t Bitcoin have a memo?
On Bitcoin, Ethereum and TRON it’s easy and cheap to create a separate address for each customer, so services tell transfers apart by address and no memo is needed.
Is a memo the same as a payment comment?
Technically it’s similar: text or a number attached to the transaction. But for the service it isn’t a comment; it’s your account identifier, and crediting depends on it.
Do I need a memo when sending TON to my own Tonkeeper?
No. A personal wallet belongs only to you, so the transfer will arrive without a comment.
