What a memo/tag is in crypto, when it is required, and how to avoid losing funds by missing it.
Sometimes a service gives you two things to receive crypto: an address and a memo/tag. If you forget the memo/tag, the transfer can arrive on-chain but not be credited to your account automatically.
Some platforms reuse one deposit address for many users. The memo/tag is the extra identifier that tells the platform “which user this deposit belongs to”.
You usually need a memo/tag when:
You are depositing to an exchange or custodial service.
The service shows a separate memo/tag field during deposit.
The service explicitly says “memo required”, “tag required”, or similar.
The transaction can still succeed on the blockchain, but the service may not know who to credit. Recovery is sometimes possible, but it can take time, require support, and may include extra verification.
If the recipient asks for a memo/tag, always include it before confirming the transfer.
Copy the memo/tag exactly as shown.
Double-check the network and recipient details (TON, TRON, Solana).
If you are unsure, ask the recipient service which details are required.
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