Some cryptocurrencies use such identifiers to identify a transaction.
Depending on the currency you wish to swap, we may ask you to provide additional identifiers along with your wallet address.
For example:
- Payment ID used for Monero
- Destination tag is used for Ripple
- Memo used for Steem and Stellar
- Message is used for XEM
Such identifiers are important for sending coins securely. If you do not provide the required IDs, funds may be lost.