When you generate a Ripple (XRP) deposit address for your Kraken account, a unique and mandatory ‘Destination Tag’ is also generated.
The Destination Tag is used to determine what account a deposit should be assigned and credited to. This is because all Kraken accounts share a single Ripple (XRP) deposit address:
The Destination Tag is ten numbers long and must be included with all Ripple (XRP) deposits to your Kraken account. An example Ripple (XRP) Destination Tag is:
Always ensure to include the correct Destination Tag before sending your XRP deposit.
WARNING: Forgetting to include the Destination Tag will lead to significant delays in crediting the deposit to your account, and might even make the deposit irretrievable in certain cases. If you forgot the tag submit a support ticket here.