You can check whether a card has been stored against a members profile via the Payments tab in their profile.
If there is an existing stored card, you will be see a masked reference for their card which displays the last 4 digits of their card number.
To remove this card, click on the 'Remove stored card' button.
Add a Stored Card
If you would like to add a card to be stored, click on the 'Add new card button' (this will only be visible if a card is not currently stored).
Please note that it is only possible to store one card at a time.