To perform this task you need to be able to access Roundsman Enterprise.
Launch Roundsman Enterprise.
Go to the desired Account via the Search Function.
Click on Credit / Debit Card List on the right-hand side.
Select the Credit / Debit Card in question.
Press Delete in the top left.
This will now delete the Credit / Debit card from the account, please note once this has been done it cannot be reversed and is permanently deleted.