You can delete any of the accounts in a given location if that account does not have any lanes associated with it.
To delete a Worldpay account
How to get there
If you are not already viewing the correct location, select it on the Location menu.
On the Settings menu, under Location, click (or tap) Credit Card Options.
The Credit Card Options page opens.
On a location's Credit Card Options page, under Worldpay Accounts, select the account that you want to delete.
Note: To delete the selected account, there cannot be any lanes associated with it. The number next to the account name in the Worldpay Accounts list must be a zero (0).
The details of the account become available.
Click (or tap) Delete Account.
A confirmation message appears.
Click (or tap) Delete.