Please note: it is important to grant user permissions to allow access to the Contact Details section.
This is how you edit or remove Contact payment details:
Find your Organisation and open the Contact Payment Details page under Workflows And Settings.
Select the Contact whose payment details you want to change and click on the EDIT button :
You can change the:
To remove the payment details of a Contact, click on the REMOVE PAYMENT DETAILS button.
When finished, click on SAVE.