If you would like to no longer collect a certain custom field on your accounts or subscriptions, you can remove this data completely from your Recurly site. Navigate to Configuration > Custom Fields. Select the custom field you'd like to eliminate and click Options > Delete Custom Field.
Deleting a custom field definition from your site will cause all associated custom field data to be deleted. For example, if you are storing a custom field for Sales Rep which is populated with names on 100 accounts, you will lose this data for the 100 accounts when you delete the Sales Rep custom field definition.
This deletion is permanent and cannot be undone.
Make sure you are certain about what you are deleting before taking this action.