After billing the Charge, you should mark it as 'Billed' to avoid billing the same charge more than once (this is done automatically for Charges that are included in QuickBooks Invoices). Right click on the Charge > Mark as Billed, or enter the charge details and click on the Mark as Billed button on the toolbar (if you don’t see the Mark as Billed option, this is because the charge’s status is Not Billable).