If you've upgraded your client's website and are paying on their behalf but now wish to switch to your client paying the bill.
1. You will need to get your client to update their card details in the My Account area of their website dashboard.
2. Make sure your client's contact details are up to date including the address and phone number.
3. Make sure your client's email address is set as the Dashboard/admin email and update the billing email address in their dashboard so that future invoices will get sent to them directly.