Symptoms
A customer has some order that has already been provisioned but is still unpaid. In PCP\RCP this orders has a status "Waiting for Payment after provisioning" but in CCP v2 > Account > Orders and Invoices > View Orders the order is displayed as "Completed".
Cause
CCP v2 displays all provisioned orders as "Completed" because a service has already been provided to a customer. No actions are available for the customer regarding this order (since it is not possible to cancel already provisioned order).
Resolution
The only action the customer can do is to pay an invoice generated for the order. A list of all invoices can be found at the CCP v2 > Account > Orders and Invoices > View Invoices screen.