From the section "Orders", click on the “Order ID” to access this page
This page lists all items in an order.
There will be an invoice number generated for each order which the customer will receive in his receipt [Invoice number no longer available at pick-up from March 2019 onwards), you should refer to order ID instead]
To define the prefix for the invoice number, please submit a request to Partner Support.
You can print this page by right clicking the page and click print.