In order to trace a paid order, you have to find in in the 'Orders' section of your account.
- Open 'My account' (1) -> 'Documents' -> 'Orders' (2)
- Select the order for which you want to trace the shipment and click the the 'Track & Trace' link (3)
This will open a pop-up window where you can trace your shipment.
Moreover, after having paid your order an email is sent to you including your tracking number and a link to trace it as well.