What do FedEx International Labels look like? Is there a paperless invoicing option?

FedEx international labels are similar to those of USPS, where the customs information appears on the label itself. So, there is no need for additional customs forms, meaning customs forms through FedEx are basically paperless. 

The complete label looks like this:

The customs information looks like this:

Note: as can be seen, you can include multiple line items on the FedEx international label.