I worked one summer (2014) manufacturing emergency stop buttons for ABB. We used SAP for our incoming orders. Each order was printed on paper as some kind of report from SAP and put in our physical inbox. When we had manufactured buttons for an order, we would go to a desk with two computers, both logged in to SAP. With the first computer we would scan a barcode from the order to find it in the system, mark the order…
If it was filed, my guess was that it was an internal control measure. They wanted to make sure there was a paper copy of every transaction for audit purposes, and what better way to make sure of that then requiring the paper to move the order forward?
If you tossed it, then it sounds like they were just too lazy to implement something other than the default config. :)