Scanning slips that come with removal orders from FBA inventory

This might be an obvious issue, but I’m a small-scale seller.

When I recall my inventory from Amazon FBA storage to free up some space, there are return slips are shipped inside the box.

You know, the small piece of paper that provides information such as quantity, item name, ASIN, UPC/EAN, shipment ID, and so on.
I was wondering if there is a tool, service, or an API that would allow me to scan the slips to automatically update my inventory. Right now, I do it manually, and it’s not a huge issue, but I would like to know if there’s an automated way, and I’m sure it exists.