Sorry, Willy. Really, this is a service for our customers to keep records. While the invoice/receipt that's uploaded is associated with a single tool, it's conceivable that you would have a receipt with multiple tools that you could upload once and add to a single tool. You could access it, print it, etc. as needed for all tools even though it's associated with just one.
Ideally, I would recommend that customers upload an invoice/receipt for every tool. There will be an option to create a service repair form from your tool registration. It will link to your uploaded proof of purchase, if one was provided, so that our service team can access it.
Shane