This is actually totally possible with qr codes. (1) Print 100 qr code stickers that go to unique urls on a web service (2) web service serves "upload form" on

This is actually totally possible with qr codes. (1) Print 100 qr code stickers that go to unique urls on a web service (2) web service serves "upload form" on first render (or enter url form, whatever the user wants to "save"). (3) web service redirects to file download (or url) on all subsequent visits, no longer allowing upload. Sticky data you can put inside a book and retrieve later by scanning (or typing in the url, which was also printed on the sticker cause no one will actually use QR codes).