IC transit cards in Japan use heat-rewritable ink for something similar. The ticket vending machines print your monthly transit passes right onto the face of y

IC transit cards in Japan use heat-rewritable ink for something similar. The ticket vending machines print your monthly transit passes right onto the face of your card at the beginning of the month, and erase it after it expires. It's not a QR code though. Just human readable text for bus drivers. (Turnstiles in the subway still read the pass via NFC.)