Why do you use QR codes for Yeokens? To give you a quicker, easier way to bank Yeokens. Simply open the camera on your smartphone and scan the QR code. Related articles How do I claim an offer? When does Yeokens finish? What happens if my QR code doesn't scan? How many different ways are there to spend your Yeokens? I'm not sure if my booking went through, how do I find out?