Comment by bayesianbot

Thailand has a similar system - you use your banking app to scan a QR code, either the code is generated and has the amount included or it's printed static paper and you write the amount yourself, then show the receipt to the merchant or they check the notification in their phone. Started in 2017, nowadays it's everywhere, I can go to local market and pay $0.5 products with it. My 12 year old daughter opened her own account as well and didn't need my help, only installed an app and went to ATM that has a special slot for ID card to verify identity. Quite convenient as no need to carry cash anymore.