Re: Paying for fuel
It clearly states within the App and on the pump to REMAIN IN YOUR CAR AND SCAN THE QR CODE and LEAVE YOUR PHONE IN THE CAR AS MOBILE PHONES ARE PROHIBITED ON THE FORECOURT.
It is rubbish though, often the 'system' is down and you have to preselect the amount of fuel you want to dispense and if you dispense less, it takes 7 days to get a refund. It is much easier to use a pay at pump station or visit the kiosk, it is only useful if you are money laundering or forgot your wallet but have your phone.
The only use I have found for QR codes in recent years in enrolling mobile devices in Meraki Systems Manager MDM.