[smachiz]

The five finger discount is a risk regardless of payment method and doesn’t have a bearing on which method is superior.

NFC terminals aren’t expensive - especially since they can be a cheap phone now.

QR without validating payment received is probably only viable up to maybe $10USD before the risk of being defrauded is too high.

I bet you’ll find lots of one way QR shops have a phone that they verify they’ve received payment on anyway.

[scarmig]

It doesn't have a bearing on which method is riskier, but it does have a bearing on the idea that everyone is going to be generating fake receipts on their phones.

And, yeah, most places do verify based on another phone.

[smachiz]

At which point the QR is no better - and probably worse - than the stripe app and an NFC reader.