Can the same QR code be scanned by several people?

The fixed QR codes displayed by a merchant on or near the till, on digital displays or on paper invoices can be scanned by multiple payers, without each of them necessarily paying the same amount.

In the case of a person-to-person transaction, e.g. paying back a friend, the QR code which is displayed on the receiver's device can only be scanned by one payer.