- Argentina: QR code to be mandatory mentioned on invoices
- Croatia: QR Code as a mandatory invoice element from 2021
- Germany: QR Code can be used to shorten the receipt!
- Greece: Interconnection of tax mechanisms (cash registers, etc.) with AADE Gradually, and until November 2021, companies that have electronic tax mechanisms (FIM) are required to: upgrade their tax mechanisms to produce receipts with the QR Code of identification of the tax mechanism and the receipt integrated
- India: QR code on B2C Invoices
- Portugal: Mandatory as of 2022
- Saudi-Arabia: QR Code mandatory to be mentioned on B2C e-invoices as of Deccember 4, 2021

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