List of QR Code format we found on some invoices
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* For SEPA QR payment Code format (Europe)
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https://en.wikipedia.org/wiki/EPC_QR_code#Generators



* For ZATCA QR Code format (Saudi Arabia)
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https://www.pwc.com/m1/en/services/tax/me-tax-legal-news/2021/saudi-arabia-guide-to-develop-compliant-qr-code-for-simplified-einvoices.html