Is the PDF/A-3 format mandatory in case that the taxpayer wants to send the invoice in PDF format or it is only a recommendation from ZATCA?

XML and business rules
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Is the PDF/A-3 format mandatory in case that the taxpayer wants to send the invoice in PDF format or it is only a recommendation from ZATCA?

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PDF-A/3 (with embedded XML) is mandatory

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I noticed that the official ZATCA document states that invoice documents should be shared in PDF/A-3 format with embedded XML. I generated a PDF, and its properties are as follows:

  • Standard: PDF/A-3B
  • ISO Name: ISO 19005-3

However, when I refer to the invoice properties of the ZATCA SDK, its properties are:

  • Standard: PDF/A-3A
  • ISO Name: ISO 19005-3

Will the PDF/A-3B format cause any issues? Additionally, does PDF/A-3 refer to the page size? Should I change the invoice’s page width and height to meet the PDF/A-3 requirements? Are there any PHP libraries available that support PDF/A-3?