# Query Regarding PDF/A-3 format

**URL:** https://zatca1.discourse.group/t/query-regarding-pdf-a-3-format/3540
**Category:** General
**Created:** [October 7, 2024, 3:22pm UTC](https://zatca1.discourse.group/t/query-regarding-pdf-a-3-format/3540 "2024-10-07T15:22:58Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![arjun\_tech24](https://avatars.discourse-cdn.com/v4/letter/a/7993a0/32.png) [@arjun\_tech24](https://zatca1.discourse.group/u/arjun_tech24)
#### Post date: [October 7, 2024, 3:22pm UTC](https://zatca1.discourse.group/t/query-regarding-pdf-a-3-format/3540/1 "2024-10-07T15:22:58Z")

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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’m currently using the mPDF library in PHP, but it only supports PDF/A-1B, producing output with the following details:

- **Conformance:**
  - **Standard:** PDF/A-1B
  - **ISO Name:** ISO 19005-1
  - **Status:** Not yet verified

- **Output Intent:**
  - **Identifier:** sRGB IEC61966-2.1
  - **Info:** sRGB IEC61966-2.1 (with XML embedded)

Will this PDF/A-1B format cause any issues? Also, does PDF/A-3 refer to the page size? Do I need to change the invoice page width and height to meet the PDF/A-3 requirements?

Are there any PHP libraries available that support PDF/A-3?