# PDF A3 - B2B model **URL:** \ **Category:** Clearance and Reporting\ **Created:** [August 24, 2023, 11:24am UTC](https://zatca1.discourse.group/t/pdf-a3-b2b-model/624 "2023-08-24T11:24:08Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![RPATHANG](https://avatars.discourse-cdn.com/v4/letter/r/9fc348/32.png) [@RPATHANG](https://zatca1.discourse.group/u/RPATHANG)\ **Post date:** [August 24, 2023, 11:24am UTC](https://zatca1.discourse.group/t/pdf-a3-b2b-model/624/1 "2023-08-24T11:24:08Z")
1. How do we validate the PDF Invoice copy is belonging to PDF/A3 because all the PDF files are having .pdf as extension? 2. If we see an XML attached to the PDF invoice, then can we consider that it belongs to PDF A/3 family ? 3. If we are sending regular PDF Invoice format and Inbound response received from ZATCA as two separate attachments in one email to our customers, does this qualify as EInvoice compliant ? ---
**Author:** ![hbinmahboub](https://avatars.discourse-cdn.com/v4/letter/h/50afbb/32.png) [@hbinmahboub](https://zatca1.discourse.group/u/hbinmahboub)\ **Post date:** [October 3, 2023, 6:38am UTC](https://zatca1.discourse.group/t/pdf-a3-b2b-model/624/2 "2023-10-03T06:38:39Z")
please check the published international standards for this file type. ---
**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, 8:12am UTC](https://zatca1.discourse.group/t/pdf-a3-b2b-model/624/3 "2024-10-07T08:12:07Z")
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?