Reference
PDF/A-3
PDF archival standard allowing embedded files (used for ZUGFeRD/Factur-X).
Explanation
Lets you keep a human-readable PDF and embed the XML invoice as an attachment.
Commonly used for long-term archiving and audits.
This article treats PDF/A-3 as a practical reference, not just a navigation page. It explains the term or workflow in context, shows why it matters for European e-invoicing, and connects the topic to invoice creation, validation, routing, archiving, and ERP implementation decisions.