Editorial references
Start with the source.
Requirements can change. These links point to official material for further verification.
- European Commission: What is eInvoicing? ↗Definition of a structured eInvoice
- European Commission: European legislation on eInvoicing ↗Directive 2014/55/EU and the European standard
- European Commission: Compliance with the eInvoicing standard ↗Semantic model and UBL/CII syntax bindings
- European Commission: eInvoicing in public procurement ↗Public procurement scope and receiver obligations
- European Commission: eInvoicing country factsheets ↗Country-level research starting point
- European Commission: VAT in the Digital Age ↗EU VAT reform and phased measures
- OpenPeppol: Peppol BIS Billing 3.0 ↗Billing profile, information elements and validation
- OpenPeppol: Billing validation rules ↗Technical and business rule examples
- European Commission: eInvoicing implementation checklist ↗B2G implementation considerations
Explanatory guides also distinguish conceptual workflows from jurisdiction-specific requirements. Last reviewed 26 September 2026.