ZUGFeRD and Factur-X are hybrid electronic invoice formats that combine PDF and XML files. ZUGFeRD 2.3 and Factur-X 1.0.07 are fully compatible and technically identical, based on the UN/CEFACT CII D22B standard.

These formats comply with the European standard EN 16931, which regulates electronic invoicing for public sector customers (B2G).

Key Components of Compliant E-Invoices

To ensure compliance with ZUGFeRD and Factur-X standards, e-invoices must include:

1. PDF/A-3 Format: The PDF part must conform to the PDF/A-3 standard (ISO 19005-3).
2. Embedded XML: An XML file containing structured invoice data must be embedded within the PDF.
3. Authenticity and Integrity: Measures to ensure the invoice's authenticity and integrity, such as digital signatures.
4. Standard Data Fields: Include mandatory fields as specified by EU Directive 2014/55, Article 6.

Compliance Checklist

Format and Structure

• Use the latest version of ZUGFeRD/Factur-X (currently 2.3/1.0.07).
• Ensure the invoice is in PDF/A-3 format.
• Embed a compliant XML file within the PDF.
• Adhere to the UN/CEFACT CII standard for XML structure.

Data Requirements

• Include all mandatory fields as per EU regulations:
  • Process and invoice identifiers
  • Invoice period
  • Seller and buyer information
  • Payee details
  • Tax representative information (if applicable)
  • Contract reference
  • Delivery details
  • Payment instructions
  • Allowance or charge information
  • Invoice line item details
  • Invoice totals
  • VAT breakdown

Security and Authenticity

• Implement digital signatures to ensure authenticity and integrity.
• Use secure transmission methods, such as end-to-end encryption.

Profiles and Compatibility

• Choose the appropriate profile (Minimum, Basic, Comfort, or Extended) based on your business needs.
• Ensure compatibility with both ZUGFeRD and Factur-X standards.

Legal and Regulatory Compliance

• Adhere to country-specific e-invoicing regulations.
• Comply with VAT/GST requirements in relevant jurisdictions.
• Maintain accurate records for audit purposes.

Implementing E-Invoice Compliance

To successfully implement e-invoice compliance:

1. Partner with a reliable access point provider.
2. Register on the appropriate e-invoicing network.
3. Connect your accounting or billing software to the network.
4. Regularly update your e-invoicing system to comply with the latest standards.
5. Train staff on e-invoicing procedures and compliance requirements.

Addressing Common Challenges

When implementing e-invoice compliance, be prepared to address:

• Integration with existing financial systems
• Ensuring data accuracy and completeness
• Managing cross-border transactions and varying regulations
• Keeping up with evolving standards and requirements

By following this checklist and staying informed about the latest developments in e-invoicing standards, businesses can ensure compliance with ZUGFeRD and Factur-X requirements, streamline their invoicing processes, and maintain regulatory adherence across various jurisdictions.