Peppol has released version 3.0.20 of the BIS Billing 3.0 specification. The November 2025 update refines validation rules, improves technical consistency, and confirms that invoice image attachments such as PDFs are permitted again.
This update matters for any organisation exchanging structured invoices via Peppol, especially where validation rules and attachments are part of day to day invoice processing.
Alternative title
What changes in Peppol BIS Billing 3.0 v3.0.20 and why it matters
Peppol continues to evolve BIS Billing 3.0 to improve interoperability and data quality across the network. The v3.0.20 release is mainly a compliance and specification maintenance update, but it can still affect validation outcomes and implementation choices.
This release also fits into broader Peppol developments. For background, see our earlier post on the new global Peppol e-invoicing standard for 2026. If you need country context, you can also review how Peppol supports Belgium’s 2026 mandate and how Slovakia is preparing Peppol infrastructure for national e-invoicing.
The latest version of the specification is available here: Peppol BIS Billing 3.0 2025 Q4. For the detailed list of changes, see the official release notes.
What changed in version 3.0.20
The most notable change concerns invoice attachments. Earlier versions prohibited attaching invoice copies in image formats such as PDF. In v3.0.20 this restriction has been removed, which makes such attachments compliant again.
This supports common business requirements, for example internal approvals, archiving, or sharing a human readable invoice copy with stakeholders. The structured invoice remains the leading document for processing and compliance purposes.
In addition, Peppol has refined compliance rules and improved the technical structure of the specification. These changes help reduce ambiguity in validation and improve consistency for implementers.
What companies should check
Even small specification updates can have practical impact. Validation changes may affect invoice generation, mapping rules in ERP or middleware, and automated compliance checks. If you support multiple trading partners or operate across several countries, keeping alignment with the current BIS version reduces avoidable rejections and exceptions.
If you want a practical overview of Peppol basics and how it connects to implementation choices, you can also download our Peppol datasheet.
Key takeaways
- Peppol released BIS Billing 3.0 v3.0.20 in November 2025.
- The update refines compliance rules and improves technical consistency.
- Invoice image attachments such as PDFs are allowed again.
- Structured invoice data remains the leading document for processing and compliance.
- Companies should check validation logic and attachment handling in their e-invoicing flow.
Changes companies need to implement include reviewing attachment handling, validating invoice logic against the updated rules, and confirming alignment with Peppol BIS Billing 3.0 v3.0.20.
