Use primary sources for current requirements
A regulation summary can become outdated when a mandate, technical specification, or implementation date changes. For production decisions, start with the official authority or network that receives the invoice. Use secondary articles only to understand the topic, not as the final source of compliance requirements.
- Italy: consult the Agenzia delle Entrate and Sistema di Interscambio documentation for FatturaPA.
- Germany: verify the current XRechnung and public-sector receiving requirements.
- Peppol: check the current BIS Billing specification and validation artefacts.
- European semantics: use the current EN 16931 documentation and applicable national CIUS.
- France and other countries: verify the current national timetable before relying on a target format.
A practical compliance checklist
Before selecting a conversion route, record the following:
- Where the supplier and buyer are established.
- Whether the transaction is B2B, B2G, or another regulated category.
- Which recipient system, access point, or government portal will receive the document.
- Which syntax, profile, document identifier, and version that channel accepts.
- Which validation artefacts and business rules apply to the invoice.
- How originals, converted outputs, notifications, and audit evidence will be retained.
What conversion can and cannot do
A converter maps data from one syntax to another. It can help with namespaces, element structure, code mapping, totals, and readable output when the source contains the necessary information. It cannot decide whether a business is subject to a mandate, invent a missing buyer identifier, or guarantee acceptance by a tax authority or access point.
Keep the source file, conversion result, validation report, and any delivery acknowledgement together. This makes it easier to investigate a rejection and to demonstrate how the final document was produced.
Important limitation
This page is general technical guidance. It is not legal, tax, or accounting advice. Confirm the current requirements with the relevant authority, recipient, or qualified adviser before using a converted invoice in a regulated transaction.