Peppol best practices: A guide for Belgian participants

On 1 January 2026, Belgium launched their B2B eInvoicing mandate, requiring all VAT-registered businesses to issue and receive structured eInvoices for domestic transactions.

Swiftly afterwards, BOSA (the Belgian Peppol Authority) conducted a review of Peppol participant registrations and identified organisations that – despite being eInvoicing-enabled – do not meet Belgian requirements and Peppol best practices.

Below, we’ve broken down the key issues identified in this review, and what your organisation can do to ensure that your access to the Peppol network is set up for success.

In their review, BOSA identified 3 main reasons that an organisation may not meet Belgian eInvoicing requirements:

In most cases, the first two reasons will result in a notice of non-compliance. Currently, participant publication in the Peppol Directory is not a mandatory requirement, but is increasingly treated as best practice; participants that are not yet published to the Directory may still be issued with a warning.

BOSA has indicated that where a business has a Belgian Enterprise Number, the corresponding 0208 participant must also be registered on the Peppol network.

Businesses without a Belgian Enterprise Number may be exempt from this expectation.

Each participant must register appropriate Peppol documents in their receiving capabilities. If one or both of the following are missing, the participant may be flagged as non-compliant:

The Peppol Directory allows trading partners to see who else is connected to the Peppol network, allowing them to assess their sending and receiving capabilities for eInvoices and other eDocuments.

Publishing data to the Peppol Directory is done by Service Metadata Publishers (SMPs), like Tickstar. Speak to your service provider and they can publish a listing for your organisation in the Directory.

Whether you are based in Belgium or elsewhere across the globe, these are best practices that all organisations can follow. Take time to review participant identifiers and billing requirements before finalising your connection, and ensure your business is listed on the Peppol Directory in order to make the most of your service – and avoid risking non-compliance down the road.

At Tickstar, we help you navigate Peppol connection and compliance with ease. Contact our team and our experts can guide you through each step to meet the requirements of your region.