E-invoicing in Belgium: All for One's successful Go-Live for the Steel Industry

Belgium is one of the countries where mandatory B2B e-invoicing currently poses a challenge for companies using SAP. For manufacturing organizations, this means having to integrate legal requirements into their day-to-day sales, purchasing, logistics, and finance processes.

All for One successfully completed an e-invoicing project for a Belgian company that is part of an international group providing solutions for the steel and foundry industries. The solution went live on January 1, 2026, on the SAP ECC system.

The project was implemented in accordance with Belgian requirements for mandatory B2B e-invoicing based on the Peppol network. For manufacturing companies, particularly those operating within international structures, this implementation enables them to comply with legal obligations and helps streamline document exchange processes with business partners.

E-invoicing in a complex manufacturing environment

The steel and foundry industries often operate within complex supply chains, involving a large number of commercial documents, attachments, confirmations, and logistics data. Therefore, an e-invoicing solution must be seamlessly integrated with the ERP system and well-embedded in the day-to-day operations of finance departments.

As part of the All for One project, the company implemented processing of outgoing and incoming documents directly within the SAP environment. Communication is based on the All for One E-Invoice HUB and a certified Access Point, which enables the secure exchange of documents over the Peppol network.

The scope of the implementation included, among other things:

• processing outgoing and incoming invoices in SAP,
• integration via the All for One E-Invoice HUB,
• the exchange of documents via a certified Peppol Access Point,
• forwarding incoming documents to the ReadSoft OCR system,
• support for business attachments in XML format,
• monitoring statuses and messages related to the exchange of e-invoices.

Automation of Incoming Documents

A key element of the project was the automation of the process for incoming documents. Invoices received via Peppol can be forwarded for further processing, including OCR tools and document matching mechanisms. As a result, e-invoicing does not end with the mere receipt of an invoice, but becomes part of a broader, integrated financial process.

From KSeF to Peppol

The project in Belgium is a natural extension of the experience All for One has gained through B2G e-invoicing implementations in Poland. Our solution All for One KSeF is used by over 120 companies for the mandatory integration of SAP with the Ministry of Finance’s National E-Invoice System. This same development path now supports clients who need to adapt their SAP systems to meet local requirements in other countries.

The implementation at a Belgian provider of specialized solutions for the steel industry, foundries, and high-temperature processes confirms that All for One E-Invoice HUB can support both integration with public administration platforms and B2B document exchange via Peppol.

For companies operating internationally, this is a key consideration: compliance with e-invoicing regulations requires not only knowledge of local regulations, but also practical experience in SAP integration, financial data management, and the design of robust business processes.