How to Know if Your Customer is on Peppol: Quick Guide

Why verify if your customer is already on Peppol?

Belgium is making B2B electronic invoicing mandatory from 2026. To send a compliant invoice, your customer must be registered on the Peppol network or have access via a service provider. Verifying their presence helps you avoid rejections and ensures correct delivery.

Method 1: Ask your customer directly

The simplest way is to ask them if they are already registered on Peppol, as well as their Peppol identifier (Participant ID). If they use Peppol-certified software or a provider like Peppol Box, they can easily provide you with this information.

Method 2: Check via the Peppol directory

The public Peppol Directory allows you to search for certain registered companies, although registration is not mandatory. Address: https://directory.peppol.eu

You can search by:

• Company name
• VAT number
• Company number

⚠️ Warning: A company can be on Peppol even if it does not appear in the public directory.

Method 3: Use your Peppol solution

A specialized solution like Peppol Box allows you to automatically verify if your customer is reachable via Peppol, simply by entering their VAT number.

• Automatic search and validation
• Real-time verification of reception capabilities
• Integrated Peppol address book

Your customer doesn't appear? Here's why

1. They are on Peppol but not in the directory

Many companies are active on Peppol without being published in the directory. In this case, only a solution like Peppol Box or a direct request can confirm.

2. They are not yet registered

Remind them of the 2026 obligation and advise them to register on Peppol Box.

Peppol Box: the professional solution for managing your Peppol customers

No more tedious manual searches in Peppol directories! Peppol Box completely automates the verification and management of your customers on the Peppol network.

• Instant verification: Enter the VAT number, company name or other identifiers, Peppol Box automatically identifies if your customer is on Peppol
• Smart address book: All your Peppol customers registered and synchronized automatically
• One-click sending: Once your customer is verified, send your Peppol invoices directly from the interface
• Guaranteed compliance: Meet the Belgian 2026 obligation without technical effort
• Expert support: Our team accompanies you in your transition to electronic invoicing

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