What is Peppol? A Guide to the Peppol Network

What is Peppol?

Peppol (Pan-European Public Procurement Online) is a global network for exchanging electronic business documents like invoices, orders, and credit notes. Originally launched in 2008 as an EU initiative to simplify cross-border public procurement, Peppol has grown far beyond its European roots.

Think of it as the postal service for e-invoices and other business documents: once you're connected, you can send documents to any other business on the network, regardless of their country or software.

Today, the Peppol network is governed by OpenPeppol, a non-profit international association based in Belgium. OpenPeppol works with 17 Peppol Authorities worldwide — government agencies or appointed organizations that manage Peppol adoption in their regions.

The network spans Europe, Singapore, Australia, Japan, New Zealand, Canada, and the USA, with new countries joining regularly. It supports both business-to-government (B2G) and business-to-business (B2B) document exchange.

Important to note: Peppol is not a platform or software — it's a set of open standards and specifications that define how documents should be formatted, transmitted, and discovered. This openness means any certified provider can participate, creating a competitive marketplace of service providers.

One connection, one format, reach everyone

The Problem: Traditional EDI

Before Peppol, sending electronic invoices was a nightmare. Each customer might require a different format: EDIFACT for one, UBL for another, proprietary XML for a third, or even just PDF via email.

The more customers you have, the more complex your setup becomes. This "spaghetti" of point-to-point connections is expensive to maintain and error-prone.

The Peppol Network: Four-Corner Model

Peppol uses a four-corner model where businesses don't connect directly to each other. Instead, they connect through certified intermediaries called Access Points that handle the routing, validation, and secure transmission of documents.

This architecture is what makes Peppol scalable. Rather than every business needing to establish direct connections with every trading partner (which would be thousands of integrations for large companies), each business only needs one connection to their Access Point. The Access Points handle all the complexity of routing documents to recipients anywhere on the network.

The four corners are:

• Corner 1 (C1) — The sender, the business sending the document
• Corner 2 (C2) — The sender's Access Point, a certified service provider
• Corner 3 (C3) — The receiver's Access Point, another certified provider
• Corner 4 (C4) — The receiver, the business receiving the document

How It Works

When you send an invoice, your ERP or accounting system sends it to your Access Point (C2). Your Access Point validates the document, looks up the recipient's Access Point using the Peppol discovery services (SML/SMP), and securely transmits it using the AS4 protocol. The receiving Access Point (C3) then delivers it to the recipient's system (C4).

Access Points must be certified by OpenPeppol and comply with strict security and reliability standards. This certification process ensures that every participant in the network can trust the infrastructure, regardless of which Access Point their trading partners use.

Document Standards & Validation

The Peppol network supports multiple document standards, giving participants flexibility to choose the specification that best fits their needs. All standards are based on UBL (Universal Business Language) XML, ensuring machine-readable, structured data. The two main standards you'll encounter are Peppol BIS and PINT.

Peppol BIS (Business Interoperability Specifications)

Peppol BIS is the established European standard, built on UBL and fully compliant with EN-16931, the European Norm for electronic invoicing. It's mandatory for EU public sector invoicing and widely adopted for B2B transactions across Europe. Peppol BIS also supports country-specific extensions (CIUS) that allow individual countries to add local requirements while maintaining cross-border compatibility.

PINT (Peppol International)

PINT is the newer global standard designed for worldwide interoperability. Also UBL-based, PINT is adapted for international use beyond EU-specific requirements. It has been adopted in Singapore, Australia, New Zealand, and Japan, with more countries joining. PINT enables true cross-border e-invoicing without the constraints of European regulations, making it ideal for global trade.

Automatic Validation

Before any document is sent, it's automatically checked for errors. Is the format correct? Are all required fields filled in? Do the numbers add up? If something's wrong, the document is rejected immediately with a clear error message — so you can fix it before it ever reaches your customer. This means no more back-and-forth about missing information or incorrectly formatted invoices.

Why This Matters

This strict validation means no surprises and no malformed data. When you receive a Peppol document, you can trust it contains all required fields in the expected format. Your accounting system can process it automatically without manual intervention.

Supported Document Types

The Peppol network supports a growing range of business documents:

• Invoices — Standard commercial invoices
• Credit Notes — Corrections and refunds
• Purchase Orders — Ordering documents
• Order Responses — Confirmations and modifications
• Catalogues — Product and price lists
• Despatch Advice — Shipping notifications

Your Place in the Peppol Network

So where do you fit in? Your business can be both a sender and a receiver. You send invoices to your customers and receive invoices from your suppliers.

The beauty of Peppol is that you only need one connection to your Access Point. Through the network, you can reach any number of trading partners — no matter how many customers or suppliers you have.

Practical Benefits

• Cost Savings — Electronic invoicing costs approximately €1-2 per invoice compared to €15+ for manual processing
• Faster Payments — Structured data enables automatic reconciliation, speeding up payment cycles
• Enhanced Security — Encrypted, authenticated transmission reduces fraud risk compared to email or post
• Single Integration — One connection replaces many point-to-point integrations

Use the controls below to see how your network scales. Notice that your ERP always has just one connection, while the Peppol network handles all the routing.

How Does Your Invoice Find Its Way?

You want to send an invoice to a company on the Peppol network. You have their Peppol ID (like 0192:123456789), but that's just an identifier — not an address. How does your Access Point figure out where to actually deliver the document?

Think of it like looking up a phone number. You know the person's name, but you need their actual number to call them. Peppol uses a two-step lookup — similar to finding the right phone book, then looking up the entry.

The Peppol Directory

The Peppol Directory is a public, searchable catalogue of Peppol participants. It provides a convenient way to find trading partners and verify their Peppol capabilities without needing their exact Peppol ID.

What You Can Search

• Company name — Find businesses by their registered name
• Peppol ID — Look up specific identifiers
• Country — Filter by geographic location

What You'll Find

• Peppol ID — The participant's unique identifier (e.g., 0192:123456789)
• Supported documents — Which document types they can receive
• Country — Where they're registered
• Registration info — When they joined the network

Official Resources

For authoritative information about Peppol, refer to these official sources:

• OpenPeppol

  The governing body and official Peppol organization

• Peppol Directory

  Official participant lookup service

• Peppol Documentation

  Technical specifications and implementation guides

• Certified Access Points

  Find certified Peppol service providers

Frequently Asked Questions