Peppol (Pan-European Public Procurement OnLine) is an international network for exchanging structured electronic invoices and other business documents. Instead of sending an invoice as a PDF attached to an email, it travels across Peppol as a machine-readable document — straight from your system into the buyer’s system, validated, signed and traceable.
For companies across Europe, Peppol is rapidly becoming mandatory rather than optional, driven by national mandates and the EU-wide ViDA (VAT in the Digital Age) framework — see Mandatory e-invoicing. This article explains what Peppol actually is and how it works under the hood.
The four-corner model — how an invoice travels
Peppol is built on the so-called four-corner model. Think of it as registered mail for invoices:
- Corner 1 — sender: you, or your accounting/ERP system, create the invoice.
- Corner 2 — your Access Point: a certified provider (such as Verteco) validates, signs and sends it into the network.
- Corner 3 — the buyer’s Access Point: receives the document and delivers it onward.
- Corner 4 — buyer: the invoice lands as structured data directly in their system.
You and the buyer each only talk to your own Access Point. You never have to worry about which software the other side runs — the network guarantees they understand each other. We cover what a Peppol Access Point is and how to choose one in a dedicated article.
Peppol BIS Billing 3.0 and EN 16931 — the language of an e-invoice
For systems across Europe to understand each other, an invoice needs a uniform structure. Peppol uses the Peppol BIS Billing 3.0 format, built on the UBL (Universal Business Language) standard and the European norm EN 16931. In practice, every field — VAT ID, date, amount, tax rate, IBAN — has a precisely defined place a machine reads without errors and without OCR.
A good Access Point validates every document against EN 16931 before it leaves, so formal errors are caught up front. More on the document itself in Electronic invoicing explained.
Peppol vs. a PDF invoice — the real difference
A PDF invoice is essentially a picture of text. For the buyer’s system to process it, a human has to retype it or rely on error-prone OCR. A structured Peppol invoice is a data document instead:
- No OCR or manual retyping — the data is read directly.
- No lost PDFs in an inbox — delivery is confirmed and traceable.
- Fewer errors and disputes — mandatory fields are validated before sending.
- Faster processing and payment — the invoice is in the buyer’s system within seconds.
Who needs Peppol
Practically every company that issues or receives B2B invoices, especially:
- suppliers to the public sector, which already requires e-invoicing,
- suppliers to large buyers (retail chains, OEMs, corporates) that mandate Peppol in contracts,
- e-shops and accounting firms with higher invoice volumes,
- and, as national mandates roll out, everyone else in scope.
How to connect to Peppol
Connecting is simpler than it sounds. With Verteco it works like this:
- Registration — we register your company as a Peppol participant in the central directory (SMP).
- Inbox or integration — you either use the web-based Peppol Box, or we connect your accounting/ERP system via REST API.
- Test and go live — we verify the invoice flow against a real Peppol endpoint and switch to production.
Verteco operates its own Slovak Peppol Access Point, certified by the Slovak Financial Administration (PA SK ID EFSK000031, seat PSK001128) — we are not a reseller. Receiving e-invoices is free forever. See the e-invoicing pricing or activate your free inbox right away.
