Peppol Access Point

Send and receive documents through the Peppol network

I am a...

• 📋 Business user learning about Peppol
• 👩‍💻 Developer ready to integrate
• 🤔 Decision maker evaluating our service
• 🏛️ Learning about mandatory e-invoicing requirements

---

Our Peppol Service

What We Provide vs. What We Don't

Service Overview

• API-Only Service: We provide programmatic access to the Peppol network - no web dashboard
• Document Format: We accept only UBL v2.1 XML files conformant to OpenPeppol BIS Billing v3 ruleset
• No Transformation: We don't convert files between formats - your documents must be Peppol-ready
• Webhook Delivery: All inbound documents are delivered via webhooks (no polling endpoints)

Why These Restrictions Benefit You

🔄 Vendor Independence
By restricting to only UBL 2.1 and OpenPeppol BIS Billing 3.0, a large part of the business process (i.e. generating the invoices) remains your responsibility. This makes it easier for you to switch access points without being locked into proprietary formats or processes.

📋 Compliance & Control
These standardized documents are exactly what you need to present to authorities for mandatory e-invoicing. It's beneficial that you create and store them yourself, rather than having them potentially locked inside a platform where you might lose control or access.

⚡ Simplified Integration
Our focused approach means cleaner APIs, predictable behavior, and fewer edge cases to handle in your integration.

Access & Pricing

Ready to get started? Contact our sales team to become a Peppol integrator.

---

What is Peppol ?

Peppol enables participants to exchange standards-based electronic documents over the Peppol network. A general business overview of Peppol is available in this blog post.

Traditional document exchange services are provided by integrators that will send the document based on specific and expensive to operate point-to-point connections. Peppol is based on a 4 corner model where the sender has a sending access point and the receiver has a receiving access point. The communication between the sender and the receiver is governed by Peppol standards which removes the cost of the point-to-point connections. This way, everyone can be connected to everyone and all the participants can choose a commodity access point.

Peppol is in use in 32 countries in Europe plus Canada, Singapore and USA with Peppol Authorities placed in 12 countries.

Peppol is based on three major pillars:

• the network (Peppol eDelivery Network)
• the document specifications (Peppol Business Interoperability Specifications also called Peppol BIS)
• the legal framework that defines the network governance (Peppol Transport Infrastructure Agreements also called the Peppol TIA)

Digiteal is a Peppol Access Point certified by the Belgian Peppol Authority, operated by the Belgian government. The Belgian Peppol Authority manages the list of all their certified Peppol Access Points.

Peppol is often used for e-invoicing. The whole process from the invoice preparation to its full payment by the recipient is explained in this video (see also the French and Dutch versions).

For more information about Peppol, the country profiles and the access points can be found on the official Peppol website.

---

Mandatory e-invoicing

Belgium

In Belgium, B2G e-invoicing is mandatory in Flanders since 2020. This has been extended to the whole country in 2022 and is enforced through the call for tenders issued by the public authorities. Since March 2024, all public procurement contracts for a total amount of minimum 3K€ must include the mention that the related invoices must be sent to the public institution through Peppol.

B2B invoicing through Peppol will become mandatory for all companies on 01/01/2026 (see decision on 29/09/2023 and the decree approved on 01/02/2024 in the Parliament. This concerns all Belgian VAT registered companies for all their invoices and credit notes sent to other Belgian VAT registered companies (see the details of the B2B obligation. Belgium has decided to take a staged approach. The next steps will probably be e-reporting (scheduled in the governemental agreement for 2028) and then the CTC as mandated by the European Commission.

Luxembourg

In Luxembourg, B2G e-invoicing through Peppol is mandatory as stated in the law of 13/12/2021. This obligation has been enforced gradually to all companies. The last step of the obligation for the small companies had 18/03/2023 as deadline.

There is no obligation yet for B2B eInvoicing but it is however encouraged.

France

In France, B2G e-invoicing is already applicable in France through the Chorus Pro portal. UBL, FactureX and CENBII can be used as exchange format. Chorus Pro provides the necessary gateway to interface the French System with Peppol. This integration is however performed in a way that does not respect the Peppol approach. The French administrations are not present in the Peppol registry and they are only addressed through the Chorus Pro endpoint acting as a black-box.

B2B e-invoicing was made mandatory in the article 26 of the finance law revision of 2022. However, the initial timing of the obligations was too ambitious and the obligations have been delayed on 28/07/2023. The current calendar for the application of these obligations is:

In Digiteal, we believe that the French specific system is too ambitious and not standard enough to succeed. We are not registered as a PDP candidate as

Of course, the companies can choose to start receiving and sending electronic invoices sooner if they want. They can also be directly connected through Peppol for maximum interoperability.

EU Countries

An overview of the e-invoicing obligations in all the EU countries is provided in the e-invoicing documentation of the European Commission.

In an EU Commission update, the EC pushes to set up a standard for reporting and mandate obligatory eInvoicing to improve VAT collection and transparency in the EU. They call this the Digital Reporting Requirements which is a type of federated Continuous Tax Control (CTC) for the EU Digital Single Market. This initiative is called ViDA (VAT in the Digital Age).

This involves all the EU countries (not only the ones that use PEPPOL today) and leads to a higher requirement for interoperability. For example, France must also comply with this through more interoperability with Peppol as described in this [update of the French DCTCE](https://openpeppol.atlassian.net/wiki/download/attachments/2963570689/2022.11.03%20F2F_DCTCE%20-%20France%20PoC,%20followed%20by%20CTC%20Q%26A.pdf?api=v2. All countries of the EU must support interoperable cross-border e-reporting by 2030 (except Italy that has until 2035 to comply because they already had a running clearing system before ViDA was decided upon). This will lead to a much wider adoption of Peppol as the perfect solution to support this interoperability and the Decentralized Continutous Tax Control (D-CTC) enabling e-reporting for the whole European Union.

---

Technical Integration

Getting Started with the API

Whether you are an ERP, CRM, an accounting package or a company wishing to send/receive invoices from/to Peppol; in order to send or receive invoices through the Digiteal Access Point, you must be granted the role of Peppol integrator within Digiteal. To become Peppol integrator contact the Digiteal's sales team.

Understanding the Document Flow

Outbound Documents (Sending)

1. You send UBL 2.1 XML to our API
2. We validate and deliver to the recipient's access point
3. You receive delivery confirmations via webhooks

Inbound Documents (Receiving)

You will receive inbound documents via webhooks (url or email)

❗️

We don't provide polling endpoints. All received documents are delivered via webhooks. See the Receive a Document section

Peppol identifiers

To identify participants in the Peppol network, identifiers are used. The identifiers are composed of an identifier type and an identifier value.
They are assembled as {type}:{value}. For example, type 0208 corresponds to the company number in Belgium and type 9925 corresponds to a Belgian VAT number. The Peppol identifiers of Digiteal using these types are therefore 0208:0630675588 and 9925:be0630675588.

The list of all the identifier types that can be used is available in the Peppol codelists.

When registering a company and to ensure maximum reachability, it is better to register the company for all the possible company identifiers associated to it. For example, in Belgium, the mandatory identifier type is 0208. So, when registering a company, we advise you to register for both the 0208 and the 9925 types.

Often, you will want to derive the various PEPPOL identifiers from a company VAT number. Here is a little recipe that will enable you to do this:

Address Registry and Peppol directory

The entities that are able to receive documents from the Peppol network are called Peppol participants. They are registered in a technical address registry called the SML (in PROD) and the SMK (in TEST). They operate through a DNS as explained here.

These registries redirect to SMPs that define the capabilities of each Peppol participant. To browse this technical registry manually, please use the participant query tool provided by Philip Helger.

There is also a Peppol directory that enables the general public to find the capabilities of the Peppol participants and their contact information.

To find if a company is able to receive a specific document type, you can call Digiteal API Get supported document types. This endpoint will read the address registry and provide you the list of document types supported by the company.

Integration Architecture

SaaS Integration

Integrating Peppol APIs of Digiteal from a SaaS solution is straightforward:

• The Sender using your SaaS solution wishes to send a document through Peppol. You can directly use the API to send it.
• You received a document for one your registered participant. You can inform your customer that will see the document from your Saas solution.

On-Premises Integration

Integrating Peppol APIs of Digiteal from an on-premises solution requires a gateway layer for the following reasons:

• The on-premises Sender software might not be up-to-date and it might not be sending valid Peppol documents. The Sender Peppol Integrator Gateway can fix the outgoing documents so that they can be valid according to the latest specifications.
• The on-premises Sender software cannot contain the credentials of the Integrator that are used to connect to the Digiteal Peppol Access Point.
• All documents sent to the Integrator, for all the registered participants, will be sent through webhooks to a single URL. This reception service will be part of the Receiver Peppol Integrator Gateway. The documents will then be forwarded to the on-premises Receiver software.

---

Document types

The lingua franca on Peppol is UBL. The documents exchanged on Peppol include credit notes, orders, advance shipping notes, invoices, catalogues, message level responses, etc.

Digiteal supports the following document types:

These documents are part of the the Peppol BIS Billing process and are described in the Peppol official documentation.

There are also technical messages exchanged:

• DeliveryNonDelivery (Transport ACK) (xsd, example): This document contains the proof that the document was delivered to the recipient access point. The document is signed by Digiteal. It contains a base64 encoded receipt from the receiving access point in DeliveryNonDeliveryToRecipient/Extensions/Extension/PeppolRemExtension/OriginalReceipt that is signed by the receiving access point. The base64 encoded X509 certificate of the receiving access point is in the Envelope/Header/Security/BinarySecurityToken of this receipt.

UBL invoice generation

The most important document to be able to generate and understand is the invoice. In order to streamline the implementation of the UBL invoice generation in your application, here are very basic recipes that will show you how easily it can be done:

Two of the most complicated aspect of the UBL Invoice document concerns

• the VAT with the different rates and exemption regimes. Here are some examples of the most common VAT use cases:

• the discount (Escompte). It can be a conditional discount as payment means info or a definitive discount :

Mandatory Fields in in Peppol BIS Billing V3

Peppol BIS Billing 3.0 mandates specific fields for invoices and credit notes. These include essential details like the invoice number (cbc:ID), issue date (cbc:IssueDate), invoice type code (cbc:InvoiceTypeCode), and details about the supplier and customer (cac:AccountingSupplierParty, cac:AccountingCustomerParty). Additionally, information about items, prices, taxes, and payment details are also mandatory.
Mandatory Fields in Peppol BIS Billing 3.0 are:

• Documents Identifiers
  • cbc:CustomizationID
  • cbc:ProfileID
  • cbc:ID (invoice number)
  • cbc:IssueDate
  • cbc:InvoiceTypeCode (from allowed UN/CEFACT subset)
• Parties / Identifiers
  • cac:AccountingSupplierParty / cac:AccountingCustomerParty
  • cbc:EndpointID with valid schemeID (electronic address)
  • cac:PartyIdentification/cbc:ID
  • cac:PartyLegalEntity/cbc:CompanyID (legal registration)
• Invoice Lines
  • For each <cac:InvoiceLine>:
  • cbc:ID
  • cbc:InvoicedQuantity
  • cbc:LineExtensionAmount
  • cac:Price/cbc:PriceAmount
  • cac:TaxTotal/cac:TaxSubtotal:
  • cbc:TaxableAmount, cbc:TaxAmount, cac:TaxCategory/cbc:Percent, cbc:TaxCategoryCode
• Totals
  • In document level <cac:TaxTotal> and <cbc:PayableAmount> and related totals with two decimals and proper currencyID

Important Considerations:

• Document Level Information : The invoice must include information like the invoice period (start and end dates), and relevant codes like the invoice type code and currency code.
• Consistency : All currencyID attributes should have the same value as the invoice currency code.
• No Empty Elements : The invoice document should not contain empty elements.
• Valid Format : Specific identifiers (like VAT numbers, organization numbers) must adhere to the correct format.
• Conditional Fields :Certain fields are mandatory based on the specific business case, such as allowance/charge information if applicable.

---

Manage participants

Register a participant

As a Peppol integrator within Digiteal you can send and receive documents for a company. For that you must first register the company as a participant in Digiteal and the Peppol network.
You can get the registration details of one of the companies that you registered using the get participant endpoint.

There are various reasons to register a participant:

• Send document only: In that case, set the "limitedToOutboundTraffic" property to true. You will not receive any documents for this participant. Multiple integrators can send documents for the same participant in Peppol.
• Receive (and optionally send): Only a single access point and a single integrator can receive documents through Peppol for any given participant. This means that if the participant is already registered to another Peppol Access Point or if it is already set to receive documents through another Digiteal Peppol integrator, it must first unregister from that third-party before you will be able to register the participant yourself. You will get the folowing errors when this happens:

Error codes

Register for specific document types

You can choose which document types you wish to receive through Peppol per participant. In the registration call, you can define this in the supportedDocumentTypes. By default, if you did not set "limitedToOutboundTraffic" to true, we will register the participant to receive INVOICE and CREDIT_NOTE.

Automatic registration in the Peppol directory

Digiteal registers all participants in the PEPPOL SMP and directory if their name is provided to define which are the technical capabilities and the associated Peppol Access Points of the participants. This is enough for the participants to receive messages from Peppol.

Extra elements can also be added to complete the registration in the Peppol directory:

• name
• countryCode
• website
• contactPerson (firstName, lastName, email, phoneNumber, language)
• additionalInformation (ex: "pdf included with the xml would be appreciated")
  We advise you to include those optional fields to provide more visibility to your customers in the Peppol directory.

❗️

Starting on April 30th 2023, the name and country code of the participant will become a required information to further improve the quality of the service we provide.

📘

You can register a participant to only send documents through Peppol by using limitedToOutboundTraffic. You will not be able to receive documents for that participant and the participant will not be registered in the Peppol directory.

Get a participant details

You can get the list of all the participants you registered using the get participants endpoint.
You can get the registration details of one of those participants using the get participant endpoint.

Modify registered document types

You can modify the document types of a registered participant using the add document type endpoint and the remove document type endpoint.
This is the recommended way instead of uregister/register participant to avoid any downtime of the Peppol service for the Participant.

Unregister a participant

You must unregister a participant if you wish to stop sending documents or receiving documents for a company.

Send a document

In order to send a document, you must first register the sender and the recipient must be registered to receive that type of document through Peppol.

You can send a document either just by providing the UBL (recommended) or by providing the full Peppol message document envelope (SBDH).

Generation of headers: If you send the SBDH, we will however re-create it based on the embedded UBL to make sure that it is compliant. Indeed, new versions of the standard lead to changes in the header and as certified Access Point Digiteal needs to send compliant messages (including the headers) over the network. If we notice discrepancies between the data that was provided in the header you sent and the header that we deduced from the UBL, we will contact you to sort this out. We recommend that you use the UBL sending so that all of this is handled automatically.

SDBH message identifier: The sending of the UBL also enables you to define the ID of the message that will be added in the SBDH's InstanceIdentifier. If it is not defined, the identifier of the UBL document will be used. This identifier will be used in the following document fields:

• DeliveryNonDelivery: DeliveryNonDelivery/SenderMessageDetails/UAMessageIdentifier
• MLR & Invoice Response: ApplicationResponse/DocumentResponse/DocumentReference/ID

Document sending is performed synchronously which means that when Digiteal will respond to your call, the document will have been successfully sent to the recipient's access point.

Webhook Notifications for Sent Documents

You can subscribe to webhooks to be notified of document delivery status:

📘

PEPPOL_TRANSPORT_ACK_RECEIVED

The payload document is a Transport ACK containing the confirmation of receipt signed by the receiving access point.

📘

PEPPOL_MLR_RECEIVED

The payload document is an MLR provided by the access point or the receiver based on technical validations.

📘

PEPPOL_INVOICE_RESPONSE_RECEIVED

The payload document is an Invoice Response provided by the receiver based on business validations.

Webhook payloads are defined in the callback section of the send document endpoint.

Detailed overview of the sending process

The Peppol first approach

The best way to integrate Peppol is to use the Peppol first approach. The rationale behind this approach is that Peppol enables automatic exchange of documents and that this exchange is most profitable when a maximum of entities are participating, just like having a phone is more interesting if most people have one.

The principles of the Peppol first approach are very simple:

• Whenever you have a document to send that is part of an ordering process, first check if the recipient is registered in Peppol. Digiteal provides a free service to perform this check (see Get supported document types). Alternatively, you can do this by calling the Peppol directory. Be sure to check this using all the possible identifiers for the recipient. For exmple, in Belgium, use the company number (type 0208) and the Belgian VAT number (type 9925). The recipient might be registered in only one of those.
• If the recipient is in the registry and supports the type of document you wish to send him, you should send the document using Peppol since the fact that he is on the registry means that this is his preferred way of receiving this type of documents, even if you were previously using another delivery channel.
• If the recipient is not in the registry, you should use a fallback mechanism (email, paper mail,...) that relies on your own stored contact details to send documents to that recipient.

Document validation

The Peppol standard is constantly evolving, changes are documented in the Peppol Billing release notes.

As a certified Peppol Access Point, Digiteal must send validated documents to the network. Before enforcing a new version of the standard we will always give you some time to adapt and comply with the new rules.
When a new validation rule will be enforced, an email will be sent to all the Peppol integrators with a reference to the Peppol documentation detailing the update and the date of enforcement by Digiteal.

Here is the enforcing calendar of the latest validation rules by Digiteal:

To validate your documents, you can look at the online validation of Peppol BIS v3 document or you can include the Peppol BIS validation in your document preparation using for example the PHAX-PHIVE library.

Digiteal provides a webhook for you to get notified for all sent documents that do not comply with the latest warning validations. This allows you to be prepared and react before the rules is enforced in our API.

📘

PEPPOL_FUTURE_VALIDATION_FAILED

Contains the details of all the validation errors.

The webhook payload is defined in the callback section of the send document endpoint and contains details about the document's validation failure.

Receive a document

In order to receive a document, you must first register the receiver.

Important: We don't provide endpoints to fetch received documents. All documents are delivered via webhooks only.

You can subscribe to webhooks to be notified of newly received documents:

📘

Webhook types for received documents

PEPPOL_INVOICE_RECEIVED: The payload document is an Invoice.

PEPPOL_CREDIT_NOTE_RECEIVED: The payload document is a Credit Note.

SELF_BILLING_INVOICE_RECEIVED: The payload document is a Self Billing Invoice.

SELF_BILLING_CREDIT_NOTE_RECEIVED: The payload document is a Self Billing Credit Note.

In order to receive these documents you must also add these in the list of supported documents when registering a participant via the register participant endpoint.

Detailed overview of the reception process

Webhook Configuration

📘

Key Concept: Webhooks are how we deliver documents to you

Webhooks are user-defined HTTP callbacks. They are usually triggered by some event, such as: receiving a document, receiving a transport acknowledgement or being notified of a future validation error (more on this below).

Configuration Options

We have a dedicated section detailing the configuration of webhooks and a page elaborating what each webhook type does.

• Configuring webhooks
• Webhook types list

By default no webhook is configured and each Peppol webhook type can be configured with an email or an url. Below is a list of behaviors and use cases for each configuration type (none, email, url):

🔧 Default (No Configuration)

• Documents are sent to your integrator email
• Use for: Testing, small volume, getting started
• What happens: We email you the UBL document and a PDF if included in the XML (both in attachment)

📧 Email Delivery (mailto: prefix in URL)

• JSON request body sent via email
• Use for: Non-technical integration, debugging, manual processing
• What happens: You receive an email with the JSON payload for integration purposes

🔗 URL Endpoint (HTTP/HTTPS URL)

• POST request to your specified endpoint
• Use for: Automated processing, high volume, production systems
• What happens: We send a POST request with the document data to your server

---

What's Next

Check the reference of the Peppol access point API and how to generate a UBL invoice:
Access Point