Pan-European Public Procurement Online. A global network and set of standards for exchanging electronic business documents — primarily invoices — between organizations and governments.

A certified service that sends and receives Peppol documents on behalf of participants. Handles security, certificate management, and routing to and from other Access Points.

The governing bodies responsible for the Peppol network at international and country level.

A directory that tells the network which document types a participant supports and which Access Point to use — the phone book for Peppol. Participants register their endpoints here.

A central DNS-based lookup service that points to the correct SMP for a given participant. Customers do not interact with the SML directly — only Access Points do.

A logical destination defined by the Peppol Participant ID combined with a specific Document Type ID. Each endpoint tells the network exactly where to deliver a particular document type.

Peppol standards that define which data fields are mandatory, the applicable business rules, and the validation logic that every compliant document must pass.

The XML syntax used by most Peppol documents. UBL defines the structural format — the tags, fields, and hierarchy — while Peppol BIS defines the rules applied to that structure.

The transport protocol used by Peppol for all document exchange. Includes encryption, digital signatures, and reliable delivery confirmation between Access Points.

Identifies the specific document being sent. Used in routing and validation to ensure the correct rules and schema are applied.

Specifies the Peppol profile and version being used. Critical for correct validation — mismatched Customization IDs are a common source of processing errors.

Both the sending and receiving parties must be registered Peppol participants using certified Access Points. A business cannot send or receive Peppol documents without an Access Point.

The process of checking a document against the XML schema, Peppol BIS business rules, and any country-specific requirements before delivery. Documents that fail validation are rejected before transmission.