E-Invoice Glossary
The complete reference for European e-invoicing terminology. From EN16931 business terms to country-specific identifiers.
Popular Terms
BT-1 Invoice Number
BT-1 is the unique identifier assigned by the seller to identify the invoice, required on every e-invoice.
BT-10 Buyer Reference
BT-10 is a text identifier assigned by the buyer that the seller must include on the invoice for routing or reference purposes.
Chorus Pro
Chorus Pro is France's government platform for receiving and processing B2G e-invoices, mandatory for all invoices to French public entities.
EN16931
EN16931 is the European standard for electronic invoicing that defines the semantic data model and business rules all compliant e-invoices must follow.
EndpointID
The EndpointID is a Peppol participant identifier that specifies where an e-invoice should be delivered on the Peppol network.
Factur-X
Factur-X is the French name for the ZUGFeRD hybrid e-invoice format that embeds structured XML inside a PDF, enabling both human and machine readability.
FatturaPA
FatturaPA is Italy's national e-invoice format required for all B2B and B2G invoicing through the SDI (Sistema di Interscambio) platform.
KSeF
KSeF (Krajowy System e-Faktur) is Poland's national e-invoice system that will become mandatory for all B2B invoicing in February 2026.
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