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E-invoice formats: UBL, Peppol BIS, ZUGFeRD

Every e-invoice format carries a structured XML file, not just a PDF. Which format do you need, and how do you show a discount, a credit note or self-billing? These guides explain UBL and Peppol BIS Billing 3.0, ZUGFeRD, XRechnung and Factur-X, with XML examples you can copy.

6 guides in English. Also in

Formats and rules. Get every field and document type right.

In English5 guides

In other languages5 guides

Add Peppol to your software with one API.

Send and receive UBL documents over Peppol with a REST API and SDKs.