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Integration Guide

FastBill GmbH

FastBill

Creating B2G invoices with FastBill? Validate your XRechnung exports to ensure compliance with German e-invoicing requirements.

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Supported E-Invoice Formats

FormatSupport Level
XRechnung 3.0Native Support
ZUGFeRD 2.1Native Support

Common Validation Errors

These errors are frequently encountered when validating e-invoices from FastBill. Click on any error to see the fix.

BR-DE-15Common

Buyer reference (Leitweg-ID) mandatory

Freelancer-focused UI may not prominently display B2G requirements like Leitweg-ID.

View fix
BR-DE-17Occasional

Seller contact information (name, phone, email) required in XRechnung

Simple setup may skip seller contact details required for XRechnung.

View fix

About FastBill

FastBill is online invoicing software for German freelancers and agencies. It supports XRechnung for B2G invoicing and ZUGFeRD as PDF export format.

Validate Your Invoice

Export your invoice from FastBill and validate it against Peppol and EN16931 rules.

Validate Free

How to Validate

  1. 1Export your invoice as UBL or XML from FastBill
  2. 2Upload the file to our validator
  3. 3Review errors and warnings with suggested fixes
  4. 4Fix issues in FastBill and re-export

Resources

Browse All ErrorsAPI DocumentationOther Software Guides