E-Invoicing Resources
Browse practical resources for electronic invoicing, from compliance guidance to format comparisons and reference pages.
When to start here
Start here when you first need to decide whether the next step is format selection, country routing, validator triage, or ERP integration. This page is meant to shorten that decision, not just list documentation.
Choose your next path
Compliance Guides
Step-by-step guides to XRechnung, ZUGFeRD, and EU compliance requirements
Country Guides
Country-by-country basics: formats, routing, and recipient identifiers
XRechnung Field Guide
Complete reference for XRechnung fields, business terms, and requirements
Quick actions
Featured Resources
Compliance Guides
8+ StandardsStep-by-step guides to XRechnung, ZUGFeRD, and EU compliance requirements
EU E-Invoicing
4 GuidesLong-form guides for the largest EU markets and delivery models (PEPPOL, portals, clearance)
Country Guides
10+ CountriesCountry-by-country basics: formats, routing, and recipient identifiers
Glossary
40+ TermsClear definitions of e-invoicing terms, standards, and validation concepts
Code Lists
6+ ListsCommon code lists for e-invoices: VAT categories, payment means, units, and more
ZUGFeRD Profiles
5 ProfilesChoose the right ZUGFeRD/Factur-X profile, from MINIMUM to EXTENDED
XRechnung Field Guide
165+ FieldsComplete reference for XRechnung fields, business terms, and requirements
KOSIT Validator Errors
21+ ErrorsKoSIT validation errors and how to fix them
Tool Comparisons
2+ ComparisonsCompare Invoice-Converter with alternatives such as PDF24 and sevDesk
Trust & Security Center
Updated 2026Security, privacy, and data-handling details for Invoice-Converter.com
External API Documentation
V1 contractApproved-access API contract documentation for invoice automation teams, including decisions and onboarding checklist.
Recommended starting points
Use these shortcuts when you already know the task you need to finish this week.