Knowledge base
Guides
Practical answers for formats, buyer references, rejected invoices and validation results.
Formats
Choose XRechnung or ZUGFeRDCompare structured XRechnung XML and hybrid ZUGFeRD / Factur-X PDF against the recipient’s requirements.XRechnungXRechnung 3.0.2 UBL generation and inspection; CII inspection only.ZUGFeRD / Factur-XFactur-X 1.09 EN16931 hybrid PDF with embedded CII XML. Required XML checks and independent final PDF/A-3b checks are separate.Peppol BIS documentsPeppol BIS 3.0.21 UBL generation and inspection. Creating a file does not register an endpoint or send or receive through the network.
Fixing findings
Buyer reference or Leitweg-ID?Understand BT-10, BR-DE-15 and when a customer-provided Leitweg-ID belongs in the buyer reference.Fix BR-DE-18 cash-discount termsUse the correct XRechnung SKONTO syntax, including decimal places and the required line ending.Invalid, partial or unsupported?Distinguish invalid invoices from incomplete checks and unsupported profiles before deciding what to fix.Why a PDF has no invoice XMLIdentify an ordinary PDF and ask for the structured original instead of treating a scan as an e-invoice.Valid invoice rejected by a portalInvestigate routing references, recipient requirements and submission evidence when a technically valid invoice is rejected.
More in the knowledge base
Documentation7How to use the FakturFokus workspace: set up your business, create and inspect invoices, and manage storage and billing.Blog4Clear explanations of German e-invoicing rules, deadlines and practical preparation for small businesses.Validation rules13EN 16931 and XRechnung rule codes with the affected field, an example correction and how to validate again.Sample tools3Try the validator and viewer on a fictional XRechnung without signing in.