German invoice templates, XRechnung/ZUGFeRD validators and VAT ID checks.
Open Document StudioGerman B2B and public-sector invoicing has strict format rules. Tentaco invoice hub bundles EN 16931 templates, KoSIT-aligned validation and Leitweg-ID checks — prep before portal submission.
Not tax advice — verify with your Steuerberater for edge cases.
Germany phases B2B e-invoicing — structured formats increasingly required.
Use validated XML/PDF — DATEV import depends on your setup.
Starting points only — legal review recommended.