ZUGFeRD invoices

Julian R Yes, PDF/A would be a great first step, but ultimately I would still need to save the PDF/A and convert to ZUGFeRD somewhere else, which is a step that is not protocolled anywhere and potentially problematic with GoBD. If Cakedesk had ZUGFeRD I could directly BCC into an archive and it would never leave the system unprotocolled. And if it was changed after the fact, there would be an exact copy of how it left Cakedesk in my archive.