What is the difference between a PDF invoice and an XRechnung?
A PDF shows the invoice to people. An XRechnung is an XML file under EN 16931 and the BR-DE rules that software processes without retyping. Public buyers usually require XRechnung; a PDF is not enough there. In German domestic B2B, a PDF has been an "other invoice" (sonstige Rechnung), not an e-invoice, since 2025.