On 15 October 2025, the German Federal Ministry of Finance published another official letter on the obligatory use of electronic invoices for domestic B2B supplies. Contrary to some expectations, the Federal Ministry continues to emphasize the importance of invoice validation. In the Federal Ministry’s view, only those who check their e-invoices with a suitable validation application can avoid any risk to input VAT deduction. KMLZ supports you in checking and certifying your validation application if required. The Federal Ministry’s letter also includes further clarifications on obligatory invoice elements and corrections of e-invoices. You can find more details in our current newsletter.