Hi folks,
please allow me an addendum …
AFAIK a qualified digital signature for digital invoices (like simple pdf) is generally no longer required for business (and never was for private) customers. It was officially before but in the “wild” i havent seen any.
Maybe official bodies and authorities - if your customers - may need it or big business will ask for it. But i have not read anything about the need of a signature with e-invoice.
Best regards
Marcel Naranjo
www.dig-it.de