Jens Heise

You are correct that the element is optional for the normal ZUGFeRD profiles (Basic, EN16931, Comfort,...). But from the output you attached it seems you are using the XRechnung reference...

If you look at the output closely, you will notice that this it not reported as error, but just a notice which will not report the document as invalid. This...

Hehe. I had that myself the first time I tried running the validator on one of my generated files, but noticed that the summary status at the very end of...

Same problem for me. I generated a PDF/A-3b document with GhostScript which is reported as valid by ZUV / VeraPDF and pdf-online.com but rejected by the library. As for andrm...