The right question is whether a guy who is over a decade out needs to do so, as the degree is not evidence of competence when it's been that long.
Of course it's possible they went with getting paperwork rather than using the interview as an opportunity to ask relevant questions. Interviewing is hard.
That's what they did, so why are you complaining? (Note that these documents are called Zeugnis in German, which translates to certificate, so maybe something got lost in translation if you think your university certificates are the wrong documents.)
I also disagree that an academic title earned 10 years ago is irrelevant. Having graduated with good grades from a top school signals a lot, even if it's been a while ago.
The right question is whether a guy who is over a decade out needs to do so, as the degree is not evidence of competence when it's been that long.
Of course it's possible they went with getting paperwork rather than using the interview as an opportunity to ask relevant questions. Interviewing is hard.