[Hermel]

> The right way is to ask for the documents.

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.