German: https://www.tagesschau.de/wirtschaft/verbraucher/iban-finanzamt-rueckzahlung-100.html

This is more like the 'fraud by the entire system'. In any case the money shouldn't reach to a different person.

I don't understand how do banks in Germany provided the same account number to another person.

Fantastic! All hail Germany!

So wtf does one need to provide recipient name beside IBAN?! I always thought apart for silly surveillance it's also in case of legal disputes (my intention was person X receives the money). Since obviously if IBAN can just be recycled it's not reliable for any practical use.

Bitcoin transfer cant be reversed too :)

A reversal can be as simple as an agreement that in certain situations that two banks will adjust their ledgers accordingly, regardless of what the settlement network will permit.

Bank transfers are reversible, just not by powerless individuals.

Yet, it's still a bank. Why trust third parties?