bitcoin.de has some sort of cooperation with a German Bank:

https://blog.bitcoin.de/en/bitcoin-de-und-fidor-bank-ag-vere...

    As from the start of the cooperation, which will be
    activated upon the registration with the German Federal
    Financial Supervisory Authority, Bitcoin Deutschland GmbH
    will become Fidor Bank AG’s so-called “tied agent” to
    conduct the bitcoin trading for Fidor Bank AG on
    bitcoin.de.

That might help them with most of these things.