Berlin advice

Didn't get done in Berlin but in Freiburg. oh the shame
As a foreigner, they wrote me up a fine, then as I had an Oz address, likelihood of actually paying was reduced so they take you over to the cash machine and make you withdraw the money. Who knows if they pocketed the cash but my "receipt" was very official.
I then expensed it... I confess >>>>>>>>>>>>>>>>>>>

That is an awful lot like being mugged. Surely they cannot do that? You could always deny you even had a card, or a bank account too.