Re: Paranoia?
the bank would probably detect that and inform the police
If you don't admit to your true name, yes. But it is not against the law to go by any name you choose if there is no intent to deceive. So what happens should you go to a bank and say that you'd like to open a bank account in a fairly common name by which you wish to be known to strangers, while showing them your passport in your legal name as required by law? (I'm assuming it would be illegal for a bank to sell on the fact that you have an account "Sigourney Whatever known as Susan Smith")
Companies do this all the time: XYZ ltd. trading as "Whatever we want to trade as today".