My friend my sister, if you choose to escape from an unhealthy relationship or simply if you start your working life, here is how to open a bank account. You need to bring:
1. your passport,
2. a proof of income and
3. a proof of address.
Moreover, bankers have the legal obligation to know their customers. Consequently, they may inquire about your work or family status. He is not nosy. It is a requirement to protect the banking and financial system from money-laundering and terrorism funding.