I can understand ending the call if they start asking for personal information, but if you get a call from the bank to take you through a suspected fraud case t

I can understand ending the call if they start asking for personal information, but if you get a call from the bank to take you through a suspected fraud case then all they do is ask you some 'pick-the-odd-one-out' style questions to verify your identity. They then list all your transactions, including the fraudulent ones and ask if you recognise them. After that they cancel the account and start a new one.