Call from the Halifax today:
Call centre: I just want to ask you a few security questions, is that ok? What's your date of birth?
No, no that is not fucking ok. You called me. The onus is on you to prove who you are, not the other way around. If you're so confident that the number you have dialled is for me, you shouldn't be asking any questions - otherwise, don't call the fucking number. How moronic do you have to be to think it's acceptable to call someone demanding to know vital personal security details about them?