The telephone rings at work.
"Hello, Mr Valladares, I'm calling from X (a financial institution). I'd like to talk to you about your account."
"Right, fine, what do you want?"
"First, Mr Valladares, we need to carry out a security check. Can you provide me with the first line of your address, your postcode and your date of birth?"
"Why not, Mr Valladares?"
"Because you repeatedly tell me that I shouldn't give out that sort of information. So, why are you calling me?"
"I'm sorry, Mr Valladares, but I can't give you that information until we complete the security check. I fully understand why you don't want to give you the information though. Can you call us to discuss the matter?"
"I'm sorry, I can't tell you until we..."
"Yes, I know, but if I don't know why I'm calling you, why should I?"
"Because we need to talk to you about your account."
"But you won't tell me why?"
"No, I'm afraid I can't. Please call us when you have an opportunity."
Sometimes, you just despair, really you do...