I've long had an uneasy relationship with security questions. It's the National Bank's fault. I had a spot of trouble with them a few years ago when I telephoned its centralised helpline to discuss my banking affairs.
I gave them my name and the number of the account I wished to discuss. The weird thing was I failed the security questions they asked me. From memory the questions were: when did I open the account, what was the rough current balance, and what was the limit on my credit card. On two separate occasions I answered these questions as accurately as possible yet the operator refused to engage with me any further.
So I took the most sensible course of action I could think of: I wrote to my branch in Hastings asking them to write back advising the answers to the questions they were after so that in future I'd be able to furnish the requisite replies to the telephone operator. Well, that didn't work. The letter I received said that they wouldn't be telling me the answers to the security questions since then they wouldn't be security questions.
I disagreed with this stance for several reasons. Firstly, surely they'd be safe sending the answers in writing to the mailing address my bank statements had been going to for many years. Secondly, since they clearly held a false set of information about me and since this false set of information was my sole key to telephone interaction with the bank, surely they were logically obliged to divulge it to me. Thirdly, my understanding of the Privacy Act was that organisations are obliged to release the information they hold on a customer to the individual concerned.
There was a time when this set of circumstances would have propelled me into launching a mammoth battle. I'd have sought legal advice, had letters issued on my behalf and generally come out with all guns blazing. However at this stage I'd moved on from such a litigious approach and couldn't be bothered expending energy on trivialities of this nature. I simply accepted I wouldn't be getting telephone service from the bank again.