When my bank called me, first off I noticed it was a local number with the appropriate prefix that the whole company pretty much solely possesses, which is a pretty good sign. Then they asked me to verify my security questions they had to make sure they were talking to me, the same ones that I set up to be asked in such a case. They never asked for account info, or SS#'s, etc. I would not have given them that type of info. In fact they did most of the info-giving as far as dates and amounts and merchants so that I could verify that I, indeed, made the charges myself.
You're right though, it would have been even better if I had requested a callback number, but as I said, the prefix was the same as all phone numbers within that financial company. Everyone in this town knows this because the bank owns the largest employer in the area that also share that same prefix. I don't believe it is available for anyone outside of the company.
Good advice though. :thumbsup: