My buddy and I found a wallet in the back of a cab a few years ago..turned it over to the cab driver and his reaction was less than expected..no mention of it on the radio to the office,or telling us he will go back to his last drop-off..

Next time if I find a wallet,I will keep it myself and call any contact#'s I can and/or a CC card lost # and if no call back by the time I leave mail it back to the person.
I'd be freaking out and this experience has me remembering the cab company name and # and triple checking the back seat of every cab I take.