Comical part about it is she might know who her cabbie is, but the cabbie probably doesn't know who owns the cab he's driving, nor whether it's properly maintained or insured, especially here in Melbourne
If you think I'm kidding, wait till you have a collision with a errant cab and see how far you get claiming on their insurance, or even finding out who the registered owner is. I speak here from hard won experience.
Or, next time you jump in a cab, ask your driver if he knows who the registered owner is.