dear, dont be a fool, as simple as that. When i see the idiot driver switched on tariff 0 instead of tariff 1, or his meter has any sort of sticker hiding the numbers, or " isnt working", or there is a bottle of water next to it- i say nothing. At the end i ask for the receit- wrong tariff on the receit / no receit/ wrong amount = NO MONEY! its their company policy- read it
So in 9 cases of the 10 im getting around Doha for free))) Of course, if there is no bullshit around, no tricks- i always give that driver a good tip