Question For European-City Bus Drivers

I’m a city bus driver in the US, and I’ve noticed that a lot of foreign passengers—mainly from European countries, often get confused about our tap payment system. They’ll ask me things like, ‘Do I just get off?’ or ‘I don’t have to tap my card again, Gettin off?’

I was wondering, in other countries do passengers have to tap both when getting on and off? Here in the US, they only need to tap once when boarding.