Can confirm. I usually do a decent amount of research about public transport in our travel destinations, so I more or less know what type of tickets or passes

Can confirm. I usually do a decent amount of research about public transport in our travel destinations, so I more or less know what type of tickets or passes I'll be buying ahead of time. But, last fall a flight cancellation left us with an unexpected day in Amsterdam. I guided our family through immigration and customs after an overnight flight from Canada, and then purchased what I thought were the correct tickets for our train ride from the airport to downtown. When we went past a card reader, it didn't seem to work, but there were no turnstiles and we were able to board our train. There were however turnstiles when we got off at the station downtown, and they wouldn't let us through. I walked over to an attendant at a podium, who looked at our (incorrect) tickets, our obviously sleep deprived selves and children and just laughed, told us we'd bought the wrong tickets, and let us through. I always imagined the world of high-stakes metro-related international criminality would come with more consequences than being good-naturedly laughed at by a Nederlandse Spoorwegen employee.