Students are more likely than any other sort of train user to forget to check out using their public transport smart cards, a Dutch Rail (NS) spokesman told newspaper Spits on Friday.

Between 0.5% and 0.7% of daily commuters forget to check out, but 2% of less frequent travellers forget to do so, the spokesman said. And 4% of student users make the same mistake.
Students can choose between two sorts of cards – one offering free travel in the week and the other at weekends. When students use their cards outside these periods, they do have to pay, which means checking in and out. This is why so many forget.
People who forget to check out, pay a €10 charge and relatively few students remember to claim it back, the NS said.