It will be at least another three years before the digital public transport card (ov-chipkaart) is the only form of payment allowed on trains, according to Dutch Rail.

The first trial with the card on trains will be in June but it will not become compulsory until passengers are totally happy with it, a spokesman for Dutch Rail told the media.
The original aim had been to introduce the card on trains, buses and trams throughout the country this month but privacy and security concerns have caused widespread delays.
From Thursday the card will be the only form of payment allowed on the Rotterdam metro with Amsterdam following in June.