During our 3-week trip this fall we are based in 3 cities to use as 'home bases' - Haarlem, Bruges (Belgium) and Leiden. So we have 2 days when we know we are traveling between new 'home base' locations. First from Haarlem to Bruges, Belgium. And second from Bruges to Leiden. I have the nsinternational app and know what travel itinerary we want based on times, type of trains and minimal changes. I prefer to reserve/book those before we leave for our trip. If we have the purchased ticket on my phone, do we scan something when we board the trains?
The reason I wanted to ask you about this is we have read about the 'tap to pay' system works within the Netherlands. I am confident all we need is our contactless credit card to board trains or buses when we decide to travel on a given day while we're staying in Haarlem or Leiden. It just occurred to me that if we buy the 2 tickets I mentioned above I wasn't sure how the process works.