Most night trains need a supplement. But do we have to pay a reservation fees on top of that?!
I will be taking a CNL train from Vienna to Amsterdam. Because it is a popular service, I will probably reserve it as soon as I arrive in Europe - 4 weeks before the CNL train. The supplement cost for a seat on the train, I think, is 9Euro (from another website here).
So, when I reserve the ticket, what does it mean? Will I pay the 9euro supplement then, and have a guaranteed seat on the train and have to pay nothing more? Or would there be a reservation fees (3/4 euro) AND the supplement fees?
UPDATE - reservation information
Eurail: https://en.rail.cc/eurail-reser ... ement.html
Single train tickets: https://en.rail.cc/train-ticket ... ments.html