Hello, thanks for the data. They mentioned something like this to me on the SBB FB, that they allow up to three small errors on the ticket, and in my case, it is only one, the difference of the day in the date of birth, with the passport data. Now, I will use the saver day pass to travel from the airport to Zurich HB and other trips within Switzerland. What worries me is that since the trip from Zurich to Tirano is at 12:07 in second class, I will not find seats for the three of us, since there is no reservation as such at that time and date. The good thing is that you have reservations for the train from Chur to Tirano in second class on the Bernina. Really thank you for taking the time and answering.