We traveled today from Orvieto to Firenze SMN. Two adults and two teens ages 16 and 14. I've been using the Trenit! app this far with great success.
I selected the cheapest fare with zero train changes. The app said to buy 3 adult and one child ticket, saying a child on this route is between 4 and 14. This was a Regionale Veloce train.
On board I was fined by the conductor since he said the cutoff age for a child ticket is 11 on this train. After reading the Trenitalia site, I'm honestly not sure who is right.
This site... https://www.trenitalia.com/it/html/trenitalia/Info_regionale.html
... Says the difference is between a regional and national train. Considering it has Regionale in the name, I'm thinking the conductor is right. But what makes up a national train? I argued with him that their own site says age 14 but to no avail. I had to pay the difference between the adult fare and an 8 euro fine. Pretty minimal.
But it's frustrating because just two days ago we were on the identical train from Rome to Orvieto and the conductor didn't say a thing to us.
I've emailed the app maker for help.
I'm not going to ruin my vacation over a miniscule fine but it's already frustrating buying train tickets and figuring all this out, thinking you've done all the research and did everything just right... Right tickets, correct validation, getting on the right train... And I still got it wrong. Very frustrating.
Thanks for any input!