I am confused about this train ticket validation thing.
I have a ticket bought online for Termini to Florence SMN, so it is a printer paper ticket. Does it need validation before departure? How early or close to departure does it need to be validated? What color are machine to validate? (I have heard they range from yellow to green and white). Do the machine colors signify any difference ?
All machines can validate all types of tickets (paper print , metro, long distance), is this a correct assumption?
For the Roma Pass how to validate it for multiple use on buses and metro?
Thank you all in advance for your responses, I've been lurking this forum and learned so much from all of you!