At MTRX we have personal tickets, which means that only the person whose name the booking is made in can travel on the ticket. We have ticketless travelers on board, which means that we do not have a ticket check, but if the personnel on board ask for identification then you must be able to show this. Because we have personal tickets this means that the ticket is not sold to another person either, and if you do not have valid identification, you are not considered to have a ticket either.
Do you travel with a discounted ticket such as a student or pension discount? Then the same rules apply here as well. Anyone traveling on a discounted ticket should also be able to show proof of this, such as student IDs or retirement certificates.
Accompanying children and single children under the age of 16 need not identify themselves, unless the child does not have to prove his or her age to travel on a discounted ticket.