I purchased train tickets from Barcelona to Bilbao and another from Bilbao to Madrid. I have the tickets now but I just remember that it did not ask me for my passport details. It only asked for credit card and my account has been charged. I am concern that the conductor may refuse my entry to the train if there is insufficient details. Should I be concerned or am I worried for no reasons? Do train conductors ask to verify passport details on ticket and the actual passport?