Yesterday night at the Recoletos RENFE station.
Me (after unsuccessfully trying to exit the station using my ticket): My ticket doesn't work. Can you replace it, please? Him (a RENFE employee, already famous for the following, but I never learn my lesson): (Inserting the ticket in some sophisticated machine and studying something on the computer screen for 2 minutes). You cannot travel on this ticket, you already took the train twice today. Of course, I know that, I was just trying to leave the station, but the gates didn't let me out. (Back to the screen, another 1 minute). The ticket is fine. No, I believe it's not, I tried three exit machines, the ticket didn't work. You cannot travel more than twice a day. I know that. Can you please change my ticket? I will need it tomorrow morning. No, the ticket is fine.
5 MINUTES, 15 nervous people behind me in a queue, me keeping the old ticket that is apparently fine.
Today in morning at the Recoletos RENFE station.
Me (after unsuccessfully trying to enter the station using my old ticket): My ticket doesn't work. Can you replace it, please? Him (another RENFE employee): Of course.