Check your email and show them that confirmation at the window
If somebody else has that seat number on there ticket and your at wrong seat or Visa versa they would have to move to correct seat
Comes to your smart phone
When you buy tickets online, you are picking up your seats...at the end you receive a confirmation...that's enough for them. So just show them the confirmation and they'll just print your tickets out.
They do trust you to sit in the correct seats. But if there is any confusion or a seat mixup, they will have you all bring up your email or text from buying the seats to make sure everyone is sitting where they should be. We've had once or twice where others were in the wrong seats and it is always (in my experience at least) resolved amicably
I think they trust people to sit in the right seats, and wait for a fight to break out of they don't.
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