if you have bought a ticket via e-bay and want to go inside the stadion, you must be able to say:
- who gave you the ticket
- how did you get it (better you do not say via e-bay
)
- where you got it (the place);
it think it would be the best that the one who sold you the tickets writes a letter that he sold you the ticket for the price that is written on the ticket. then it should not be a problem.