here are quite a few tickets on craigslist. some are the non refundable/changeable tickets. i did the eurostar last year but cant remember how closely they check tickets to the passport name?? i was thinking of buying a ticket from someone and using it. anyone try this? how closely do they check the tickets? if i remember correctly, i put my ticket into a machine, it came out the other end then went to passport control. at this point i dont remember if they checked my ticket again?

thanks