A paper ticket may show a fare much higher than what you actually paid, and not the airline's cheapest fare (or fare class in coach). This is to your advantage -- in case of overbooking you'll be more protected from getting "bumped."
Err, huh? Paper tickets practically always say the full price, this has nothing whatsoever to do with bumping. Involuntarily denied boarding (IDB) is extremely rare these days, demand management systems do a pretty good job and the airlines ask for — and get — volunteers for bumps, because it's easy money if you're not in a hurry. Jpatokal 12:37, 12 June 2006 (EDT)
I agree that getting involuntarily bumped is rare nowadays. However, most tickets from consolidators are in full-fare coach. The airline may sell (on its own) some discounted seats with lots of restrictions. If anyone gets bumped involuntarily, these people are the first to go. MMKK 21:54, 13 June 2006 (UTC)