Amanda Visell

A few times when
the fault is, alas, entirely yours.
Your driver’s license has expired. All adult passengers must have valid government-issued identification to board a plane. (A Social Security card qualifies if you have a second form of ID as well, but it’s not a good idea to carry yours with you, ever.)Your paperwork is not in order. Each country has its own specific entry requirements
(for example, South Africa insists that your passport have two blank facing pages). Always check these details with the appropriate consulate before traveling abroad.You didn’t verify the schedule. Tickets purchased far in advance may bear inaccurate departure times. Confirming correct times a day or so ahead is solely your responsibility.You’re a no-show. “Most airlines will reduce the value of your ticket to zero if you don’t cancel your reservation before departure time,” cautions Consumer Reports WebWatch columnist Bill McGee.