last year my sis threw her ticket away after her water bottle leaked in her backpack and she didn't tell my parents until the nite before the flight. anyways there wasn't enuf time to get a printout copy of the original ticket from the TA in YVR. we were told to buy a ticket @ the counter @ checkin. after we're bak in YVR to get a copy of the original ticket and i can't remember exactly what but something like get a replacement ticket of the original and refund the walkup ticket. anyways the whole process took 3 momths. it was 3 months before my mom's visa got credited the C$1700 for the one-way walkup Y ticket. 1 week's pretty fast !!