I have to use up a transportation voucher, so I put an itinerary on hold last night and called in this morning to purchase. AA took my credit card and voucher info, then gave me two options: 1. Go to the airport and see the ticketing office. 2. Mail it in. I have 12 days to complete the process (of sending the voucher or visiting the ticket office). This week will be a mess at the airport, and the office hours are annoying (they're closed 5-7pm every day?!?) so I am considering using the USPS to my advantage. Has anyone mailed in their vouchers? If so, how has it worked out?