Here's my recent experience w/SW- I had "unused travel funds" that were supposed to be used within one year of the orig. purchase date which would have been Oct 15, 2005 but we are not travelling again until Jan. 2006. I called/wrote SW customer service a letter stating that I had unused funds that I needed to use for Jan 2006 and they responded by sending vouchers for the unused funds that will expire in Apr. 2006. The only problem is that vouchers cannot be used to purchase internet airfares. So I called SW customer service again & explained situation & they told me to book the flights on the internet, pay the full price with my cc, then once the travel has been completed in Jan 2006 to mail the vouchers (via registered mail) along with my completed itinerary to the CS dept. & they would then credit the amount of my vouchers back to my credit card....its been really confusing..I hope it works. Good luck to you!