I was on a flight last year (summer 2004) SFO YYZ that required a 2004 SSWU (expires Feb 28, 2005... I was already confirmed in C from a L fare). The flight was evenutally canceled and I was placed on a later flight and ended up with a ML*1 since it was now overbooked (due to the overflow from my canceled flight). I got my SSWU back but it had already been marked as "USED SFO" along with some other scribble by the agent. It's been sitting in my drawer for 6 months now... can I still use it? Can I still use it for another flight instead of out of SFO? Never thought of it until now as I just found it as I was cleaning...