My issue was caused by booking a flight, then realizing within 24 hours that I would prefer a different return flight time. There was no way to change without the $150 penalty, but cancel/rebook was an option. Unfortunately, the cancellation credit was in the form of a new travel cert when I would have preferred it be returned to the "original form of payment", which was a much larger travel cert. Now I am left with two travel certs that will be harder to fully utilize the value without combining too much of my own $. Oh well, I guess I could have worse problems and not have any vouchers at all!