> (by the way, by the time you have checked in and your boarding pass has been issued, a lot of companies just don't allow you to cancel anymore, so it's really a non-issue?)
Which companies have a cancellation policy that is contingent upon getting a boarding pass? I've cancelled checked-in tickets before. If the flight is operated by a different airline than the ticket issuer, you just have to call the operating airline first to undo the check-in (a few airline can even do this online). After that it should be possible to cancel the ticket by the ticket issuer without any problems.
Which companies have a cancellation policy that is contingent upon getting a boarding pass? I've cancelled checked-in tickets before. If the flight is operated by a different airline than the ticket issuer, you just have to call the operating airline first to undo the check-in (a few airline can even do this online). After that it should be possible to cancel the ticket by the ticket issuer without any problems.