flight credit post check in?

[CupCrusher40]

allowed or no?

[TheMiddleSeat]

You can cancel your flight, even after check-in, up to 10 minutes prior to scheduled departure time. 

--TheMiddleSeat

[dfwskier]

you take your flight and you get a flight credit 

do   not take your flight, and you do not get a flight credit

it is so very simple...