Originally Posted by
Porcepic
Contact them online and ask for the reimbursement, it should not be a difficult case as long as they don’t expect proofs that your son’s seat was changed (which I understand do not exist as it was done on board).
There might be a "proof" as the crew is changing seats allocation on their cabin pads when they reseat people. I am sure they did the change for an UM, as they need to know where the UM are seated.