Originally Posted by jimc_usa
What is the difference between a MCO and a ECV( which is what I got for a price change?) And do you always lose the difference if the ECV is larger than the ticket you are paying for?
An MCO is an ECV unless its a TCV (Electronic vs Paper) but an ECV does not have to be an MCO (it could be a bump voucher). Certain ECVs that are for fare changes (012028 ticket numbers) have no residual value and are only good for 1 ticket on 1 reservation in the same name as the person it was issued to. ECVs for other reasons like bumps (012027 ticket numbers) have a residual value after used and can be used for MANY tickets until it has no remaining value.
AND I should not know that much about ECVs but now I do and will never make that mistake again.