Originally Posted by
Efrem
(One way they catch people who try this, not the only one, is to ask ticket holders questions whose answers they'd know if they're really the close personal friends of the ticket "donors" that they claim to be. You can defeat this by giving the ticket holder lots of personal information about yourself - address, names of spouse and children, approximate age, occupation, type of car, recent travel history and more. I wouldn't feel comfortable sharing all that with a total stranger.)
Is this a confirmed information or an educated guess? I would uncomfortable to disclose this information about my spouse (if questioned about a ticket redeemed from her account) as this is pretty much a privacy invasion.
I don't mind answering these questions for immigration/CBP officers but would cut short airline employees' attempts to get this info disclosed.