What United is threatening to do is forward a clearly uncollectable debt to a collection agency. This is pretty much fraud at its finest - they know it's not supposed to be collectable. It doesn't matter if the collection agency comes after you - United is on the hook for having forwarded that debt in the first place.
Yes, in an ideal world, collection agencies would properly verify the debts they collect on, but they definitely can't be arsed to do that voluntarily without gov't regulation saying so (and this administration is unlikely to provide said regulation).
Yes, in an ideal world, collection agencies would properly verify the debts they collect on, but they definitely can't be arsed to do that voluntarily without gov't regulation saying so (and this administration is unlikely to provide said regulation).