Originally Posted by
tcook052
They most definitely can and as a TA I've sold tickets this way.
Originally Posted by
PbodyPhoto
That is absolutely not true in most cases. I have bought two seats on the same flight on several occasions and airlines. Never had an issue.
tcook052 already addressed that.
Thread about that in UA forum, possibly others.
IIRC it's GG EXTRASEAT for agents.