Fire away if I'm wrong but in most sanctions it used to be true that she cannot fall back if the tourney played in was a regional or national qualifier tourney and her team won the berth. Not all tourneys are qualifier tourneys. Oh, she would need to be on the roster when the team was awarded the berth. Huh? Yes, there's been ghost players appear in tourneys yet once a check was made after the event her name was never on the roster. As long as there are rules you'll find people trying to break them. Others just don't know the rules. It's been my experience to leave such matters alone and let those enpowered to enforce to handle it. Nobody ever gave me a badge and told me to police rosters at tournaments. If it's so blatantly wrong it'll be corrected in due time.
It's not a sin to be stupid, just unhandy.