Can a 17 year old have a lawsuit filed against them?

My Friend was in a car accident when he was 17 and the lady that was also involved has a lawsuit against him or so his insurance says is this possible and if so how can he have this taken care of quickly?
Update: i also forgot to add that its been two years since the accident and he is afriad that this being legal action agianst him will stop him being able to join the military
Update 2: and the insurence has already paid what the damages were she is trying to suit him for extra money
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