New Jersey has no-fault insurance. You should do everything through your insurance company. Very unlikely that he can sue for this, but ask the insurance company whether they will provide a lawyer if he does sue.
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When he sues you turn case over to your insurance company.
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In the event that the person files a lawsuit against you, I would immediately forward the Complaint to your insurance agent and/or insurance company directly. Your insurance company would then retain an attorney with no charge to you and the attorney would defend you in the court case. Best of luck to you.
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