Tell Hertz that you don't give them permission to reveal your name to the court or anyone else for that matter absent a proper subpoena by the court. I would call Hertz and find out why they think they would be financially responsible; they're not. No law requires a company or anyone else to disclose the identity of a driver. Moreover, the fact that you might have rented the car, and thus been on the agreement, does not mean you were the driver; do not admit to Hertz or anyone that you were the driver. Hertz likely received a mailed notice which is not a proper form of service. They, like you, should ignore the mailed notice unless they are properly served, like anyone else. If you end up in some way having to go to court, which you shouldn't unless you're legally and properly served, then you can worry about legal and factual defenses. Feel free to call. Good luck.