You're not at fault in the accident so don't bother filing a claim with Chase. Report the accident to the HLE and put down the insurance information from the other person on the vehicle incident report. I would suggest reaching out to the person- at least they were nice enough to leave you a note. Also, make a copy of the note and keep it somewhere safe. There's no reason to try to hide this from Hertz, you're not at fault and everything should be paid for by the other person's insurance