Got nicked again for someone else's tolls for a rental on the same day as mine. PlatePass charged me for driving one way from NYC to Baltimore via Staten Island and the NJ Expressway. I called ATS but unlike before, the agent wasn't willing to waive the charges on the spot. I asked about an email dispute process and was given an email, which I have added as a wikipost to this thread. In my email, I attached a copy of my completed reservation and my statement from my personal EZ-Pass transponder showing I paid for tolls on the day in question. I think the main thing that helped was that my completed rental agreement showed I drove 74 miles and NYC to Baltimore is about 190 miles.

I was told it would take up to five business days for a response, but I received an email confirming the reversal of charges less than 24 hours later.