The key point.

However, I'm a bit curious how a location is responsible for so many unpaid parking tickets so as to have to charge a fee to recover those costs. Whoever was renting the vehicle at the time the ticket is issued should be responsible, so that person should be charged, and it's pretty clear-cut (match the timestamp on the ticket with the vehicle's records). The rental agency shouldn't have to eat parking ticket costs (unless it's uncollectable bad debt--a card that won't go through and a customer that can't be tracked, which for a small parking ticket, shouldn't be too often).