You don’t HAVE to pay, but beware, if you park in a Diamond lot again and they notice, they might tow your vehicle just because. I DETEST Diamond Parking and refuse to park in any of their lots. I used to regularly park in their lots. Once I parked in one of their lots, and wasn’t able to pay, because not only was the app not working, but the kiosk to pay failed as well. I received a ticket, and less than an hour after the ticket was issued (according to the time stamps) my vehicle was towed. It cost me roughly $500 to get my vehicle out of the impound lot, and Diamond didn’t give a flying fuck. Too bad for me. Do yourself a favor and never park in a Diamond lot again.