Regardless of payment method, you can always contest a parking violation. To schedule an appeal for a parking violation, please call 517-355-8440 to schedule an appointment. Appeals may also be submitted in writing or completed online. Please note that if you do not show for an appointment, or are late, then the parking violation will be upheld. If you receive a violation when you have parked using Spot On, you can access your parking history to show verification of payment.