When a Penalty Charge Notice is issued, you must either :
let us know in writing why it should be cancelled (do this when you receive a Notice to Owner as below)
A 50 percent discount will be given if the charge is paid within 14 days.
If the charge is not paid, a Notice to Owner will be sent to the registered keeper of the vehicle asking for the full amount of the charge.
If you do nothing, a Charge Certificate will be sent and the charge increases by 50 percent.
If you receive a Charge Certificate you must pay the charge within 14 days. There is no right to appeal at this stage.
If you do not pay the charge, it is registered as a debt in the County Court and a court fee is added and a Notice of Debt Registration is sent.