I received a ‘payment overdue’ letter from SIP demanding payment of £115. This is the first letter I have received from them. At the time, the main road was blocked with other cars so I had to enter the car park to turn my car around. The letter states I was there for 1.5 hours which is nonsense. Can anyone advise me what to do here? A part of me wants to ignore them but the other part is urging me to request evidence and question when the notice to keeper was sent etc.