14 days — informal challenge with discount preserved
From the date the PCN was served on the vehicle, you have 14 days to make an informal challenge and still be eligible for the 50% discount if your challenge is rejected. Most councils will pause the discount clock while they consider your representation.
28 days — formal representations after the Notice to Owner
If the informal challenge is rejected (or you skip straight to formal), the council issues a Notice to Owner (NTO) within 6 months. From the date the NTO is served, you have 28 days to make formal statutory representations under TMA 2004 section 73.
28 days — tribunal appeal after Notice of Rejection
If your formal representations are rejected, the council issues a Notice of Rejection. From its date you have 28 days to appeal to the Traffic Penalty Tribunal (or London Tribunals in London). After this deadline the council can issue a Charge Certificate and the right to appeal is gone.