The machine or the app wasn't working
You tried to pay. The machine ate coins, rejected cards, or the app spun and crashed. When the operator's own equipment prevents payment, charging you for not paying turns their failure into your fine.
Phrases to look for on your letter: “no valid payment” · “failed to purchase parking time”
Why this is an appealable position
Where payment is made impossible by the operator's equipment, the contract is frustrated — you cannot be held to a term the operator made unperformable. Codes of practice expect operators to provide working payment means and to consider equipment-failure appeals on the facts. Contemporaneous evidence (a photo of the error screen, a call to the helpline number on the machine) usually decides these.
The clause to put in the letter
Name the paragraph, not just the rulebook. An operator answering "the Code requires a grace period" can wave it away; an operator answering its own clause number, quoted back at it, has to deal with what the clause says.
Code of Practice v1.1, Annex F, F.3(f): where one or more payment machines were out of operation, no alternative payment options were available (e.g. by phone) and the driver could not reasonably be expected to have accessed machines
(Appeals Charter, page 47 of 57; read at source 2026-09-05)
Your position is strongest when
- You photographed the error/out-of-order state
- You called the number on the machine or reported in-app
- No alternative payment method was available on site
Evidence to gather now
- Photo of machine screen/error at the time
- App error screenshot with timestamp
- Phone log of the helpline call
- Bank line showing an attempted/failed charge
Your first move
Appeal with the equipment evidence and ask the operator for its fault log for that machine on that date — they keep them, and silence speaks.
Not sure yet? Check whether you'll lose your discount first — free
Build my appeal letter, freeAnswer 8 questions about what happened and get a ready-to-send appeal letter in minutes. It costs nothing, and you can download it.
The one thing on this site you can pay for is one operator’s full POPLA record, £20 once: three years of that company’s appendix rows, the grounds and the clause of its own rulebook that answers each one, its own published route and your clock. See what is in it, free. You never need it to appeal.
Common questions
I couldn't photograph anything at the time. Dead end?
Not necessarily — describe exactly what failed and ask the operator to produce the machine's fault and transaction logs. Patterns of reported faults at the same machine have sunk many charges.
Who issued your ticket?
Private operators and councils run entirely different appeal routes. Find your operator to see whether your independent appeal goes to POPLA or the IAS — or read the council PCN route if your letter says “Penalty Charge Notice”.
Still deciding whether it is worth it?
The question underneath this one is usually about money, not law: if I appeal and lose, does it cost me more than paying today? Check whether appealing puts your discount at risk — free, with the rule quoted from the code that applies to your issuer, and the published odds at independent appeal.
Where these rules come from: Protection of Freedoms Act 2012, Schedule 4 (keeper liability; the notice deadlines are its paragraphs 8 and 9) · British Parking Association · International Parking Community.