One small typo? Usually cancellation.
If you paid the tariff but made a minor keying error — the industry rules give examples such as 0 instead of O, I instead of L, or 1 instead of I — the industry rules put that in the category where the charge should be cancelled when acceptable evidence is provided.
Old car / partner’s car / several wrong characters? Usually £20.
A major keying error includes things such as entering a previous registration, another vehicle from the household, missing letters or swapped characters. The industry rules say these cases should be reduced to £20 for 14 days, subject to evidence and a few conditions.
The bit people miss
The £20 reduction applies only to the first parking charge issued to that vehicle for that specific contravention, where the £20 is paid within 14 days and no independent appeal is lodged.
💡 Reality check
If your only argument is “I paid, but I entered my old car’s registration” and the operator offers you £20 under the industry rules, taking it to independent appeal simply because a forum told you to “fight everything” may turn a £20 problem back into the normal charge. If you have a separate genuine appeal point, that is different.
What to send
- The best payment evidence you have — ideally a ticket, app receipt or booking confirmation showing the site/time.
- The registration you actually entered. Do not just say “wrong reg”; give them the one they need to search.
- Your correct registration.
- A short explanation linking the two — especially if it was an old or household vehicle.
- If all you have is a card payment, include the amount, approximate time and last four card digits so the operator has a better chance of tracing it.
I paid the required parking tariff for the stay, but I accidentally entered registration [OLD / WRONG REGISTRATION] instead of [CURRENT REGISTRATION]. I have attached evidence of the payment. Please review this as a keying error under the current industry rules.
Where this comes from: the industry rulebook, Annex F.1(h) and F.3(a).