If you receive a disciplinary sanction you think is unfair, you have the right to appeal. This guide explains how to write a disciplinary appeal letter, the grounds for appeal, and what happens at the appeal hearing.
Receiving a disciplinary outcome — whether a warning, demotion, or dismissal — can feel like the end of the process. But it is not. You have the right to appeal, and a well-argued appeal can have the outcome overturned, the sanction reduced, or the record corrected.
This guide explains how the appeal process works, how to write an effective appeal letter, and what to do if the appeal fails.
Under the ACAS Code of Practice on Disciplinary and Grievance Procedures, you must always be offered the right to appeal a disciplinary decision. This is not optional — an employer who fails to offer an appeal has failed to follow the Code, and any tribunal can award up to 25% more in compensation as a result.
Your right to appeal applies to:
You can appeal on any basis you believe is justified. Common grounds include:
The process was not followed correctly. Examples:
The punishment does not fit the misconduct. Even if the allegation is proven, dismissal may be too severe compared to:
Evidence has emerged that was not available at the time of the original hearing and which may change the outcome.
The decision-maker had already made up their mind before the hearing, or there was a conflict of interest.
The outcome was based on an inaccurate or incomplete finding of facts — for example, CCTV footage was misinterpreted, or a witness account was taken at face value without scrutiny.
Your appeal should be submitted in writing, usually within the timeframe specified in your employer's policy (commonly 5–10 working days from receiving the decision letter).
Your appeal letter should:
I am writing to formally appeal against the decision of [name/title] on [date] to [impose a final written warning / dismiss me for gross misconduct / etc.].
The grounds for my appeal are as follows:
1. [Ground 1 — e.g. Procedural unfairness] [Explain the specific failure and its impact on the fairness of the outcome]
2. [Ground 2 — e.g. Disproportionate sanction] [Explain why the sanction was excessive given your record, the nature of the conduct, and comparable treatment of other employees]
I respectfully request that the appeal is heard by a manager who was not involved in the original disciplinary process.
Once you submit your appeal, your employer must arrange an appeal hearing within a reasonable time. At the hearing:
The appeal panel has several options:
Exhausting internal appeals is an important step before taking a claim to the employment tribunal. If the appeal fails and you were dismissed:
If you received a warning (not dismissal), you can still bring a tribunal claim in limited circumstances — for example, if the warning was itself discriminatory or an unlawful detriment.
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