A Resignation Letter Due to Disciplinary Action is a formal written document in which an employee in England and Wales gives notice of their resignation from employment in direct response to disciplinary action taken against them by their employer. Where the disciplinary action is sufficiently serious — where it amounts to a fundamental breach of the employment contract, including a breach of the implied term of mutual trust and confidence — the employee may resign and subsequently bring a claim for constructive unfair dismissal at an Employment Tribunal under section 95(1)(c) of the Employment Rights Act 1996.

The legal framework governing employment and dismissal in England and Wales centres on the Employment Rights Act 1996 (ERA 1996). The ERA 1996 provides that an employee is dismissed if: (a) the employer terminates the contract (a direct dismissal under section 95(1)(a)); (b) the employer gives notice of termination and the employee terminates during the notice period (section 95(1)(b)); or (c) the employee terminates the contract in circumstances in which they are entitled to do so by reason of the employer's conduct — constructive dismissal under section 95(1)(c). Constructive dismissal is thus a particular form of dismissal initiated by the employee rather than the employer.

For a resignation to constitute constructive dismissal, the employer must have committed a fundamental or repudiatory breach of the employment contract. The most commonly invoked implied term is the duty of mutual trust and confidence, established in Malik v Bank of Credit and Commerce International SA [1997] UKHL 23, which holds that an employer must not, without reasonable and proper cause, conduct itself in a manner calculated or likely to destroy or seriously damage the relationship of confidence and trust between employer and employee. Disciplinary action that is dishonest, arbitrary, without factual foundation, or conducted in flagrant disregard of the ACAS Code of Practice on Disciplinary and Grievance Procedures 2015 may satisfy this test.

The ACAS Code of Practice on Disciplinary and Grievance Procedures is a statutory code of practice approved by Parliament under section 199 of the Trade Union and Labour Relations (Consolidation) Act 1992. Although not itself a source of legal rights, the Code sets out the minimum procedural standards for disciplinary processes in England and Wales. Employment Tribunals are required to take the Code into account when assessing the fairness of a dismissal (section 207 TULRCA 1992), and may adjust compensation by up to 25% where either party unreasonably fails to follow it.

A resignation letter due to disciplinary action serves multiple purposes: it provides the employee's written record of the grounds for resignation; it puts the employer on formal notice of the employee's position; it preserves the employee's legal rights and the factual basis for any constructive dismissal claim; and — if a 'without prejudice' settlement proposal is included — it opens a dialogue for resolution without tribunal proceedings.

A Resignation Letter Due to Disciplinary Action is appropriate in England and Wales where an employee is considering resigning in response to disciplinary action that they believe is unfair, disproportionate, or conducted in breach of the ACAS Code of Practice or the employer's own disciplinary policy.

The most common scenarios include: receipt of a formal written warning or final written warning where the employee believes the underlying allegation has no factual basis, or the disciplinary hearing was procedurally unfair (for example, inadequate notice, failure to disclose evidence, or denial of the right to be accompanied by a trade union representative or colleague under section 10 of the Employment Relations Act 1999); suspension from work pending a disciplinary investigation where the suspension is imposed in a manner that is punitive rather than investigatory and amounts to a breach of trust and confidence; demotion or change of duties following a disciplinary process where the employee has not consented to the variation; or a pattern of conduct by the employer that, taken together (the 'last straw' doctrine: Lewis v Motorworld Garages Ltd [1986] ICR 157), amounts to a fundamental breach entitling the employee to resign.

An employee who believes they are being subjected to unfair disciplinary action should, before resigning, consider taking the following steps: obtaining specialist employment law advice from a solicitor regulated by the Solicitors Regulation Authority or from their trade union; raising a formal grievance under the ACAS Code (failure to do so can reduce compensation by up to 25%); attending the disciplinary hearing and exercising the right to be accompanied; appealing against any disciplinary sanction; and documenting all communications and meetings.

Once the decision to resign is made, the resignation letter should be sent promptly. In constructive dismissal law, the employee must not affirm the contract by continuing to work for an unreasonable period after the fundamental breach has occurred. While there is no fixed time limit for resignation (it depends on the circumstances), an employee who continues in employment for many months after the breach without protesting risks being held to have accepted or affirmed the breach: Bashir v Commissioner of Police of the Metropolis [2009] IRLR 190.

A Resignation Letter Due to Disciplinary Action for England and Wales should include the following key elements to protect the employee's legal position and preserve the basis for any Employment Tribunal claim.

Clear resignation notice is the foundation: state your job title, your employer's full name, the date of the letter, the notice period you are giving (in accordance with your contract), and your last working day. A precise effective date of termination is important because the 3-month time limit for bringing an Employment Tribunal claim runs from this date.

Identification of the disciplinary action complained of must be specific. State the type of disciplinary action (warning, suspension, demotion, etc.), the date it was imposed, and the allegation or conduct that was the subject of the disciplinary process. Vague references to 'unfair treatment' are less effective than a precise factual account.

Statement of the ACAS Code failings should identify the specific procedural deficiencies: inadequate investigation, insufficient notice of the disciplinary hearing, failure to provide copies of evidence, denial of the right to be accompanied, or denial of the right of appeal. This evidence is directly relevant to the Employment Tribunal's assessment of the reasonableness of the employer's conduct.

Constructive dismissal reservation is a critical element if you intend to bring a claim. State explicitly that you consider the disciplinary action to constitute a fundamental breach of your employment contract (in particular the implied term of mutual trust and confidence), that you are resigning in response to that breach, and that you reserve your right to bring a constructive unfair dismissal claim under section 95(1)(c) of the Employment Rights Act 1996.

Reference to any grievance already raised strengthens the letter. If you have submitted a formal grievance and the outcome has been disputed or disregarded, refer to it specifically. The employer's failure to properly address a grievance may itself be relevant evidence of breach of trust and confidence.

ACAS early conciliation reminder: mention that you are aware of the obligation to notify ACAS before commencing Employment Tribunal proceedings under section 18A of the Employment Tribunals Act 1996.

Without prejudice settlement proposal (if desired): include a without prejudice section proposing a specific settlement sum. This invites resolution without tribunal proceedings and, if rejected, is inadmissible in any subsequent claim under section 111A of the Employment Rights Act 1996 and the Rush & Tompkins principle.

Outstanding entitlements: request confirmation of final salary, accrued holiday pay, notice pay (or payment in lieu), and P45 arrangements. Failure by the employer to pay these sums may give rise to unlawful deduction from wages claims under Part II of the Employment Rights Act 1996.