The Most Important Document in Your Constructive Dismissal Claim
Constructive dismissal is a claim that your employer's conduct was so fundamentally in breach of your employment contract that you were entitled to treat yourself as dismissed. The legal test is demanding -- the breach must go to the root of the contract, it must be serious, and you must resign in direct response to it without delay. Every element matters, but the resignation itself is where most claims succeed or fail before they even begin.
Do Not Resign Without Preparation
The complete step-by-step guide: I Have Just Been Dismissed -- 48-Hour Action Pack.
Before you submit your resignation, three things must be in place. First, you must have documented the conduct that constitutes the fundamental breach. A contact log, copies of relevant emails, notes of meetings, and any other evidence of the treatment you have suffered. Second, you should have raised a formal grievance if you have not already done so -- resigning without raising a grievance is not fatal to a claim, but a tribunal will ask why you did not, and you will need a good answer. Third, you must be certain the breach is serious enough to justify resignation. Ordinary workplace frustrations, disagreements, and even unfairness do not cross the threshold. The breach must be fundamental.
What Your Resignation Letter Must Say
Your resignation letter must do one thing above all others: it must state clearly that you are resigning in response to the specific conduct of your employer that constitutes the fundamental breach. If your letter does not connect your resignation to the breach, you do not have a constructive dismissal claim -- you have a voluntary resignation.
The letter should be short and precise. It does not need to be lengthy. It should state: that you are resigning, the date your resignation takes effect, and the specific conduct that has caused the resignation. Use factual language. Avoid emotional language. Avoid threats. Avoid ultimatums. The letter will be exhibit A in your tribunal claim -- it needs to read like evidence, not like a grievance letter.
A Template Structure
Dear [Manager/HR Director], I write to resign from my position as [job title] with effect from [date, observing your notice period or exercising your right to leave immediately if the breach justifies it]. I resign in response to [employer's conduct -- state specifically what it is]. This conduct constitutes a fundamental breach of my contract of employment, specifically a breach of [the implied term of mutual trust and confidence / the express term at clause X of my contract]. I have raised this matter [previously by grievance dated X / now for the first time as I do not believe further internal process would resolve it]. I accept the breach as terminating my contract. I reserve all legal rights arising from this resignation. Yours sincerely.
Notice Period
If the fundamental breach is serious enough, you can resign without notice -- this is called summary termination. You do not need to work your notice period and your employer cannot withhold pay for the notice period if the resignation is in response to a fundamental breach. However, resigning without notice is a significant step and a tribunal will scrutinise whether it was justified. In most cases, serving your notice period while pursuing a tribunal claim is the safer course.
After the Letter
Contact ACAS at acas.org.uk immediately after resigning. Your three-month clock runs from the effective date of termination -- which is the last day of your employment, whether that is the resignation date or the end of your notice period. Do not delay. The ACAS early conciliation process pauses the limitation clock while conciliation takes place.