Constructive dismissal claim fails over effective date of termination and ACAS document admissibility
A Sales Support Coordinator's constructive unfair dismissal claim was dismissed after the tribunal ruled the effective date of termination was her resignation date, making ACAS early conciliation documents irrelevant and inadmissible.
1 min read · Last updated 18 May 2026
Case details
Key facts
- The claimant resigned with immediate effect on 12 November 2018.
- The claimant did not retract her resignation after being offered the chance to reconsider.
- The respondent was found to have victimised the claimant by refusing to provide a reference in a previous discrimination case.
- The claimant sought to introduce ACAS early conciliation documents, but they were ruled irrelevant and inadmissible.
- The effective date of termination was determined to be 12 November 2018.
Timeline
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Claimant learns of victimisation finding
The claimant became aware of the oral judgment in her discrimination case, which found she had been victimised by the respondent's refusal to provide a reference.
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Claimant resigns
The claimant sent a letter of resignation with immediate effect, citing the victimisation as a fundamental breach of trust and confidence.
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Claim presented
The claimant presented her claim for unfair constructive dismissal to the Employment Tribunal.
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Case management hearing
Employment Judge Feeney held a preliminary hearing to discuss disclosure and the effective date of termination.
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Preliminary hearing on EDT and admissibility
Employment Judge Warren heard evidence and submissions on the effective date of termination and the admissibility of ACAS documents.
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Judgment on EDT and admissibility
Employment Judge Warren issued a judgment finding the effective date of termination was 12 November 2018 and that ACAS documents were irrelevant and inadmissible.
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Reconsideration refused
Employment Judge Warren refused the claimant's application for reconsideration, noting that HMRC records did not cast doubt on the factual findings.
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Final reconsideration and strike out
Employment Judge Eeley confirmed the effective date of termination as 12 November 2018 and struck out the second claim (2414057/2019) as having no reasonable prospects.
The legal issue
The tribunal had to determine the effective date of termination of the claimant's employment and whether documents from ACAS early conciliation were admissible in her constructive unfair dismissal claim.
The outcome
The tribunal decided that the effective date of termination was 12 November 2018, the date the claimant resigned with immediate effect. The ACAS early conciliation documents were ruled irrelevant and inadmissible because they arose after the termination date and could not be relevant to the reasons for resignation. The claim was therefore struck out as having no reasonable prospects.
- No compensation awarded as the claim was dismissed.
Lessons & takeaways
- The effective date of termination is crucial in constructive dismissal claims; resigning with immediate effect can limit the scope of evidence considered.
- ACAS early conciliation discussions are generally inadmissible in subsequent tribunal proceedings, especially if they occur after the resignation.
- If you resign with immediate effect, you cannot later rely on events after that date to support your constructive dismissal claim.
- Seeking to introduce without prejudice or ACAS documents without a clear legal basis can harm your case and lead to strike out.
This case shows how critical the effective date of termination (EDT) is in constructive dismissal claims. The Sales Support Coordinator resigned with immediate effect on 12 November 2018, citing a victimisation finding as the fundamental breach. However, she later tried to rely on ACAS early conciliation discussions that took place after her resignation to support her claim. The tribunal made clear that once she resigned with immediate effect, the EDT was fixed, and any subsequent events could not be relevant to her reasons for leaving.
What the respondent did right
R-Com Consulting Limited successfully argued that the ACAS documents were irrelevant because they post-dated the resignation. The tribunal agreed, noting that if the resignation had been stayed (e.g., withdrawn and later reinstated), the ACAS discussions might have been relevant. But the claimant did not retract her resignation when offered the chance to reconsider, so the EDT remained 12 November 2018.
Why this matters for similar claims
This case is a reminder that resigning with immediate effect can be a double-edged sword. While it may feel decisive, it can also shut the door on evidence that might support your claim. If you are considering constructive dismissal, think carefully about whether to resign with immediate effect or give notice. Also, be aware that ACAS early conciliation discussions are generally confidential and cannot be used in tribunal unless there is a specific exception, such as evidence of unreasonable behaviour. Here, the tribunal found no such exception, and the claim was struck out as having no reasonable prospects.
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