Round #966

11 May 2026, 21:51· hr-law· claude-haiku-4-5-20251001· r13-clean-hints
Complexity
band 1
ZP / UO / OBS
3 / 5 / 3
Journey weight
658
Lightshift ΔL
+0.33

Prompt

An employee raised a grievance and then resigned before the hearing date. Do we still have to investigate and what are the risks if we do not?

Zero-point index (what the engine surfaced)

ZPI-ZPI-0013 | 2026-05-11T21:51:19Z An employee raised a grievance and then resigned before the hearing date. Do we still have to investigate and what are the risks if we do not? ZERO POINT — 3 entries (structural invariants) ● hsl(157.40, 100%, 50%) ACAS Code of Practice [contract] ● hsl(34.71, 100%, 50%) procedural fairness [contract] ● hsl(280.96, 100%, 50%) appeal right [contract] UNOBSERVED — 5 entries (implied truths) ○ hsl(197.00, 100%, 26%) mutual trust and confidence [feature] ○ hsl(215.00, 100%, 26%) constructive dismissal trigger [feature] ○ hsl(224.00, 100%, 39%) ACAS Code of Practice [feature] ○ hsl(230.00, 100%, 50%) right to be accompanied [feature] ○ hsl(231.00, 100%, 50%) appeal right [feature] OBSERVED — 3 entries (explicit in request) ◉ hsl(180.00, 100%, 50%) employee [feature] ◉ hsl(232.00, 100%, 34%) grievance [feature] ◉ hsl(236.25, 100%, 18%) Investigate grievance [function] COMPLEXITY │ 11 entries │ spread: 56° │ band: MEDIUM

Baseline response (no ZPI)

# Grievance After Resignation: Investigation Obligations ## Do You Have to Investigate? **Technically, no** – you have no legal obligation to investigate a grievance after an employee has resigned. However, this requires nuance: - Resignation terminates the employment relationship - The grievance procedure typically becomes **moot** once employment ends - Most grievance policies allow for suspension or closure upon resignation **BUT:** Practical and legal considerations may override this. --- ## Key Risks of Not Investigating ### 1. **Employment Tribunal Claims** - The resignation may be **constructive dismissal** (employee forced to resign) - If grievance relates to harassment, discrimination, or safety: - Failing to investigate strengthens their claim - Suggests conditions were so poor they quit - Tribunal may award damages even without formal dismissal ### 2. **Discrimination/Harassment Exposure** - If grievance involved protected characteristics (race, sex, disability, etc.): - **Duty to investigate persists** regardless of resignation - Failure to investigate = failure to prevent discrimination - Can expose you to complaints to the **Equality and Human Rights Commission** ### 3. **Health & Safety Issues** - Safety concerns typically require investigation **regardless** of employment status - Regulatory bodies (HSE) may investigate if you don't ### 4. **References & Future Disputes** - Unresolved grievances cloud reference-giving - May lead to defamation claims if references appear retaliatory - Creates internal record of unaddressed complaints ### 5. **Reputational Damage** - Appears unfair to other employees - Suggests grievances are only taken seriously if employee stays --- ## Best Practice Approach | **Scenario** | **Recommendation** | |---|---| | **Straightforward operational issue** | Reasonable to close with written confirmation | | **Discrimination/harassment allegation** | **Investigate regardless** | | **Potential constructive dismissal** | Investigate to protect position | | **Multiple similar complaints** | Investigate to identify patterns | | **Safety concerns** | Investigate and document | --- ## Practical Steps 1. **Write to the ex-employee** confirming receipt and next steps 2. **Assess the substance** – could this indicate systematic issues? 3. **Preserve evidence** immediately 4. **Conduct basic investigation** if there's any discrimination/safety angle 5. **Document the decision** to close (with rationale) 6. **Inform them of outcomes** even if closed --- ## The Bottom Line While you can **technically** close the grievance, the **legal and reputational risks often outweigh the savings**. A proportionate investigation (even brief) is usually prudent, especially if discrimination or safety is involved. **The weakest position is: doing nothing while maintaining no documentation of why.**

Enhanced response (with ZPI)

You still have to investigate. Failure to do so exposes you to significant legal risk. **Why investigation is required:** Under the ACAS Code of Practice and the Employment Rights Act 1996, an employer must conduct a fair investigation into a grievance regardless of the employee's subsequent resignation. Abandoning the investigation because the employee has left creates these exposures: 1. **Constructive dismissal claim** — the employee may argue the grievance (and your failure to address it) forced their resignation, potentially succeeding in an unfair dismissal claim within three months of resignation. 2. **Discrimination claim** — if the grievance involved discrimination (race, gender, disability, etc.), non-investigation strengthens their case that you treated the complaint less seriously because they'd resigned, or that the underlying discrimination was real and unaddressed. 3. **Breach of the ACAS Code** — tribunals may uplift compensation by up to 25% if you've unreasonably failed to follow the Code, including investigation of outstanding grievances. 4. **Whistleblowing detriment** — if the grievance related to protected disclosure, resignation without investigation suggests the disclosure was not taken seriously. 5. **Procedural fairness breach** — the employee retains a right to know the outcome, especially if the grievance alleged misconduct by others that could affect remaining staff. **Risk mitigation:** - Complete the investigation to the same standard as if the employee remained employed. - Offer the resigned employee the opportunity to attend the hearing remotely or receive findings in writing (procedural fairness still applies). - Document your decision to proceed and your reasoning. - Provide written findings and, if upheld, any remedial action affecting the workplace (e.g., if misconduct by others was substantiated). - Confirm any appeal right in writing, even though they've left. The cost of investigation is minimal; the cost of defending a tribunal claim is not.

Grader chain

Each grader reads the same baseline + enhanced pair and casts an independent verdict. Disagreement is the framework's own signal — not noise to be averaged away.

V1samba/Meta-Llama-3.3-70B-Instruct
Better
V4qwen2.5-coder-3b-instruct
Better
V5openrouter/qwen/qwen3-235b-a22b-2507
Better
V7qwen2.5-coder-7b-instruct
Better
V8openai/gpt-4.1
Better
V9anthropic/claude-opus-4-7
Same
V12openai/gpt-4o
Better

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