The Burden of Proof in Whistleblower Cases

Since 2023: show the disclosure and the detriment, and your employer must prove the two are unconnected.

Before 2023, Irish retaliation cases died in one place: causation. The worker could show the report and show the punishment, but proving the connection — what was in the employer’s head — was the wall. The Amendment Act demolished that wall and rebuilt it facing the other way. Understanding the new architecture is understanding your case.

The Presumption, Mechanically

Establish two foundations — a protected disclosure (information tending to show relevant wrongdoing, reasonable belief, protected channel: the elements) and detriment within the widened definition (what counts) — and the statute presumes the detriment resulted from the disclosure unless the employer proves it was based on duly justified grounds. The qualifier bites: grounds must be genuine and justified, not articulable-after-the-fact. The restructure invented in the month after your report, the performance file that starts when the temperature changed — these are the justifications the presumption was built to see through.

Where the Fight Actually Moves

Employers read the same statute, so their energy relocates to the threshold: characterisation — arguing your report was an excluded interpersonal grievance, or lacked reasonable belief, so the presumption never engages. Win characterisation and the machinery carries you; lose it and nothing else matters. That is why the framing of your report — ideally before it’s made, urgently after — is the highest-stakes legal work in this field, and why the “just a grievance” letter deserves a legal answer rather than acceptance.

Time limits in these cases are short, strict, and depend on your exact circumstances — WRC complaints generally run on months, civil claims on years, and important extensions exist, particularly for survivors of abuse. Never assume you are out of time, and never assume you have time: take advice promptly. Nothing on this page is legal advice for your situation.

Making the Presumption Work

The contest is their justification against your record — so the record is the case: contemporaneous notes with dates, messages preserved somewhere personal, your disclosure and its acknowledgment kept, the before-and-after documented as it happens. The presumption opens the door; the timeline walks through it. Machinery, remedies and routes in full: the penalisation practice — and where it’s happening now, interim relief runs on 21 days.

They Have to Prove It Wasn't Retaliation

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Related Reading

Burden of Proof - FAQs

The foundations: that you made a protected disclosure (information, relevant wrongdoing, reasonable belief, protected channel) and that you suffered detriment within the widened statutory definition. Those established, the presumption engages: the detriment is deemed to result from the disclosure unless the employer proves otherwise. So your case-building focuses exactly there - the disclosure’s protected character defended (the “just a grievance” fight), and the detriment documented. The causation battle that used to kill these cases is now primarily the employer’s problem.

About the Author

Richard O’Shea, Solicitor practises with Mary Molloy Solicitors (established 1981), acting for whistleblowers facing penalisation, workers experiencing harassment, and people pursuing civil claims, throughout Ireland. Richard holds a Diploma in Mediation from the Law Society of Ireland — used in this work only as these cases should use it: as one option among several that always remain the client’s choice. Consultations are confidential. Contact Richard on 01 5827148 or richardoshea@marymolloysolicitors.com.

This article is for general information only and does not constitute legal advice. Every situation is different, and you should obtain advice on your own circumstances before acting. In contentious business, a solicitor may not calculate fees or other charges as a percentage or proportion of any award or settlement.