Workplace Investigations and Procedural Fairness in Australia

When issues arise at work - such as allegations of misconduct, bullying, harassment, discrimination or serious performance concerns - running a fair, well-documented investigation protects your people and your business.

Handled poorly, investigations can spiral into claims of unfair dismissal, general protections disputes, or reputational damage. Handled well, they demonstrate that you took the matter seriously, followed a clear process, and reached a reasoned decision.

In Australia, the concept that ties this all together is “procedural fairness” (often called natural justice). In plain English, it means you give the employee a fair go before you make decisions that might affect their employment.

In this guide, we’ll walk through what procedural fairness looks like in practice, when to investigate, a step-by-step process you can use, the documents to prepare, and the common pitfalls that catch employers out.

What Is Procedural Fairness In Workplace Investigations?

Procedural fairness is about the fairness of your process, not the outcome you eventually reach. In a workplace investigation, it generally requires that you:

• Identify the specific allegations and give them to the employee clearly and in writing.
• Give the employee a genuine opportunity to respond with enough detail and time to do so.
• Conduct an impartial fact-finding process (avoid pre‑judging and keep an open mind).
• Consider all relevant evidence (and not irrelevant material) before making findings.
• Allow a support person to be present in meetings, if requested.
• Keep confidentiality (on a “need to know” basis) and protect participants from victimisation.
• Provide reasons for your decision and communicate the outcome appropriately.

These ideas are reflected in unfair dismissal law. The Fair Work Commission looks at whether a dismissal was harsh, unjust or unreasonable, including factors similar to the above. For context, the Commission’s criteria appear in section 387 of the Fair Work Act - which is why your investigation process matters so much.

When Must You Run A Workplace Investigation?

You should consider an investigation whenever a complaint or concern, if proven, could lead to disciplinary action, dismissal, or significant risk to safety or your business. Common triggers include:

• Bullying, harassment, discrimination or victimisation complaints.
• Serious misconduct (e.g. theft, fraud, violence, serious policy breaches).
• Safety incidents or WHS concerns.
• Serious performance allegations or repeated policy non-compliance.

Sometimes you may need to separate parties or remove a person from the workplace while you gather facts. Depending on your circumstances and any applicable industrial instrument, you may be able to use a temporary suspension or a stand down.

• Suspension pending investigation is typically on pay (unless your contract or award says otherwise), and helps preserve workplace safety and integrity of evidence.
• Standing down an employee is a specific, limited legal power - only available in defined situations (for example, when the employee can’t be usefully employed due to a stoppage of work or for safety reasons).

Be careful to choose the right option, explain it in writing, and keep any temporary measures under review so they remain reasonable.

Step-By-Step: How To Run A Fair Workplace Investigation

You don’t need a massive HR team to do this well. A clear, consistent process will get you most of the way there.

1) Triage The Issue And Plan The Process

Start by identifying the nature of the allegation (e.g. bullying vs. misconduct vs. performance). Check relevant policies, contracts and any applicable award or enterprise agreement.

Decide who will investigate. For smaller businesses, it may be an internal manager who is not directly involved. If there’s a conflict of interest, consider an external investigator.

Set a plan and timeline: who you will interview, what documents you need, what issues are in scope, and any interim measures (like suspension) needed to keep things safe and fair.

2) Preserve Evidence And Maintain Confidentiality

Secure relevant records early (emails, messages, CCTV, timesheets, system logs). Limit access to a small group and instruct participants not to discuss the matter while it’s ongoing.

Where electronic records are involved, ensure any review of communications is proportionate and consistent with your policies. It may help to revisit your approach to employer access to employee emails so your practices align with privacy and surveillance laws in your state or territory.

3) Notify The Respondent Of Specific Allegations

Write to the employee who is the subject of the allegation (the “respondent”). Set out:

• The specific allegations (who, what, where, when) and relevant policies said to be breached.
• That an investigation will be conducted and by whom.
• How they can respond (in writing and/or at an interview), their right to a support person, and a reasonable timeframe.
• Any interim measures (e.g. suspension) and expectations (confidentiality, non‑retaliation).

Clarity here is essential. Vague or shifting allegations are a common reason processes fall over.

4) Interview Complainants And Witnesses (Objectively)

Use open questions first (“tell me what happened”), then clarify timelines, details and any documents or messages that support their account. Take comprehensive notes and ask each person to review and confirm key points.

Keep your approach neutral. Don’t promise outcomes or make comments that suggest you’ve already reached a conclusion.

5) Interview The Respondent And Consider Their Evidence

Give the respondent access to the information they need to respond fairly (for example, the gist of the complaint and key particulars). Avoid “trial by ambush”.

Ask for their version of events, any witnesses, and any documentary evidence (messages, emails, rosters). If new allegations emerge, pause and put them to the respondent in writing so they have a fair chance to respond.

6) Assess The Evidence And Make Findings

Weigh the credibility and consistency of accounts, the plausibility of timelines, and objective records. The standard is “on the balance of probabilities” - what is more likely than not, given the evidence you have.

Document your reasoning. Note any inconsistencies, why you accepted certain evidence, and how policies apply. Keep your findings separate from the final decision (e.g. what disciplinary outcome, if any, is appropriate).

7) Issue A Show Cause And Consider Responses

If your findings indicate there may be a breach warranting disciplinary action (such as a warning or dismissal), give the employee a chance to respond to the proposed outcome. A Show Cause Letter outlines the findings and the potential action, and invites submissions before you decide.

This extra step often makes the difference between a fair and an unfair process because it demonstrates you genuinely considered their side before finalising the outcome.

8) Decide And Communicate The Outcome

After considering any show cause response, decide on a proportionate outcome. Options can include training or coaching, a formal warning, redeployment, or termination in serious cases.

Communicate the decision in writing, explaining your reasoning at a level of detail that respects privacy but demonstrates fairness. Where termination is contemplated, check that your final letter lines up with your policies, contract and the section 387 factors (notice, reasons, response opportunity, support person, and so on).

What Should Go In Your Investigation Documents?

Good paperwork doesn’t just keep you organised - it is often what convinces a tribunal that your process was fair. Key documents include:

• Investigation Plan: scope, issues, witnesses, records to collect, and a timeline.
• Allegation Letter: clear particulars, relevant policies, process steps and response options.
• Interview Records: signed or confirmed notes/transcripts for each interviewee.
• Evidence Log: documents, messages, screenshots and how they were collected.
• Findings Report: your factual findings and reasons (separate from any decision on outcome).
• Show Cause Letter: proposed disciplinary action and an invitation to respond.
• Outcome Letter: final decision, reasons, and any right to appeal or review under your policy.

Templates save time, but they still need to be tailored to the circumstances. Many employers use an Employee Termination Documents Suite so allegation letters, show cause letters and outcome letters are consistent and compliant.

Finally, ensure your workplace rules are clear. A current, accessible set of policies creates the standards you’ll assess against and gives everyone confidence in the process. If you’re refreshing your framework, consider a practical, plain‑English Workplace Policy set that covers investigations, conduct, grievance handling, bullying and harassment, and privacy.

Common Pitfalls That Create Unfair Dismissal Risk

Here are the mistakes we see most often - and how to avoid them.

Vague Or Moving Allegations

Allegations should be specific and stable. If new issues pop up, put them in writing and give the employee a chance to respond rather than surprising them in an outcome letter.

Not Letting The Employee Have A Support Person

While you don’t have to organise one, refusing a reasonable request for a support person can weigh against you in an unfair dismissal claim. Set this expectation clearly in your invitation letters.

Pre‑Judging Or Relying On Assumptions

Keep an open mind. Ask clarifying questions. Test timelines and corroborate with objective records. Decisions built on assumptions rather than evidence are easy to challenge.

Skipping The Show Cause Step

Even if you think the facts are clear, a brief show cause process often surfaces additional information and demonstrates procedural fairness. Build this into your standard approach with a clear Show Cause Letter.

Overlooking Contractual And Award Requirements

Check the employee’s contract and any applicable award or enterprise agreement before you suspend, stand down or dismiss. For example, the rules around standing down are strict, and notice requirements differ depending on the instrument and the reason for termination.

Assuming “Probation” Means “No Process”

You still need a fair process, even during probation. While qualifying periods affect access to unfair dismissal, other risks (like discrimination or adverse action) still apply. A short, fair process during termination during probation helps reduce those risks.

Letting The Process Drift

Investigations should be prompt, but thorough. Set and communicate timelines, keep parties updated, and close the loop as soon as you can without compromising quality.

Practical Tips For Small Businesses

Good process doesn’t have to be complicated. These simple habits go a long way:

• Start from your policies: they set expectations and guide the steps you take.
• Use checklists and templates for allegation letters, interviews and outcomes.
• Keep notes as if someone neutral will read them later - because they might.
• Separate “findings” (what happened) from “outcome” (what you’ll do about it).
• Offer a support person, set reasonable response times, and confirm key points in writing.
• If in doubt, pause and get advice before you take an irreversible step.

If your investigation points to a mutually agreed exit rather than disciplinary action, a well-drafted Employee Separation Agreement can give both parties clarity and closure while protecting your business (for example, confidentiality, non‑disparagement and release terms).

What To Put In Your Workplace Investigation Policy

A clear policy helps everyone understand the rules of the road before an issue arises. Consider including:

• Scope and definitions: what kinds of issues the policy covers.
• How to raise concerns: informal vs formal pathways and who to contact.
• Investigation steps: intake, notification, interviews, findings and outcome.
• Rights and expectations: confidentiality, support person, non‑victimisation.
• Interim measures: when suspension or alternative duties may be used.
• Record-keeping: how notes, evidence and findings are stored and who can access them.

Align the policy with your contracts and other documents (Code of Conduct, Bullying & Harassment, Grievance Procedure). If you’re refreshing your suite, it’s a good time to update your Workplace Policy pack and any related templates, so everything works together.

Key Takeaways

• Procedural fairness means a clear, unbiased process: clear allegations, a real chance to respond, and decisions based on evidence.
• Use a step-by-step approach: plan, preserve evidence, notify in writing, interview fairly, make findings, issue a show cause, then decide and communicate.
• Document everything: plans, interview notes, evidence logs, findings and outcome letters - good records are your best defence.
• Be careful with interim measures: choose between suspension and stand down lawfully and keep them under review.
• Avoid common pitfalls: vague allegations, refusing support persons, pre‑judging, or skipping the show cause stage increase unfair dismissal risk.
• Strong templates and policies (including a clear investigation policy and a practical termination document suite) make a fair process easier, faster and more consistent.

If you’d like a consultation on workplace investigations and procedural fairness for your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.