How To Conduct Independent Workplace Investigations In Australia

Issues like bullying, harassment, discrimination, fraud or serious misconduct can arise in any workplace - even well-run small businesses.

When concerns are raised, acting quickly and fairly isn’t just best practice. It protects your people, your brand and your legal position.

That’s where independent workplace investigations come in. An investigation that’s impartial, procedurally fair and well-documented will help you uncover the facts and make defensible decisions.

In this guide, we’ll step through when to use an external investigator, how to run a compliant process, and the policies and documents that make investigations smoother and safer for your business.

What Is An Independent Workplace Investigation?

An independent workplace investigation is a formal, impartial process to gather and assess evidence about an allegation in your business.

“Independent” means the person investigating is objective and not involved in the events. That could be an external lawyer or HR consultant, or an internal person with no conflict of interest and appropriate training.

The goal is to establish what likely happened (on the balance of probabilities), not to “prove” a criminal offence. Findings then inform your next steps - from training and mediation through to warnings or termination.

When Should You Appoint An External Investigator?

You don’t always need to outsource. However, bringing in an independent investigator is wise when:

• The allegation is serious (e.g. sexual harassment, discrimination, theft, serious safety breaches).
• Senior staff (or HR) are involved, or there’s a conflict of interest internally.
• There’s a risk of litigation or regulatory scrutiny (e.g. general protections, discrimination or workers’ compensation claims).
• The matter is complex or high-profile, or you need to protect legal professional privilege.
• You lack internal expertise or resources to conduct a timely, procedurally fair process.

An external investigator brings impartiality, proven methodology and defensibility. It also frees your team to keep the business running while the process is handled properly.

How Do You Run A Fair Investigation? (Step By Step)

Every investigation should follow a clear, documented process. The exact steps can vary with the circumstances, but a best-practice approach looks like this.

1) Stabilise The Situation (Interim Measures)

Act promptly to manage risk. This might include changing rosters, separating staff, removing system access or - in some cases - standing down an employee on pay while you investigate. In other situations, short-term suspending an employee from certain duties is appropriate.

Choose the least intrusive step that still protects people, evidence and your business. Document your reasons.

2) Define Scope And Plan

Clarify the allegation(s), timeframe, people involved and issues to determine. Draft an investigation plan covering who will be interviewed, what documents you’ll collect, expected timelines and how you’ll report findings.

Decide if you need external help and whether to engage your legal team so legal professional privilege can apply to advice and (in some cases) investigator communications.

3) Notify The Parties And Set Expectations

Tell the complainant and the respondent what will happen next, who is involved and how privacy will be managed. Avoid absolute promises of confidentiality - you’ll protect information, but some details may need to be shared to ensure a fair process.

Let the respondent know the specific allegations and give them a fair chance to respond with time and information (this is core to procedural fairness).

4) Collect Evidence

Gather relevant documents, policies, emails, messages, CCTV, timesheets, access logs and any physical evidence. Secure and preserve data to prevent deletion or tampering.

If you collect or review personal information, ensure your Privacy Policy and internal processes cover how employee and witness data is handled.

5) Conduct Interviews

Interview the complainant, respondent and witnesses in a logical order. Use open questions, avoid leading, and test conflicting accounts. Offer a support person where reasonable and advise participants of their obligations (e.g. confidentiality and honesty).

Provide the respondent with the material you’re relying on (subject to safety and privacy considerations) so they can meaningfully respond.

6) Assess The Evidence

Evaluate credibility, consistency and corroboration across all sources. Apply the “balance of probabilities” standard (what is more likely than not), taking into account the seriousness of the allegations and potential consequences.

Decide only on what your evidence can support. Where facts are disputed and evidence is limited, explain why you prefer one version over another.

7) Make Findings And Draft The Report

Prepare a clear report setting out the background, allegations, process, evidence, analysis and findings for each allegation. Include any recommended next steps (e.g. training, policy updates, disciplinary process, referral to police).

Keep the report factual and objective. If you engaged lawyers, consider how privilege applies before sharing the document more widely.

8) Communicate Outcomes And Take Action

Inform the complainant and respondent of the outcome at an appropriate level of detail. Where allegations are substantiated and disciplinary action is contemplated, follow a separate, fair process - often starting with a show cause letter and an opportunity to respond.

Implement non-disciplinary recommendations too (like refresher training or policy improvements). Close the loop and monitor for any retaliation or ongoing risks.

What Legal Rules Do You Need To Follow?

Workplace investigations intersect with several areas of Australian law. Keeping these principles front of mind will help you run a process that is fair and defensible.

Procedural Fairness (Natural Justice)

• Give the respondent clear allegations, relevant evidence and a genuine opportunity to respond.
• Ensure the decision-maker is unbiased and not a witness to the events.
• Base findings on evidence collected using a reasonable, consistent process.

Fair Work And Employment Law

If disciplinary action or dismissal is on the table, a fair investigation is critical to defending unfair dismissal or adverse action claims under the Fair Work framework.

Pay particular attention to notice requirements, warnings, and any terms in the Employment Contract that deal with misconduct, confidentiality and processes.

Work Health And Safety (WHS)

You have a duty to provide a safe workplace. For allegations of bullying, harassment or violence, act promptly to manage risk. Interim measures, safety planning and appropriate supports are key while you investigate.

Discrimination, Harassment And Sexual Harassment Laws

Federal and state laws prohibit unlawful discrimination and sexual harassment. Your process should be sensitive, trauma-informed where appropriate, and consistent with your policies and training approach. Where conduct may be criminal, consider whether and how to notify police (and seek legal advice early).

Privacy And Confidentiality

Collect only what you need, store it securely and limit access to those who need to know. Your Privacy Policy and internal confidentiality guidelines should reflect how you handle investigation information, including interview notes and reports.

Whistleblower Protections

Companies covered by the Corporations Act whistleblower regime must follow specific rules on confidentiality, victimisation and handling of protected disclosures. Maintaining a clear Whistleblower Policy and investigator independence will help you comply.

Defamation And Reputational Risk

Be careful how you communicate allegations and findings, both internally and externally. Stick to the facts, share on a need-to-know basis, and document your reasoning.

What Policies And Documents Make Investigations Easier?

A strong policy framework sets expectations early and gives you a clear playbook when issues arise. Consider the following documents for your business.

• Workplace Policy: A central policy (or suite) covering conduct, bullying and harassment, grievance handling, and investigation steps helps everyone understand the rules and the process.
• Employment Contract: Clear terms about acceptable conduct, confidentiality, lawful and reasonable directions, and disciplinary processes reduce ambiguity.
• Privacy Policy: Explains how personal information in investigations is collected, used and stored - important for transparency and compliance.
• Whistleblower Policy: Sets out protected disclosures, confidentiality, and how your business will respond to reports of wrongdoing.
• Employee Termination Documents: Templates for warnings, show cause letters and outcome notices support a fair, consistent disciplinary process when allegations are substantiated.

Depending on your industry, you may also need specialist policies (for example, drug and alcohol procedures for safety-critical roles). If you run testing, align your process with your policy and consider guidance from resources like our overview of drug testing employees.

Should You Stand Down, Suspend Or Keep The Employee At Work?

It depends on risk. Ask yourself: can we keep people safe, protect evidence and avoid disruption without removing the employee from the workplace?

Options include modified duties, changing reporting lines, remote work, or restricting access to certain systems. If that won’t manage risk, consider standing down an employee on pay, or short-term suspending an employee from specific tasks.

Whatever you choose, align with your contracts and policies, communicate clearly, and record your reasoning. If you’re unsure, it’s prudent to speak with an employment lawyer before taking action.

Independent Vs Internal Investigations: What’s Right For You?

Internal investigations can be appropriate for lower-risk matters when you have trained personnel who are truly impartial. They’re cost-effective and fast, and they build internal capability.

Independent investigations shine where impartiality could be questioned, stakes are high, or you anticipate legal scrutiny. The report can also carry more weight with employees, boards and regulators. Many businesses take a hybrid approach: a quick internal triage followed by external investigation for serious or sensitive matters.

Common Mistakes (And How To Avoid Them)

• Skipping a plan: Diving into interviews without scope and structure leads to gaps. Write a brief plan first.
• Confidentiality overreach: Promising total secrecy can backfire. Instead, explain you’ll share information on a need-to-know basis to ensure a fair process.
• Not disclosing the case to answer: If respondents don’t get specifics and relevant material, findings are at risk. Provide enough detail and time for a meaningful response.
• Leading questions: Steer clear of questions that suggest answers. Use open, neutral questions and follow evidence.
• Inconsistent treatment: Apply policies and processes consistently to avoid claims of bias or adverse action.
• No paper trail: If it’s not documented, it didn’t happen. Keep clear notes, decisions and reasons at each stage.
• Jumping straight to discipline: Keep investigation and disciplinary decisions separate. Use a fresh step with a show cause letter and a chance to respond.

How Can Small Businesses Keep Investigations Proportionate?

You don’t need a months-long process for every issue. Proportionality is key - match the depth and formality of the investigation to the seriousness of the allegation and potential outcomes.

For minor issues, a short-form inquiry with a few interviews and a brief outcome note may suffice. For serious conduct or where termination is possible, take a more formal approach, ensure robust evidence collection and produce a structured report.

Either way, keep to reasonable timeframes. Delays can harm workplace culture and pose legal risk. Set expectations early and communicate respectfully if timelines shift.

Practical Tips To Protect Your Business

• Train leaders: Give managers basic investigation and interviewing skills so they can triage issues effectively.
• Keep policies current: Review your Workplace Policy annually and after any significant incident.
• Consider privilege: Where stakes are high, involve legal counsel early to structure the process and preserve privilege over legal advice.
• Support participants: Offer EAP or support persons where appropriate. A respectful process builds trust and reduces risk.
• Separate roles: Use different people for investigating and deciding disciplinary outcomes to reduce bias concerns.
• Close the loop: Communicate outcomes appropriately and check in after the process to ensure no victimisation occurs.

Key Takeaways

• Independent workplace investigations help you respond to serious allegations fairly, protect your people and make defensible decisions.
• Use interim measures that are proportionate - options range from modified duties through to standing down an employee while you investigate.
• Follow a clear process: scope and plan, notify parties, collect evidence, interview fairly, assess on the balance of probabilities, and report findings.
• Comply with key legal duties, including procedural fairness, Fair Work obligations, WHS, discrimination laws, privacy and (where applicable) whistleblower protections.
• Strong policies and documents - like a Workplace Policy, Employment Contract and Whistleblower Policy - make investigations smoother and reduce risk.
• For high-stakes or conflicted matters, an external investigator and early input from an employment lawyer can be the most efficient and defensible path.

If you’d like a consultation about running independent workplace investigations in your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.