How to Conduct a Fair Workplace Investigation Step-by-Step

Fair workplace investigations are essential to maintaining trust, legal compliance, and psychological safety in any organisation. Whether the allegation involves bullying, harassment, discrimination, or misconduct, how an investigation is handled can affect both the outcome and the organisation’s reputation.

At Synergy Workplace Investigations, we specialise in conducting fair and impartial investigations across Australia. In this blog, we walk you through the step-by-step process of conducting a fair workplace investigation that stands up to scrutiny.

🔍 What Does a Fair Workplace Investigation Involve?

A fair investigation is:

Impartial – conducted by someone with no conflict of interest
Confidential – information is shared on a need-to-know basis
Thorough – all relevant evidence is considered
Procedurally fair – both the complainant and respondent are given the opportunity to be heard

These principles are not only good practice—they are also expected under Australian employment law and workplace health and safety legislation.

✅ Step-by-Step: How to Conduct a Fair Workplace Investigation

Step 1: Receive and Assess the Complaint

Confirm whether the allegation requires formal investigation
Check if the complaint falls under bullying, harassment, misconduct, etc.
Consider if informal resolution (e.g., mediation) is more appropriate

Step 2: Plan the Investigation

Appoint a qualified and impartial investigator (internal or external)
Identify the issues to be investigated
Create an investigation plan with timelines, interviewees, and evidence types
Notify the parties involved and confirm the scope of the investigation

Step 3: Conduct Interviews

Interview the complainant first to clarify details
Provide the respondent with a clear summary of allegations and an opportunity to respond
Interview any witnesses who can corroborate or refute the allegations
Use open-ended, non-leading questions

Step 4: Gather Documentary Evidence

Collect emails, chat logs, text messages, policies, rosters, CCTV footage, etc.
Analyse timelines, consistency, and relevance of all records
Keep records secure and confidential

Step 5: Make Findings Based on the Evidence

Apply the balance of probabilities test (more likely than not)
Use consistent reasoning to weigh up credibility and corroboration
Ensure findings are based on facts, not assumptions or bias

Step 6: Prepare the Investigation Report

Summarise the allegations, evidence, and findings
Clearly state whether allegations are substantiated or not
Avoid making disciplinary recommendations unless specifically required
Ensure the report is objective, well structured, and legally defensible

Step 7: Notify the Outcome and Take Action

Provide outcome letters to the complainant and respondent
Determine and implement any necessary actions (disciplinary, procedural, training, etc.)
Offer support or referrals if wellbeing is affected
Update internal records and close the matter

⚖️ Why Procedural Fairness Matters

Procedural fairness is not just a legal concept—it’s a best practice standard in any workplace investigation. Failing to follow fair process can:

Undermine trust in the organisation
Lead to legal claims or Fair Work Commission action
Result in flawed or challengeable findings

To learn more, see our upcoming blog:
👉 Understanding Procedural Fairness in Workplace Investigations

Get More Information

We give you tonnes more information in our new E-book Investigate Like a Pro – A comprehensive step-by-step best practice guide for Managers and HR Professionals covering all aspects of workplace investigations.

🛡️ Why Use an External Investigator?

Engaging an external investigator like Synergy Workplace Investigations ensures:

True impartiality and objectivity
Experience with complex and sensitive matters
Confidence in handling trauma-informed interviewing
Professional and legally robust reporting

We conduct investigations across Melbourne, Sydney, Brisbane and all regional areas in Australia.

Need Help with a Workplace Investigation?

Synergy Workplace Investigations has extensive experience in handling workplace complaints with discretion, fairness, and legal compliance. Whether you’re in HR, a business leader, or a legal advisor, we’re here to help you navigate the process with confidence.

📞 Contact us today for expert advice on managing your workplace investigation fairly and effectively.

Workplace Investigations

How to Conduct a Fair Workplace Investigation Step-by-Step