What Is a Workplace Investigation?
A workplace investigation is the process an employer uses to gather facts before making any decisions about:
- Disciplinary action
- Misconduct allegations
- Complaints or grievances
- Bullying or harassment claims
- Performance concerns
- Health & safety breaches
- Whistleblowing reports
The investigation must be fair, impartial, and evidence based, following the ACAS Code of Practice.
Your Legal Rights During an Investigation
1. Know What You're Being Investigated For
Your employer must tell you:
- The nature of the allegation
- The timeframe involved
- Any relevant policies
- What evidence they are reviewing
2. A Fair and Impartial Investigator
The investigator must:
- Be neutral
- Have no conflict of interest
- Avoid pre judging the outcome
3. Provide Your Side of the Story
You must be given the opportunity to:
- Respond to allegations
- Provide evidence
- Suggest witnesses
- Correct inaccuracies
4. Confidentiality
Your employer must handle the investigation discreetly and professionally.
5. Reasonable Timescales
Investigations should be completed promptly — unnecessary delays can make the process unfair.
What Employers Must Do in a Fair Investigation
A fair investigation should include:
1. Gathering Evidence
This may include:
- Emails
- CCTV
- Witness statements
- Documents
- System logs
- Policies
2. Interviewing Relevant Parties
This includes:
- The employee under investigation
- Witnesses
- Managers involved
- Anyone with relevant information
3. Keeping an Open Mind
The investigator must not:
- Assume guilt
- Ignore evidence
- Selectively choose information
4. Documenting Everything
A proper investigation report should include:
- Summary of allegations
- Evidence reviewed
- Witness statements
- Findings
- Recommendations
Types of Workplace Investigations
Misconduct Investigations
Used for issues such as:
- Behaviour concerns
- Policy breaches
- Inappropriate conduct
Grievance Investigations
Used when an employee raises concerns about:
- Bullying
- Harassment
- Discrimination
- Unfair treatment
Performance Investigations
Used to understand:
- Capability issues
- Training gaps
- Support needs
Whistleblowing Investigations
Used when an employee reports:
- Illegal activity
- Safety risks
- Regulatory breaches
What Makes an Investigation Unfair?
An investigation may be unfair if your employer:
- Fails to interview key witnesses
- Ignores evidence that supports your case
- Uses biased or conflicted investigators
- Withholds evidence from you
- Pre decides the outcome
- Takes too long without justification
- Treats you differently from others in similar situations
How to Protect Yourself During an Investigation
- Request written details of the allegations
- Ask for copies of evidence
- Keep your own notes
- Provide a clear, factual statement
- Identify witnesses who can support your version of events
- Stay calm and professional
- Challenge inaccuracies immediately
- Follow up in writing after meetings