How To Write A Warning Letter For Inappropriate Workplace Behaviour In Australia

Inappropriate workplace behaviour can put you in a tough spot as a small business owner. You want to protect your team, your culture, and your customers - but you also need to handle misconduct and performance issues fairly and lawfully.

One of the most practical tools in your performance management toolkit is a warning letter for inappropriate behaviour. When done properly, it helps you document what happened, make your expectations clear, and give the employee a genuine chance to improve. When done poorly (or not at all), it can create confusion, increase legal risk, and make a later termination harder to defend.

In this guide, we’ll walk you through how to write a warning letter for inappropriate workplace behaviour in Australia, what to include, what to avoid, and how to manage the process in a way that aligns with Fair Work expectations and good business practice.

What Is A Warning Letter For Inappropriate Behaviour (And When Should You Use One)?

A warning letter is a formal written notice to an employee that:

• their behaviour has breached workplace standards (or directions),
• the behaviour must stop or improve, and
• there may be consequences (including further disciplinary action or termination) if it continues.

In practice, a warning letter for inappropriate behaviour is commonly used for issues like:

• bullying, intimidation, aggressive or disrespectful communication
• sexual harassment or inappropriate comments (serious incidents may require immediate escalation)
• discrimination or derogatory remarks
• swearing at colleagues, customers, or suppliers
• refusing lawful and reasonable directions
• unsafe conduct (including breaches of WHS procedures)
• misuse of workplace technology or privacy breaches

It can also be used where conduct isn’t “serious misconduct” but still isn’t acceptable and needs to change.

Do You Always Need A Warning Letter?

Not every situation requires a formal warning letter. Sometimes a quick, documented coaching conversation is enough. Other times, the behaviour is so serious that you may need to move straight to an investigation and potential termination.

As a general guide:

• Lower-level conduct issues (eg rude tone, minor conflict, repeated lateness tied to behaviour) often start with a conversation and/or a first written warning.
• Repeated conduct issues usually need escalating written warnings with clear improvement expectations and timeframes.
• Serious allegations (eg threats, violence, harassment, theft) often require an investigation. Depending on the circumstances (and any applicable award, agreement or contract terms), you may also consider whether a lawful stand down is appropriate while you investigate.

If you’re considering standing someone down, it’s worth getting advice early, because the rules can be nuanced and fact-specific. In many cases, employers follow a structured approach similar to standing down an employee pending investigation before deciding what action is appropriate.

Before You Write: The Key Legal And Practical Checks Employers Should Make

A warning letter should never be your first “real” step if you haven’t clarified what actually happened. Before you draft anything, take a moment to make sure your approach is defensible and consistent.

1. Clarify The Allegations (Stick To Facts)

Collect the basic information:

• What exactly was said or done?
• When and where did it happen?
• Who witnessed it?
• Is there supporting evidence (emails, CCTV, messages, customer complaint, incident report)?

Where possible, keep your focus on what you can prove. Overstating allegations in a warning letter can backfire if the matter escalates.

2. Check Your Policies And Contracts

Your warning letter should link back to clear standards - usually found in your workplace policies, code of conduct, and the employee’s contract. If you don’t have these documents in place, it’s much harder to argue the employee “knew” what was expected.

Many small businesses use a tailored Employment Contract plus workplace policies (often in a handbook) so expectations around conduct, harassment, bullying, WHS and social media use are clear from day one.

3. Consider Procedural Fairness (Even For Small Businesses)

In Australia, a key theme in employment disputes is whether the employee was treated fairly in the process. That generally means:

• the employee was told what the issue was (in clear terms)
• they had a chance to respond
• you genuinely considered their response
• the outcome was proportionate to the conduct

A warning letter is usually stronger when it follows a meeting where you gave the employee an opportunity to explain what happened.

4. Decide Whether This Is Performance Or Misconduct (Or Both)

Inappropriate behaviour is typically treated as misconduct (a conduct issue), but sometimes it overlaps with performance (eg poor communication style affecting teamwork).

The label matters less than the clarity of your expectations. A good warning letter makes it clear what needs to change and what support is available.

How To Structure A Warning Letter For Inappropriate Workplace Behaviour

When you’re writing a warning letter for inappropriate behaviour, you want to be firm, clear, and neutral. Think “professional and factual”, not emotional or punitive.

A practical structure looks like this:

1. Heading, Date, And Parties

• Date of letter
• Employee name and position
• Employer/business name
• Subject line (eg “First Written Warning – Inappropriate Workplace Behaviour”)

2. Reference The Meeting (And Support Person If Relevant)

Start by referring to the meeting where the issue was discussed:

• date and time of meeting
• who attended
• that the employee was given an opportunity to respond

This helps show procedural fairness.

3. Describe The Behaviour (Specific And Evidence-Based)

This is the heart of the warning letter. Include:

• what happened (behaviour, words used, actions)
• when and where it happened
• who was involved (names where appropriate)
• impact (on colleagues, customers, safety, productivity)

Avoid loaded language like “you are toxic” or “you are a bully”. Instead, describe the conduct and its impact.

4. Identify The Standard Or Policy Breached

Connect the behaviour to a clear standard, for example:

• your code of conduct (respectful communication)
• anti-bullying and harassment policy
• WHS procedures
• lawful and reasonable directions

If you collected personal information as part of looking into the incident (eg witness statements), make sure you handle and store it appropriately and consistently with your privacy obligations and internal processes.

5. State The Expected Improvement (Clear, Measurable, Timebound)

Don’t just say “be professional”. Spell out what you expect, such as:

• no swearing, yelling, or aggressive language at work
• communication with colleagues must remain respectful
• follow manager directions about customer interactions
• do not contact the complainant except for work-critical matters

Where possible, include a review date or timeframe (eg “We will review this matter in 4 weeks”).

6. Outline Support Or Next Steps

This could include:

• additional training or coaching
• re-issuing relevant policies
• additional supervision or check-ins
• Employee Assistance Program (if you offer one)

This isn’t about being “soft” - it’s about being practical and showing you’re trying to resolve the issue.

7. Explain Consequences If Behaviour Continues

Your letter should clearly state that if inappropriate behaviour continues, further disciplinary action may occur, including termination of employment.

Be careful not to promise a particular outcome (eg “you will be terminated if this happens again”), because circumstances differ. But you can and should flag that termination is a possible consequence.

8. Confirm Record Keeping And Acknowledgement

State that:

• the letter will be placed on the employee’s personnel file, and
• the employee should sign and return the letter as acknowledgment (not necessarily agreement).

If the employee refuses to sign, note that you can still keep the letter and record that it was provided.

What To Include (And What To Avoid) So Your Warning Letter Holds Up

Small details matter. A warning letter is often reviewed later during a dispute, an internal escalation, or a Fair Work process. Here’s how to keep it solid.

What To Include

• Dates, times, and locations of incidents.
• What was observed or reported, stated as fact (and if it’s an allegation, label it as an allegation).
• The employee’s response (briefly and fairly summarised).
• The workplace standard breached (policy, direction, or conduct expectation).
• Clear expectations going forward and a review timeframe.
• Consequences if behaviour repeats or fails to improve.

What To Avoid

• Vague claims like “you have a bad attitude” without examples.
• Emotional language (anger, sarcasm, personal attacks).
• Legal conclusions you can’t support (eg “you committed harassment”) without an investigation outcome.
• Threatening statements that lock you in (eg automatic termination, guaranteed outcomes).
• Including irrelevant history that makes the letter look biased or retaliatory.

If you’re escalating towards termination, it’s especially important that your warning history and correspondence is consistent. Many businesses also use a formal “show cause” step when considering serious outcomes, similar to the approach used in show cause letters.

A Practical Warning Letter Template Outline (With Example Wording)

Below is a practical outline you can adapt. It’s not a one-size-fits-all template (the right wording depends on what happened), but it will help you structure your letter in a way that is clear and business-appropriate.

Subject: Written Warning – Inappropriate Workplace Behaviour

Date:

To:

Dear ,

This letter confirms the outcome of our meeting on attended by . The purpose of that meeting was to discuss concerns about your workplace behaviour and to provide you with an opportunity to respond.

Behaviour of concern
On at approximately , at , it was reported/observed that you . This conduct involved , and it impacted by .

During the meeting, you stated that . We have considered your response.

Expected workplace standards
Your conduct does not meet the standard of behaviour required at work. In particular, it is inconsistent with our expectation that employees .

Required improvement
Effective immediately, you are required to:

We will review your conduct and compliance with these expectations on or around .

Support
To assist you in meeting these standards, we will .

Consequences
This letter constitutes a written warning. If your behaviour does not improve or if further inappropriate conduct occurs, we may take further disciplinary action, which may include termination of your employment.

Please sign and return a copy of this letter as acknowledgement that you have received it.

Sincerely,

Should You Call It A “First Warning” Or “Final Warning”?

This depends on severity and history. If it’s the first time the issue has occurred and it’s not extremely serious, a first written warning is common. If there’s a pattern of similar misconduct, or if the conduct is serious (but not immediate dismissal territory), you may consider a final warning.

Where the risk is higher, it’s worth checking whether you’re following a defensible termination pathway. A common related issue employers ask about is whether and how termination during probation changes the process, and the practical risks are explored in termination of employment during probation.

Managing The Process After The Warning Letter: Meetings, Records, And Next Steps

A warning letter isn’t just a document - it’s part of a process. How you handle the follow-up matters.

Hold A Proper Meeting (Don’t Just Email The Letter)

For most situations, it’s better to meet with the employee, talk through the concerns, and then provide the letter after the discussion (or shortly after). This reduces misunderstandings and gives the employee a real opportunity to respond.

Keep Detailed Records

Keep copies of:

• the complaint (if any)
• witness statements or notes
• meeting notes (including who attended and what was discussed)
• the warning letter and any response

Good record-keeping is often what makes the difference between a manageable HR issue and a drawn-out dispute.

Be Consistent Across Your Team

Inconsistent discipline is one of the fastest ways to create risk. If two employees behave similarly but only one is warned, you may be exposed to claims that the decision was unfair or discriminatory.

This is where having standardised contracts and policies helps. If your team documentation is patchy, consider tightening it up with a tailored Workplace Policy framework so behavioural expectations are consistent and easy to enforce.

Consider Whether Further Steps Are Needed

After issuing a warning letter, your next steps might include:

• a follow-up meeting to check progress
• mediation or facilitated discussions (where appropriate)
• additional training
• a performance improvement plan (if the issue overlaps with performance)
• escalation to a final warning or termination (if misconduct continues)

If the matter escalates to termination, the wording in your earlier warnings matters. Sometimes employers also want to explore options like payment in lieu of notice. If that’s on your radar, payment in lieu of notice is a useful concept to understand in the broader termination process.

Key Takeaways

• A well-drafted warning letter for inappropriate behaviour helps you address misconduct early, set expectations, and document the steps you’ve taken as an employer.
• Before issuing a warning, clarify what happened, check your policies/contracts, and ensure the employee has had a chance to respond.
• Your warning letter should be factual, specific, and linked to workplace standards, with clear expectations and a timeframe for improvement.
• Avoid vague or emotional language, and don’t overstate allegations you can’t substantiate.
• The warning letter works best as part of a consistent process, supported by proper record-keeping and clear workplace documentation.

If you’d like help preparing a warning letter, reviewing your disciplinary process, or putting the right employment documents in place, reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.