Suspected Fraudulent Medical Certificate? Steps for Australian Employers

Managing sick leave is a normal part of running a business. Most of the time, you’ll receive a medical certificate, you’ll record the leave, and you’ll move on.

But sometimes, things don’t feel right.

If you suspect a medical certificate might be fraudulent (or that the certificate doesn’t genuinely support the absence), it can put you in a difficult spot. On the one hand, you need to protect your business from misconduct, rostering gaps, and wage costs that shouldn’t have been incurred. On the other, you need to handle the situation carefully to avoid unfair dismissal, adverse action claims, privacy issues, and discrimination risks.

Below, we walk you through a practical, employer-focused approach to dealing with a suspected fraudulent medical certificate in Australia, including what you can ask, what you should document, and how to respond in a fair and legally defensible way.

What Counts As A “Fraudulent Medical Certificate” In Australia?

A fraudulent medical certificate generally means a certificate that is not genuine, has been altered, or has been obtained dishonestly.

In practice, employers tend to suspect fraud where:

• The certificate looks edited or inconsistent (different fonts, misaligned details, missing provider details).
• The employee’s story changes, or the certificate doesn’t match what they told you.
• There’s a pattern (eg repeated sick leave always attached to long weekends or busy shifts).
• You receive information suggesting the employee was working elsewhere or socialising while “unfit for work”.
• The employee refuses to provide any further reasonable information after being asked.

It’s also worth separating two issues that often get lumped together:

• Is the certificate genuine? (eg forged, altered, issued by someone who didn’t examine the person, or otherwise invalid)
• Does the certificate justify the absence? (eg it’s vague, doesn’t cover the dates, or doesn’t clearly indicate unfitness for work)

Both can be problematic for employers, but they may require different responses.

Is It Automatically “Fraud” If Someone Is Seen Out While On Sick Leave?

Not necessarily.

Being unfit for work doesn’t always mean someone is housebound. For example, someone may still be able to pick up groceries, attend a pharmacy, or go to a medical appointment. Even a social appearance isn’t conclusive by itself.

This is why it’s important to focus on evidence, process, and fairness rather than jumping straight to discipline.

Why You Need To Handle Suspected Fraud Carefully

When you suspect a fraudulent medical certificate, it’s tempting to move quickly-especially if you’re short-staffed, frustrated, or seeing repeated patterns.

However, acting too quickly can create serious legal risks, including:

• Unfair dismissal claims (if you terminate without a valid reason and a fair process).
• General protections (adverse action) claims (if an employee argues they were treated adversely because they took a workplace right like personal/carer’s leave).
• Discrimination risks (if the issue overlaps with disability, pregnancy, or other protected attributes).
• Privacy and record-handling risks (medical information is sensitive, and mishandling it can escalate disputes quickly).

Even where you strongly suspect misconduct, the safest approach is to treat it like any other workplace issue: investigate, give the employee a chance to respond, and make a decision based on evidence.

Step-By-Step: What To Do If You Suspect A Fraudulent Medical Certificate

If you think you’ve been given a fraudulent medical certificate, a structured approach will help you protect your business while staying fair and compliant.

1) Check Your Leave Policies And Employment Documents First

Before you take action, check what your employment contract and workplace policies say about sick leave evidence, notice requirements, and misconduct.

If your documentation is unclear, inconsistent, or outdated, it can make the process harder than it needs to be. Many businesses reduce risk by making sure their Employment Contract and policies set expectations about:

• when evidence can be required;
• what type of evidence is acceptable;
• timeframes for providing certificates; and
• what happens if evidence is not provided or is suspected to be false.

If you don’t have clear internal rules, you can still manage the issue, but you’ll need to be extra careful that your requests are reasonable and consistent.

2) Review The Certificate Objectively (Dates, Details, Coverage)

Start with the basics:

• Does the certificate cover the correct dates?
• Does it clearly state the employee is unfit for work (or requires modified duties)?
• Is the provider identifiable (name, provider number, clinic details)?
• Does it look altered (different formatting, overwritten dates, mismatched logos)?

Sometimes the issue isn’t “fraud” at all-it’s that the certificate is incomplete or doesn’t cover the absence. In those cases, the appropriate step may simply be to request further evidence.

3) Gather Information, But Don’t “Investigate” In A Way That Breaches Trust Or Privacy

It’s reasonable to gather relevant information, such as roster records, prior leave patterns, and internal communications.

But be careful about surveillance-style approaches, workplace gossip, or asking other employees to “keep an eye” on someone. Those tactics can create their own legal and cultural problems.

If the suspicion involves alleged misconduct outside work (eg the employee was allegedly working another job while on leave), you still need to ensure your information-gathering is proportionate, lawful, and connected to the employment relationship.

4) Ask For Clarification In Writing (And Keep Your Tone Neutral)

If something doesn’t add up, you can ask the employee for clarification.

This is often the most important moment to stay calm and professional. A good approach is to:

• outline what you’ve received (the dates and details of the certificate);
• state what aspect is unclear or inconsistent;
• ask for a response by a reasonable deadline; and
• invite them to provide any additional information or corrected evidence.

Avoid accusations at this stage. “Fraud” is a serious allegation, and you want to keep the discussion focused on facts and process.

5) Consider Whether You Need A Medical Clearance Or Further Evidence

Depending on the situation, it may be reasonable to request further medical information, particularly if:

• the absence is extended;
• the employee is returning to safety-critical work; or
• the certificate is vague and doesn’t clearly confirm capacity.

This can overlap with your work health and safety duties, but you should still be careful about over-collecting medical information.

In many businesses, a practical next step is requesting a fitness-for-work confirmation or “return to work” clearance where appropriate. If you’re unsure what you can reasonably ask for, medical clearance rules are a good place to start before you send the request.

6) If Misconduct Is Suspected, Run A Fair Investigation Process

If the explanation doesn’t resolve your concerns, treat the matter as potential misconduct and follow a fair investigation process. This typically includes:

• telling the employee what the concern is (in enough detail that they can respond);
• giving them a genuine opportunity to respond;
• considering their response objectively; and
• making a decision based on evidence, not assumptions.

If the situation is serious and you believe the employee’s continued attendance at work could create a safety risk or interfere with the investigation, you might consider directing them not to attend work temporarily while you investigate (often called a suspension on pay or administrative leave).

This step needs to be handled carefully, including whether your contract/policy supports it, how long it lasts, and how you communicate it. “Stand down” has a specific and limited legal meaning in Australia and is not a general-purpose tool for investigations, so it’s worth checking the legal framework before you act, including around standing down an employee pending investigation.

Can You Verify A Medical Certificate With The Doctor Or Clinic?

This is a common question, especially where the certificate looks suspicious.

As an employer, you generally need to be cautious here. Medical information is sensitive, and clinics will often not confirm anything without the employee’s consent (and even with consent, they may limit what they will say). Contacting a clinic can also create privacy and confidentiality concerns if it’s handled poorly.

That said, in some situations it may be reasonable to take steps to verify limited details-particularly the authenticity of the document-rather than seeking diagnosis or medical history.

What You Can Usually Ask (In A Limited Way)

Depending on the circumstances, you may be able to ask the employee to:

• confirm the certificate was issued by the provider listed;
• provide a clearer copy if the document is unreadable; or
• provide written consent for you to contact the provider to confirm authenticity (not medical details).

Even then, keep the scope narrow. You’re generally not entitled to ask for detailed diagnosis information unless there’s a lawful and reasonable basis (eg capacity-related issues for safe duties).

A Practical Middle Ground: Ask The Employee To Return To The Provider

Often, the simplest approach is to ask the employee to go back to the medical practice and request:

• a reissued certificate (if the original was unclear); or
• written confirmation of the certificate details.

This helps you avoid direct contact with a provider while still addressing authenticity concerns.

What Are Your Options If You Confirm The Medical Certificate Is Fraudulent?

If you reach a point where you have a reasonable basis to conclude the employee has provided a fraudulent medical certificate, you can usually treat it as misconduct (and sometimes serious misconduct), depending on severity and context.

Your options typically include:

• Counselling or a formal warning (where the conduct is less severe or there are mitigating factors).
• Direction to comply with sick leave evidence requirements moving forward (eg stricter timeframes for providing evidence).
• Disciplinary action up to termination (particularly where dishonesty is proven and trust is damaged).
• Non-payment of the leave (if the employee hasn’t met the evidentiary requirements for paid personal leave).

What’s “appropriate” depends on factors like:

• the employee’s role (is it a trust-heavy role?);
• the length and impact of the absence;
• whether the conduct was deliberate;
• their employment history and prior warnings; and
• your workplace policies and past practice (consistency matters).

If you’re considering termination, also remember that notice and final pay obligations can be complex. In some cases, employers use payment in lieu of notice as part of an exit approach (where it’s applicable), but it’s not a one-size-fits-all solution-particularly if you’re treating the matter as serious misconduct.

Do You Need To Issue A “Show Cause” Letter?

In higher-risk situations, a “show cause” process can help demonstrate procedural fairness. This is where you set out the allegations and evidence, and invite the employee to respond before any decision is made.

If you’re heading towards a serious disciplinary outcome, a Show Cause Letter can be a useful step to slow things down, document your reasoning, and ensure the employee has a real opportunity to respond.

How To Reduce The Risk Of Fraudulent Medical Certificates In Your Business

You can’t eliminate sick leave misuse entirely, but you can reduce the risk (and reduce disputes) by setting clear expectations and managing sick leave consistently.

Set Clear Rules On Evidence And Notice Requirements

Your workplace should clearly cover:

• how soon an employee must notify you they’re unwell;
• when you require evidence (eg after 1 day, or for specific patterns);
• what evidence is acceptable; and
• what happens if evidence is late, incomplete, or questionable.

Clarity upfront often prevents conflict later.

Be Consistent (And Document Your Decisions)

Inconsistency is one of the biggest risk factors in employee disputes.

If you enforce strict rules for one employee but not for others, you increase the risk of complaints (including general protections claims). Even if the underlying suspicion is valid, inconsistent handling can undermine your position.

A simple habit that helps: keep a written record of sick leave requests, evidence received, what you asked for, and what you decided.

Train Managers On How To Handle Sick Leave Conversations

Managers don’t need to become legal experts, but they should understand:

• how to request evidence respectfully;
• what questions are inappropriate (eg probing for diagnosis); and
• when to escalate concerns to HR or external advisors.

Many issues escalate because of tone or poor messaging, not because the employer’s underlying concern was unreasonable.

Check Your Rostering Practices (So You’re Not Accidentally Creating Patterns)

Sometimes employees call in sick more often when rosters feel unpredictable or when shift changes are communicated late.

If you rely on casuals or shift workers, tightening your internal rules around shift management may reduce conflict more broadly. It can help to align your approach with best practice around employee rostering and ensure your team knows what to expect.

Key Takeaways

• A suspected fraudulent medical certificate should be treated as a workplace process issue first: check the facts, document your steps, and avoid jumping to conclusions.
• Not every suspicious situation equals fraud-sometimes a certificate is simply incomplete, unclear, or doesn’t cover the relevant dates.
• If concerns remain, a fair investigation process (including a chance for the employee to respond) is essential to reduce legal risk.
• Be cautious about contacting medical providers directly; it’s often safer to request clarification or the employee’s consent and keep any verification narrowly focused.
• If dishonesty is proven, your response can range from warnings through to termination, depending on severity, evidence, and procedural fairness.
• Clear contracts, policies, manager training, and consistent recordkeeping are your best long-term tools for managing sick leave evidence and reducing disputes.

If you’d like help handling a suspected fraudulent medical certificate or reviewing your sick leave processes and employment documents, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.