When Can Employers Request a Medical Certificate?

Managing sick leave is one of those everyday employment issues that can quickly turn into a bigger problem if you don’t handle it consistently.

On the one hand, you want to support your team when they’re genuinely unwell. On the other hand, you also need a business that can roster properly, stay productive and manage payroll with confidence.

That’s why so many employers ask: when is a medical certificate required?

Note: This article is general information for Australian employers and isn’t legal advice. Your obligations can vary depending on your Modern Award, Enterprise Agreement, employment contract and the specific circumstances.

In this guide, we’ll walk you through what Australian workplace law generally requires, what you can (and can’t) ask for as an employer, and how to set a practical approach that works for a small business.

Why Medical Certificates Become A Business Issue (Not Just A HR Issue)

From a small business perspective, the medical certificate question is rarely just about paperwork. It’s usually about:

• planning and coverage (especially for shift-based businesses)
• payroll accuracy (paid personal/carer’s leave vs unpaid leave)
• fairness and consistency across the team
• managing patterns of absenteeism without making assumptions
• protecting your business if a dispute is raised later (e.g. about unpaid leave or performance management)

The goal isn’t to “catch people out”. It’s to have a clear, lawful process for when evidence is needed and what evidence is acceptable.

Having the right foundations in place (including a well-drafted Employment Contract and workplace policies) can make these conversations much easier and less emotional.

What The Law Says About Sick Leave Evidence In Australia

In Australia, paid personal/carer’s leave entitlements for full-time and part-time employees come from the National Employment Standards (NES) under the Fair Work Act 2009 (Cth).

One key point for employers is this: if you request it, an employee is generally required to give you evidence that would satisfy a reasonable person.

So, the law doesn’t set a single universal rule like “a certificate is required after 2 days” or “a certificate is required for every absence”. Instead, the focus is:

• Have you asked for evidence?
• Is the request reasonable in the circumstances?
• Is the evidence provided something that would satisfy a reasonable person?

Modern Awards And Enterprise Agreements Can Add Extra Rules

Many small businesses are covered by a Modern Award, and some workplaces operate under an Enterprise Agreement. These instruments can include specific processes about:

• when notice of absence must be given
• what type of evidence is acceptable
• how quickly evidence must be provided

Practically, this means your “medical certificate rule” should not be a one-size-fits-all approach copied from somewhere else. It needs to align with your legal obligations and your workplace setup.

Casual Employees Are A Different Category

Casual employees generally don’t receive paid personal/carer’s leave under the NES (with some exceptions in specific circumstances or where an Enterprise Agreement provides it). However, they may still need time off due to illness, and you may still need to manage rostering and reliability in a fair way.

If you’re dealing with a casual workforce, it’s still worth setting clear expectations about notice and evidence, but you should be careful not to treat “being sick” as misconduct. It’s also important to avoid any action that could look like you’re penalising someone for exercising a workplace right (for example, taking personal/carer’s leave where they’re entitled to it).

How Many Sick Days Before You Need A Doctor’s Certificate?

This is one of the most searched questions employers ask: how many sick days before you need a doctor’s certificate?

The practical answer is: it depends - but you can set a clear business rule, as long as it’s consistent with the NES, any applicable Award/Agreement, and applied fairly.

In many workplaces, common approaches include:

• Evidence required for 2 or more consecutive days of sick leave
• Evidence required for single days that fall immediately before or after a weekend/public holiday (often called “adjacent days”)
• Evidence required for any sick leave during a probation period (this can be appropriate in some workplaces, but should still be reasonable in the circumstances and consistent with any Award/Agreement)
• Evidence required when there’s a pattern (e.g. repeated Mondays) and you have a reasonable basis to request it

Even if your policy says “we require a medical certificate after one day”, it’s still worth considering whether that approach is likely to be viewed as reasonable in your workplace context (and whether it aligns with any applicable Award/Agreement terms).

For example, in a very small team where one absence shuts down operations, requiring evidence more often may be easier to justify than in a larger workplace where coverage is simple.

It’s also worth remembering that people can be genuinely unwell for short periods and may not be able to access an appointment quickly. Some businesses allow alternative evidence in those cases (more on that below).

If you want a deeper view on evidence-free absences, it can help to understand the common scenarios around sick days without a certificate and how to manage them without creating conflict.

When Can An Employer Request A Medical Certificate? Common Scenarios

Another key question small businesses ask is: when can an employer request a medical certificate?

In practice, there are a few higher-risk scenarios where requesting evidence is more likely to be reasonable, especially if your request is consistent with your policy, consistent with any Award/Agreement obligations, and applied consistently across the team.

1. Longer Or Consecutive Absences

If an employee is off sick for multiple days in a row, it’s often reasonable to request evidence. This is because:

• the payroll impact is higher (paid leave)
• the operational impact is higher (coverage and productivity)
• there may be WHS considerations if they return too soon

2. Absences Around Public Holidays Or Weekends

If an employee regularly calls in sick on days attached to long weekends, it may be reasonable to ask for evidence.

The key is consistency. If you only request evidence from one person (and not others in the same situation), you increase the risk of allegations of unfairness, discrimination or adverse action.

3. Patterns Of Absence That Affect The Business

If there’s a clear pattern that is impacting operations (for example, repeated absences on the same weekday, or frequent single-day absences with minimal notice), you can consider requesting evidence.

That said, be cautious about jumping straight to discipline. A better first step is often a neutral conversation along the lines of:

• confirming expectations about notice
• asking if there’s an underlying issue you should be aware of
• explaining that you’ll need evidence going forward for certain absences

4. When The Employee Is Under A Return-To-Work Plan Or Medical Restrictions

If an employee has been unwell or injured and there are concerns about their capacity to safely perform their role, you may need more than a standard medical certificate.

This is where medical clearance and fitness-for-work information can be relevant, particularly if the role has safety-critical elements (e.g. operating machinery, driving, working at heights).

When you’re seeking information about capacity or restrictions, it’s generally best to focus on what you need to meet your safety and operational obligations (for example, whether the employee is fit to perform the inherent requirements, and whether any adjustments are needed) rather than asking for a diagnosis.

A practical starting point is understanding when you can ask for medical clearance to return to work, and how to do it in a way that respects privacy while protecting your WHS duties.

5. Elective Surgery And Planned Procedures

Sometimes a “sick leave request” is actually a planned absence due to elective surgery (or a treatment plan that’s been scheduled in advance). These situations can raise extra questions about notice, evidence and return-to-work requirements.

If this is common in your workplace, it can help to have a process for managing sick leave requests for elective surgery, so you’re not improvising each time.

What Counts As Acceptable Evidence (And What You Should Not Ask For)

When employers think “evidence”, they usually think “doctor’s certificate”. But under the Fair Work framework, the real test is whether the evidence would satisfy a reasonable person (and some Awards/Agreements may be more specific).

Medical Certificate Vs Statutory Declaration

A medical certificate is common and straightforward, but it’s not always the only option.

Depending on the situation, evidence could include:

• a medical certificate from a doctor
• other medical documentation (for example, from a treating practitioner)
• a statutory declaration (in some circumstances)

If you choose to accept stat decs as an alternative (especially where access to a GP is difficult), it helps to understand what a stat dec should look like. Many employers find it useful to point staff to a basic process for a statutory declaration for sick leave so you receive consistent, usable information.

Be Careful About Privacy: You Usually Don’t Need The Diagnosis

One common mistake is asking employees to “prove” what illness they have.

In most cases, what you need to confirm is:

• the employee was unfit for work (or needed to care for someone)
• the dates they were unfit for work
• (if relevant) any restrictions on duties, or whether they’re fit to return

You generally should not require detailed medical information beyond what’s necessary for legitimate employment and safety purposes. If you collect or store medical information, treat it as sensitive, store it securely, and restrict access internally.

Timing: When Should The Evidence Be Provided?

Many employers set a rule that evidence must be provided “as soon as practicable” (for example, within a set number of days after returning to work). A rigid deadline can backfire if an employee can’t access an appointment in time.

A more practical approach is to:

• require the employee to notify you as early as possible that they’re unwell
• ask them to confirm when they expect to provide evidence
• reserve the right to treat the leave as unpaid if evidence isn’t provided within a reasonable timeframe (subject to the NES and any Award/Agreement requirements)

Whatever you choose, apply it consistently.

How To Set A Clear “Medical Certificate Required” Rule In Your Small Business

The simplest way to avoid confusion is to put your approach in writing and make sure your managers follow it the same way every time.

Step 1: Check Your Award/Agreement And Your Existing Contracts

Before you set any rule, confirm whether a Modern Award or Enterprise Agreement applies and whether it includes evidence requirements.

Also make sure your employment contracts and policies don’t contradict each other (for example, your contract says one thing, but your staff handbook says another).

Step 2: Decide Your “Default” Evidence Rule

Many small businesses adopt a default rule such as:

• Evidence is required for 2+ consecutive days of personal/carer’s leave; and
• Evidence may be required for single days where the absence is adjacent to a weekend/public holiday or where there is a pattern of absences.

This usually gives you enough coverage to manage risk, without creating a culture where every sniffle becomes an administrative battle.

Step 3: Spell Out What Evidence You’ll Accept

Be specific. For example:

• medical certificate
• statutory declaration (where appropriate)
• other evidence that would satisfy a reasonable person

This reduces back-and-forth and helps your team understand what’s expected.

Step 4: Build In A Consistent Process For Shift Workers

If you run a shift-based business, your process should also cover:

• how much notice is required for sick leave (where possible)
• who the employee must contact (manager, store phone, roster manager)
• what happens if the employee doesn’t attend and doesn’t notify anyone

Where rostering is a common issue, it’s also worth reviewing your broader shift management approach, including your shift cancellation policy, so you’re not dealing with last-minute changes inconsistently across the business.

Step 5: Train Managers On What They Can Say (And What They Should Avoid)

Even a good policy can be undermined by a manager who:

• demands private medical details
• makes comments implying disbelief (“you don’t look sick”)
• applies the rule to one employee but not another
• threatens termination or other consequences for taking leave

For small businesses, the practical fix is often simple: have a short internal script managers can use, like:

“Thanks for letting us know. Please send through a medical certificate or other evidence for today as soon as you can, consistent with our policy.”

Neutral, consistent, and easy to repeat.

Key Takeaways

• When is a medical certificate required? There isn’t one universal rule in Australia. Employers can request evidence for personal/carer’s leave, and the evidence must satisfy a reasonable person (taking into account the circumstances and any applicable Award/Agreement).
• The most practical approach is to set a clear policy (often evidence for 2+ consecutive days, and for certain single-day absences where reasonable) and apply it consistently.
• Modern Awards and Enterprise Agreements can include extra evidence requirements, so it’s important to check what applies to your business.
• Medical certificates aren’t always the only option - a statutory declaration or other reasonable evidence may be acceptable, depending on the circumstances and any applicable Award/Agreement terms.
• Be careful about privacy: you usually don’t need (and generally shouldn’t request) detailed medical information beyond what’s required to manage leave and safety.
• Clear contracts, policies and manager training help you manage sick leave fairly, reduce disputes, and keep your business running smoothly.

If you’d like help putting a practical sick leave and medical evidence process in place (including contracts and workplace policies), you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.