Do You Need a Certificate for Sick Leave?

You wake up feeling terrible, text your boss, and get a reply: "Can you get a doctor's certificate?" Is that actually allowed? For a single day off? The answer is: it depends — and knowing the rules saves you both awkward conversations and unnecessary GP visits.

Here's what Australian law actually says about sick leave evidence, when your employer can require a certificate, and how to get one quickly if you need it.

The Short Answer

Under the Fair Work Act, employees can take paid personal (sick) leave when they're unfit for work because of illness or injury. Your employer can ask for evidence that would satisfy a reasonable person — which includes a medical certificate, but doesn't automatically mean a certificate is required for every absence.

• For longer absences (typically more than a day or two), a medical certificate is the standard expectation
• For a single day off, your employer can still ask for evidence — but it needs to be reasonable in the circumstances. A statutory declaration is one alternative form of evidence
• Employers can't demand unreasonable things — like a certificate for every hour you're late, or evidence that discloses your private diagnosis

What "reasonable" means in practice depends on your workplace policy, industry, and the pattern of your absences. Check your award, enterprise agreement or employment contract — many spell out exactly when evidence is required.

When Can Your Employer Ask for a Certificate?

Employers are generally on solid ground asking for a medical certificate when:

• The absence is longer than a day or two — the longer the absence, the more reasonable a certificate request becomes
• There's a pattern of short-notice absences — for example, frequent Fridays or days around public holidays
• It's required by your workplace policy, award or agreement — many workplaces require certificates for any sick day
• It's around critical periods — like the lead-up to a major deadline, though policies should be applied consistently
• Safety-critical roles — where being unfit for duty genuinely affects safety (drivers, healthcare workers, heavy machinery)

If you're asked to provide a certificate, your employer generally can't insist it details your diagnosis — a certificate simply needs to confirm you were unfit for work on the stated dates.

What If You're Too Sick to See a Doctor?

This is where most people get stuck: you're in bed with flu, and the last thing you can manage is a trip to a clinic. Options:

• Telehealth: a phone or video consultation with an AHPRA-registered GP — no travel required. If the doctor confirms you're unfit for work, a certificate can be issued and emailed to you
• Statutory declaration: for short absences, you can sign a stat dec (witnessed) as evidence — some employers accept this, especially for single days
• Ask about timing: if you genuinely can't get evidence in time, let your employer know when you'll provide it

How to Get a Certificate Online: 3 Steps

1. Book a telehealth GP: Book online — same-day phone or video appointments with AHPRA-registered doctors.
2. Have a real consultation: The GP will assess your symptoms and whether you're unfit for work. Certificates are issued following a genuine consultation — never without one.
3. Receive your certificate: Your digital certificate (from $15) is emailed to you — forward it to your employer and rest up.

What a Certificate Must (and Mustn't) Include

• Must: be issued by a registered practitioner, name the patient, state the dates the person was unfit for work, and be dated and signed
• Mustn't: disclose your specific diagnosis or private medical details — you're not required to share that with your employer
• Backdating: certificates should reflect a genuine assessment. If you were too sick to see a doctor on day one, see one as soon as you can — a GP can assess your current state and history, but certificates can't simply be backdated to cover days that were never assessed

Caring for a sick child or family member instead? That's a different leave type — see our guide to carer's leave certificates.