Can An Employer Ask For A Medical Certificate?

Priya runs a busy cafe in Wellington. One of her team texts at 6.30am saying they're sick and can't come in. It's the third short-notice absence this month, and Priya isn't sure whether she can ask for a medical certificate without overstepping.

If you've been in this position, you're not alone. Sick leave can be tricky because you're balancing staffing, fairness, privacy and your obligations under New Zealand employment law.

The medical certificate rules for sick leave in NZ are manageable once you know the timing, cost and privacy rules. The key is to ask clearly, consistently and only for the evidence you actually need.

Can An Employer Ask For A Medical Certificate For Sick Leave?

Yes, you can ask an employee for proof of sickness or injury when they take sick leave, but the rules depend on how long they've been away.

Under the Holidays Act 2003, employees who qualify for sick leave can use it when they, their spouse or partner, or a person who depends on them for care is sick or injured. Eligible employees get 10 days of paid sick leave each year. Unused sick leave can generally carry over up to a maximum of 20 days, unless you've agreed to more.

For evidence, the main rules are:

• Three or more consecutive calendar days: you can require proof of sickness or injury. You should tell the employee as early as possible that proof is required.
• Fewer than three consecutive calendar days: you can still require proof, but you must tell the employee as early as possible and agree to meet their reasonable costs of getting that proof.

Consecutive calendar days means calendar days, not just rostered working days. So weekends and public holidays can count if the sickness runs across those days.

You should also keep the Employment Relations Act 2000 in mind. Your approach needs to be fair, consistent and in good faith. A medical certificate request should be about managing sick leave properly, not punishing someone for being unwell.

Can You Ask For A Medical Certificate After One Day?

Yes, you can ask for a medical certificate after one day of sick leave, but you need to pay the employee's reasonable costs of getting it.

This is the part many employers miss. If the absence is less than three consecutive calendar days and you require proof, the Holidays Act says you must agree to meet the employee's reasonable expenses. That usually means the cost of the appointment or certificate, and sometimes reasonable travel costs if those are needed to get the evidence.

Here's a practical example.

Priya's cafe employee calls in sick on Monday and is rostered to work only that day. Priya can say:

Thanks for letting me know. Because we need to manage short-notice absences consistently, please provide medical evidence that you were unfit for work today. As this is for one day of sick leave, we'll reimburse your reasonable cost of getting that evidence. Please send through the receipt.

If the appointment costs $65, Priya should reimburse that reasonable cost promptly once the employee provides the receipt. If Priya doesn't agree to pay the reasonable cost, she may struggle to rely on the failure to provide a certificate for a one-day absence.

Be careful with blanket rules like medical certificate required for every sick day at your own cost. That kind of clause can conflict with the Holidays Act for absences under three consecutive calendar days.

What Counts As Proof Of Sickness In New Zealand?

Proof doesn't always have to contain a diagnosis, but it should confirm enough for you to manage the absence.

A medical certificate is the most common form of proof. It might come from a GP, nurse practitioner, registered health practitioner or a legitimate telehealth provider. Depending on the situation, other evidence may also be appropriate, but your policy should be clear about what your business will usually accept.

For most everyday sick leave situations, the evidence should cover:

• the employee's name
• the date the employee was assessed, where relevant
• whether the employee was unfit for work
• the period the employee was unfit for work
• any work restrictions you need to know about, such as avoiding heavy lifting for a short time

You usually don't need to know the employee's diagnosis. For example, unfit for work from 3 June to 5 June is normally enough. Asking for details like medication, test results or the exact condition can create privacy risk unless there's a clear work-related reason.

It's also worth separating two issues:

• Proof of sickness for paid sick leave: this is about confirming the employee was entitled to take sick leave.
• Medical clearance or a medical examination: this is about fitness to work, safety or return-to-work issues and involves extra considerations.

If your concern is workplace safety or whether someone can safely return, treat that as a separate process rather than stretching an ordinary sick leave certificate request too far.

Who Pays For The Medical Certificate?

You pay when you require proof for an absence of fewer than three consecutive calendar days. For three or more consecutive calendar days, the employee usually covers the cost unless your employment agreement or policy says otherwise.

The cost rule is one of the most practical parts of sick leave management. If you're asking for evidence after one day or two days, make the payment position clear at the same time as the request. Don't leave the employee guessing.

A simple process could look like this:

1. Ask early: request proof as soon as you reasonably can, preferably while the employee is still away.
2. Confirm the cost position: say whether you'll reimburse reasonable expenses because the absence is under three consecutive calendar days.
3. Ask for a receipt: this gives your payroll or accounts team a clean record.
4. Reimburse promptly: delays can make the request feel unfair and may undermine your process.
5. Record the sick leave correctly: keep payroll and leave records aligned with the certificate dates.

For a longer absence, you can say something like:

As your sick leave has now continued for three consecutive calendar days, please provide proof of sickness or injury covering your absence. The certificate doesn't need to include your diagnosis.

If your business wants to be more generous and pay certificate costs for all sick leave evidence, you can. Just make that clear in your policy so managers apply it consistently.

How Should You Handle Medical Information And Privacy?

You should treat medical certificates as sensitive personal information and only collect what your business genuinely needs.

The Privacy Act 2020 applies when you collect, store, use and share employee health information. In practice, this means you should be careful about who sees the certificate, what you ask for and how your employee privacy policy handles health information.

A good privacy approach is:

• Collect the minimum: ask for dates, fitness for work and any necessary restrictions, not a full medical history.
• Explain the purpose: tell the employee you need the evidence to assess sick leave and manage staffing or safety.
• Limit access: keep certificates with payroll, HR or the relevant manager only.
• Store securely: avoid leaving certificates in shared inboxes, open folders or printed piles near the roster.
• Don't gossip: managers shouldn't tell the wider team why someone is away.
• Keep records only as needed: align retention with your employment record practices and privacy obligations.

Sometimes managers ask for too much because they're frustrated by repeated absences. That can backfire. If you're worried about a pattern, focus on the pattern and your operational needs rather than trying to investigate the medical condition.

For example, you might say:

We've noticed several short-notice absences on Mondays. We want to make sure our leave records are accurate and rosters are covered, so we'll be asking for evidence for future sick leave absences in line with our policy and the Holidays Act.

That keeps the conversation focused on work, not the employee's private health details.

How Should Your Sick Leave Policy And Manager Scripts Work?

Your employment agreements and workplace policy should explain when you can ask for evidence, who pays and what managers should say.

This doesn't have to be complicated, but it does need to be tailored to your business. A cafe, a cleaning company and a software startup may all manage sick leave differently because their rostering, health and safety risks and remote work arrangements are different. Templates often miss these practical details.

Sick Leave Evidence Clause Outline

Before you use a clause, have it tailored for your business and checked against the Holidays Act, the Employment Relations Act and your payroll practices. A useful outline could cover:

1. Entitlement: state that eligible employees receive sick leave under the Holidays Act and any extra entitlement your business provides.
2. Notice: explain how and when employees should tell you they're sick, such as calling a manager before the shift starts.
3. Evidence For Three Or More Days: say you may require proof for three or more consecutive calendar days and will ask as early as possible.
4. Evidence For Shorter Absences: say you may require proof for shorter absences and will meet reasonable costs when the law requires it.
5. Acceptable Evidence: list the type of certificate or health practitioner evidence you'll usually accept.
6. Privacy: say you won't usually require a diagnosis and will handle health information confidentially.
7. Patterns Or Concerns: explain that repeated absences may be managed through a fair employment process.

Manager Scripts That Keep Things Calm

Managers often get into trouble because they improvise. Give them short scripts they can use consistently.

• For one day: Thanks for letting me know. Please provide evidence that you were unfit for work today. Because this is under three consecutive calendar days, we'll reimburse your reasonable cost of getting that evidence.
• For three or more days: As your absence has continued for three consecutive calendar days, please provide proof of sickness or injury covering the period you're away.
• For privacy: The certificate doesn't need to state your diagnosis. We just need the dates and whether you were unfit for work or have any work restrictions.

A clear script protects your business and helps your managers sound fair, not suspicious.

Key Takeaways

• You can ask for proof of sickness or injury for sick leave, but the rules depend on the length of the absence.
• For three or more consecutive calendar days, you can require proof and should ask as early as possible.
• For one or two days, you can require proof, but you must agree to pay the employee's reasonable costs of getting it.
• A medical certificate usually doesn't need to include a diagnosis. Dates, fitness for work and necessary restrictions are usually enough.
• Medical information should be handled carefully under the Privacy Act 2020, with limited access and secure storage.
• Your sick leave clause, policy and manager scripts should match the Holidays Act and the way your business actually operates.

If you'd like help with your sick leave clauses, workplace policies, manager scripts or employment agreement updates, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.