You may be wondering, “Are online sick certificates valid?” The short answer is yes. Online sick certificates are valid when they meet the standards set under the Fair Work Act 2009 and are issued by a registered health practitioner.
In this guide, we’ll explain what makes an online sick certificate valid, whether a certificate is legally required, and situations where an employer might question them. We’ll answer these questions from the perspective of both employees and employers, offering a clear reference for workers, managers, and HR teams.
A medical certificate is an official document issued by a registered healthcare practitioner. It confirms that a person is medically unfit to work or attend classes due to a minor illness or unexpected injury.
A certificate is not always required, but it is often requested. Employees are entitled to sick leave under the National Employment Standards (NES) laid out in the Fair Work Act 2009. Full-time employees accrue 10 days of paid sick leave per year, while part-time employees accrue a pro rata entitlement based on their ordinary hours of work.
According to the Fair Work Ombudsman, an employer can ask an employee to provide evidence that their leave was genuinely taken due to minor illness or unexpected injury. This can apply even to short absences of one day. The evidence must satisfy a reasonable person that the employee was genuinely unwell and unable to work.
So, while you may not always be asked for a certificate, your employer is within their rights to request one for sick leave. Having a valid sick certificate ready helps you fulfil those requirements and protects your paid leave entitlement.
There is no requirement under the Fair Work Act for a medical certificate to be issued via an in-person appointment. Instead, the focus is on whether the evidence would satisfy a reasonable person that the employee was genuinely unfit for work due to illness or injury.
A medical certificate issued after a telehealth assessment can be accepted in the same way as a certificate issued during an in-person consultation. The Fair Work Ombudsman recognises medical certificates as acceptable evidence and does not require the assessment to be conducted face-to-face.
Generally, employers do accept online sick certificates, provided they are issued following an assessment by a registered health practitioner and meet the Fair Work requirements for personal leave. That said, the question, “Do employers accept online sick certificates?” does not always have a straightforward answer.
In some cases, acceptance may depend on the requirements of the relevant award or workplace agreement, which may require a certificate from a specific type of registered health practitioner in some cases.
For HR teams, clear, consistent policies can help reduce confusion about leave evidence and documentation requirements. Employees, on the other hand, should check their award, enterprise agreement, and workplace policies before submitting a medical certificate.
Although medical certificates are widely accepted as evidence for personal leave, there are situations where an employer may have legitimate concerns about a certificate, including:
If you’d like to learn more about why an online medical certificate may be rejected, read our blog: “Top Reasons Why Online Sick Certificates Get Rejected”.

A medical certificate should contain several key details to support its validity, including:
When these details are included, the certificate is more likely to satisfy workplace requirements and be accepted as evidence for personal leave.
For employers and HR teams, the following considerations can help when assessing medical certificates:
So, are online sick certificates valid? The answer is yes, provided they are issued following an assessment by a registered health practitioner and contain sufficient information to satisfy a reasonable person that you were genuinely unfit for work due to minor illness or unexpected injury.
For workers, this means that a certificate obtained through a recognised telehealth service generally carries the same weight as one from a clinic. For HR teams, it means online certificates can fulfil existing policies as long as the practitioner and content requirements are met.