In Ontario, your employer can’t require a sick note from a qualified health practitioner as proof for the three job-protected sick days provided by the Employment Standards Act (ESA). This rule has applied since October 28, 2024. Employers can still ask for evidence that is reasonable in the circumstances, but they can’t require a certificate from a qualified health practitioner for these ESA sick days.
Most Ontario employees become entitled to up to three unpaid, job-protected sick days per calendar year after working for their employer for at least two consecutive weeks.
The sick-note rule is not a complete ban on medical documentation at work. Longer medical leaves, disability accommodation, return-to-work arrangements and some employer-provided paid sick plans can involve legitimate requests for medical information. The reason for the request matters.
On This Page:
- 1. Can Your Employer Ask for a Sick Note?
- 2. What Proof Can Your Employer Ask For?
- 3. When Medical Documentation Can Be Required
- 4. What Medical Information Can Your Employer Ask For?
- 5. Can Your Employer Challenge a Medical Note?
- 6. Discipline or Termination Over a Sick Note
- 7. What Employees Should Do
Can Your Employer Ask for a Sick Note in Ontario?
Not as proof for the three sick days protected by Ontario’s ESA. Since October 28, 2024, an employer can’t require a certificate from a qualified health practitioner to establish your entitlement to those days.
The change means an employee who is taking one of the ESA’s three statutory sick days doesn’t have to visit a doctor simply to obtain a medical certificate for the employer.
For the complete rules on eligibility, whether the days are paid and how the entitlement works, see our guide to sick days in Ontario.
What is a qualified health practitioner?
Ontario’s sick-leave restriction applies to certificates from qualified health practitioners covered by the ESA. The legislation’s health-practitioner framework includes professionals such as physicians, registered nurses and psychologists.
Does the rule apply if you take all three sick days separately?
Yes. The ESA provides up to three sick-leave days per calendar year; they don’t have to be taken consecutively. The medical-certificate restriction applies to an employee establishing entitlement to that statutory sick leave.
What Proof Can Your Employer Ask For Instead of a Sick Note?
Your employer can still ask for evidence that is reasonable in the circumstances to establish that you qualify for ESA sick leave. What is reasonable depends on the situation, but the employer can’t turn that request into a requirement for a prohibited certificate from a qualified health practitioner.
You should still tell your employer that you are unable to work because of illness, injury or a medical emergency and follow reasonable workplace procedures for reporting the absence.
The sick-note change does not give employees permission to disappear from work without communicating. It changes the proof an employer can demand for the statutory leave; it does not eliminate normal attendance-reporting obligations.
Can your employer require you to explain your illness?
You can be required to provide enough information to establish that your absence falls within the protected leave, but that does not automatically entitle your employer to your diagnosis or detailed medical history.
If the issue develops into a disability-accommodation request, the employer can ask for relevant information about your restrictions and needs. Medical privacy protections still matter, and requests should be limited to information genuinely needed to manage the accommodation.
When Can an Ontario Employer Still Require Medical Documentation?
Medical documentation can still be required when the request relates to a legal or workplace process other than the ESA’s three statutory sick days.
Long-term illness leave
Ontario’s long-term illness leave requires a certificate from a qualified health practitioner.
Since June 19, 2025, eligible employees who have worked for their employer for at least 13 consecutive weeks can take up to 27 weeks of unpaid, job-protected leave in a 52-week period when they are unable to work because of a serious medical condition. The statutory leave requires a health-practitioner certificate supporting the serious medical condition and period during which the employee will be unable to work.
Read our guide to long-term illness leave in Ontario for the full entitlement.
Disability accommodation
If you need your job changed because of a disability, your employer can request reasonable medical information needed to understand your restrictions and accommodation needs.
That can arise when you need modified hours, different duties, a gradual return to work, time away from work or another disability-related adjustment. Employees requesting accommodation also have a responsibility to participate in the process and provide relevant information about their restrictions.
Learn more about the duty to accommodate in Ontario and modified duties in Ontario.
Return-to-work information
An employer can seek reasonable medical information when it needs to understand whether you can safely perform your essential job duties and whether restrictions apply when you return. The focus should be on your functional abilities and accommodation needs, not unnecessary medical details.
Employer-provided paid sick days
A workplace paid-sick-leave plan can have different documentation rules if it provides a greater right or benefit than the ESA’s minimum sick-leave standard.
Ontario’s ESA guidance confirms that an employment contract can provide a greater sick-leave right or benefit. The government’s policy manual also recognizes that an employer is not necessarily prohibited from requiring medical documentation as a condition of receiving additional paid sick-leave benefits.
What Medical Information Can Your Employer Ask For?
Your employer is usually entitled to information about your workplace limitations and accommodation needs—not your entire medical file.
In a disability-accommodation process, reasonable medical information can include:
- Confirmation that you have a disability
- Your functional restrictions or limitations
- Whether you can perform the essential duties of your job with or without accommodation
- The type of accommodation you require
- Your expected return-to-work timing if you are away
- Updated information where your restrictions or recovery period change
The Ontario Human Rights Commission says employers must limit medical-information requests to what is reasonably related to the limitation or restriction and should seek the least intrusive information needed to make an accommodation decision.
Does your employer have the right to know your diagnosis?
Usually, no. An employer generally does not have the right to know the cause of your disability, your diagnosis, symptoms or treatment simply because you need accommodation.
More detailed information can be justified where your needs are genuinely complex, unclear or difficult to assess. Even then, the employer must be able to explain why the additional information is necessary.
Who pays for medical documentation required for accommodation?
Where an employer requires medical information as part of the disability-accommodation process, Ontario Human Rights Commission guidance states that the accommodation provider should bear the cost of the required medical documentation.
Can Your Employer Challenge a Doctor’s Note or Ask for More Information?
Your employer can’t simply disregard legitimate medical information because it disagrees with your health-care provider, but it can ask for reasonable clarification when the information is genuinely insufficient or unclear.
For example, a note that merely says “off work indefinitely” might not provide enough information to manage a long-term accommodation. The employer can seek relevant information about expected duration, restrictions and the employee’s ability to perform essential duties.
That does not give the employer unlimited access to confidential health information. The request must remain connected to the legitimate workplace issue being addressed.
Can your employer demand a second medical opinion?
Not simply to second-guess your own health-care provider. The Ontario Human Rights Commission says expert opinions should be obtained where needed, not as a routine matter, and an independent medical examination should not be used merely to challenge an accommodation request.
If the medical information is contradictory, unreliable or genuinely inadequate to assess a complex accommodation, further medical information can be justified. An employee also has an obligation to participate reasonably in the accommodation process.
Can You Be Disciplined or Fired for Not Providing a Sick Note?
Your employer can’t lawfully punish you for refusing to provide a qualified-health-practitioner certificate that the ESA says it cannot require for your statutory sick leave. The ESA prohibits reprisals against employees for exercising protected employment-standards rights.
If your employer disciplines you, cuts your shifts, threatens you or terminates you because you properly took protected sick leave, the employer’s response can raise an ESA reprisal issue.
See our guide to being fired for calling in sick in Ontario.
What if your illness is also a disability?
If your medical condition amounts to a disability, your employer also has obligations under Ontario’s Human Rights Code. Employers must accommodate disability-related needs to the point of undue hardship and can’t discriminate in discipline, dismissal or return-to-work decisions because of disability.
The protection is broader than the ESA’s three sick days. A disability does not stop every lawful termination, but an employer cannot use disability or a protected accommodation request as an unlawful reason for adverse treatment.
For more information, see workplace human rights in Ontario.
What if you are fired after a sick-note dispute?
Don’t assume that being fired means your employer was entitled to deny you compensation.
A non-unionized employee who is terminated without cause is entitled to proper termination compensation. ESA minimums are not necessarily the employee’s full entitlement. Unless an enforceable employment contract validly limits your rights, common-law severance can be substantially greater.
Depending on factors such as age, position, length of service and the availability of similar employment, severance can reach 24 months’ pay in appropriate cases.
Read our guide to severance pay in Ontario.
What Should You Do If Your Employer Demands a Sick Note?
Ask what legal or workplace entitlement the requested note is supposed to support before deciding how to respond.
Use these steps:
- Identify the type of absence. Are you taking one of your three ESA sick days, a longer medical leave, paid sick leave or disability accommodation?
- Keep the request in writing. Save emails, text messages, attendance warnings and HR correspondence about the note.
- If it is an ESA sick day, point out the current rule. Your employer can request reasonable evidence but can’t require a certificate from a qualified health practitioner for the statutory sick leave.
- If accommodation is involved, participate in the process. Provide reasonable information about restrictions and needs while protecting unnecessary confidential medical details.
- Keep communicating during a longer absence. Don’t allow a medical-leave dispute to turn into an allegation that you abandoned your job or stopped responding.
- Document retaliation. Keep records if hours are cut, discipline begins or threats are made after you use sick leave or request accommodation.
- Get advice before resigning. If the employer’s treatment is making continued employment impossible, don’t quit before determining how leaving could affect your rights.
Can your employer require a sick note for one day off?
Not if that day is being taken as one of your three ESA sick days and the employer is demanding a certificate from a qualified health practitioner as proof of the leave. The employer can still request other evidence that is reasonable in the circumstances.
Can your employer require a sick note after three days?
Possibly, but there is no automatic Ontario rule that says a doctor’s note becomes mandatory on day four. Once you are outside the ESA’s three-day sick-leave entitlement, the answer depends on the type of leave, the employer’s benefit plan, whether disability accommodation is required and the reason medical information is being requested.
Do you need a sick note for stress leave?
Not for the ESA’s three statutory sick days, but a longer stress-related absence or disability accommodation can require medical documentation. Mental-health disabilities receive the same Human Rights Code protection as physical disabilities.
See our guide to stress leave in Ontario.
Ontario’s sick-note rules are straightforward for the ESA’s three sick days: your employer can’t require a certificate from a qualified health practitioner to prove your entitlement. The situation becomes different when a longer leave, paid sick plan, disability accommodation or return-to-work process is involved.
The employment lawyers at Samfiru Tumarkin LLP help non-unionized employees across Ontario address improper sick-note demands, disability accommodation problems, sick-leave discipline and termination after a medical absence. We can determine what information your employer is entitled to request and what rights you have if the situation has already affected your job.
If your employer is demanding medical information, threatening discipline or telling you that your job is at risk, don’t resign or stop attending work without understanding your rights. Contact Samfiru Tumarkin LLP and have the situation reviewed.