Ontario Sick Note Laws 2026: What Employers Can and Cannot Require

Last reviewed and updated: August 2026 by a licensed Canadian physician

Ontario's sick note laws changed significantly in recent years. Here's what employers can and cannot legally require in 2026.


Updated August 2026, Current Ontario ESA and CPSO telemedicine standards.

Need a sick note in Ontario? MedLetter provides official physician-signed documentation for $49 with same-day delivery. No walk-in clinic visit needed — submit in 2 minutes, receive your note by email. Valid for employers, universities, and insurance across Ontario.


On Probation at a New Job?


If you're in your first 90 days at a new job, calling in sick without documentation can be career-ending. Probationary employees are often terminated for a single unexcused absence. Don't risk your new position — get official physician documentation from MedLetter for $49 same-day. Protect your job while you recover from your illness. New sick-note requests are temporarily paused while we review our service. We are not accepting new orders at this time..


Also known as: doctor's note, medical certificate, absence note, fitness-to-work letter, or medical documentation for employer. MedLetter provides all of these — same document, same $49 flat fee, same-day delivery.

Need a Sick Note After Hours?


It's 10 PM and you just realized you need a doctor's note for tomorrow morning. Walk-in clinics are closed. Your family doctor's office doesn't open until 9 AM — by then you're already late for work. MedLetter accepts requests 24/7, including evenings, weekends, and holidays. Submit at midnight, receive your note before your shift starts. New sick-note requests are temporarily paused while we review our service. We are not accepting new orders at this time..


Labour Day Weekend 2026


Getting sick over the Labour Day long weekend (August 30 - September 1, 2026) means every clinic is closed for 3 days. If you need a sick note for Tuesday September 2nd, MedLetter is your only option for same-day documentation. We're available all weekend — submit your request Saturday, Sunday, or Monday and receive your note before you're due back at work.


GTA Commuters


If you commute on the GO Train from Oshawa, Barrie, or Hamilton to Union Station, taking a sick day means losing a full day just to get a doctor's note. MedLetter eliminates that problem — submit from your couch, get your note by email, and forward it to HR before your shift would have started. Works for TTC, MiWay, YRT, and Durham Transit riders too.

Ontario Sick Note Laws: The 2026 Landscape

Ontario's Employment Standards Act (ESA) governs when employers can require medical documentation. Understanding these rules protects both employees and employers. This guide covers every scenario you might encounter.

The 3-Day Rule: What It Actually Means

Under the ESA, Ontario employees are entitled to:

  • 3 unpaid sick days per calendar year (January 1 - December 31)

  • These days are job-protected, you cannot be fired for using them

  • Employers cannot require a medical note for these 3 days (Working for Workers Act, 2022)

  • These apply from your first day of employment (no waiting period)


However, there's a critical nuance: many employers have company policies that go beyond the ESA minimum. If your employment contract or company handbook requires documentation for any absence, that policy may be enforceable, but only for absences beyond the ESA's 3 protected days.

The legal hierarchy:
1. ESA minimums (cannot be overridden by contract)
2. Collective agreement provisions (if unionized, often more generous)
3. Employment contract terms (cannot reduce ESA minimums)
4. Company policy (cannot override ESA or contract)

When Can an Ontario Employer Require a Sick Note?

An employer can legally require a sick note when:

| Situation | Can Require Note? | Legal Basis |
|-----------|------------------|-------------|
| First 3 ESA sick days | No | Working for Workers Act, 2022 |
| 4th+ sick day | Yes (if policy exists) | Employment contract/policy |
| 3+ consecutive days | Yes (common threshold) | Employer policy |
| Pattern of absence | Yes (with caution) | Attendance management |
| Return from extended leave | Yes | OHSA / duty of care |
| Safety-sensitive role | Yes | OHSA requirements |
| EI Sickness Benefits | Yes | Service Canada requirement |
| WSIB claim | Yes (Form 8) | WSIA requirement |

What Can a Sick Note Say in Ontario?

A valid Ontario sick note must include:

  • The physician's name and CPSO registration number

  • Date of assessment

  • Statement that the patient was assessed

  • Dates of recommended absence (start and end)

  • Any functional limitations (if applicable for accommodation)

  • Physician signature (handwritten or electronic)

  • Contact information for verification


A sick note cannot be required to include:
  • Your specific diagnosis (privacy-protected)

  • Details of your medical condition or symptoms

  • Treatment plans or medications

  • Prognosis or recovery timeline

  • Mental health specifics

  • Information about other medical conditions


Your Rights as an Ontario Employee

Under the Ontario Human Rights Code and ESA:

| Right | Details |
|-------|---------|
| Medical privacy | No diagnosis disclosure required |
| Choice of physician | Can obtain from any licensed physician (including virtual) |
| Doctor-patient confidentiality | Employer cannot contact your doctor without written consent |
| No retaliation | Cannot be penalized for using ESA sick days |
| Accommodation | Employer must accommodate disability to undue hardship |
| Equal treatment | Virtual notes = in-person notes |
| Cost protection | Employer should not impose unreasonable costs |

Virtual Sick Notes: Fully Legal in Ontario

The CPSO confirms that virtual care is a legitimate form of medical practice. This means:

  • A sick note from a virtual consultation is legally valid

  • Employers cannot reject a note because it was issued virtually

  • The Ontario Human Rights Tribunal has upheld virtual medical documentation

  • CPSO-registered physicians providing virtual care meet the same standards as in-person


Key CPSO principle: The standard of care is the same regardless of whether the encounter is virtual or in-person. A physician must still exercise clinical judgment.

What If My Employer Rejects My Sick Note?

If your employer rejects a valid sick note, follow these steps:

1. Ask for the rejection reason in writing, This creates a paper trail
2. Review your employment contract and company policy, Understand what they can actually require
3. Check if the note meets legal requirements, All elements listed above present?
4. Respond in writing, Explain that the note is from a CPSO-registered physician and meets all legal requirements
5. File a complaint with the Ontario Ministry of Labour, If the rejection violates the ESA
6. Contact the Ontario Human Rights Tribunal, If the rejection is discriminatory
7. Consult an employment lawyer, If termination is threatened (many offer free consultations)

Employer Obligations: What HR Needs to Know

Ontario employers (including Shopify, TD Bank, RBC, Amazon, Loblaws, and government agencies) must:

  • Accept notes from any CPSO-registered physician (including virtual)

  • Not require notes for the first 3 ESA sick days

  • Maintain confidentiality of all medical information received

  • Store medical documentation separately from personnel files

  • Not share medical information with other employees

  • Accommodate disabilities to the point of undue hardship

  • Not use sick days in performance evaluations (for ESA-protected days)


The Working for Workers Act: Key Changes

| Year | Change | Impact |
|------|--------|--------|
| 2022 | Bill 88 | Cannot require note for ESA sick days |
| 2023 | Bill 79 | Strengthened enforcement mechanisms |
| 2024 | Bill 190 | Additional worker protections |

Industry-Specific Considerations

Healthcare workers (ONA/CUPE):

  • Collective agreements typically allow 6-12 paid sick days

  • Documentation required after 3+ consecutive shifts

  • Occupational health may require fitness-for-duty assessment


Teachers (ETFO/OSSTF):
  • 11 paid sick days per year under collective agreement

  • Documentation typically required after 5+ consecutive days

  • Short-term disability plan kicks in after sick days exhausted


Federal employees in Ontario (PSAC/PIPSC):
  • 10 paid sick days under Canada Labour Code (federal jurisdiction)

  • Different rules than provincial ESA

  • Treasury Board policies apply


How MedLetter Helps

MedLetter provides sick notes that are:

  • Issued by CPSO-registered physicians

  • Compliant with all Ontario employment standards

  • Verifiable by employers at medletter.ca/verify

  • Delivered same day (typically 2-6 hours)

  • Accepted by all Ontario employers (including Shopify, TD Bank, RBC, Amazon, Loblaws, and government agencies)


New sick-note requests are temporarily paused while we review our service. We are not accepting new orders at this time.

$49 | No clinic visit required | Accepted by Ontario employers (including Shopify, TD Bank, RBC, Amazon, Loblaws, and government agencies)

Related: Sick Note Ontario, Complete City Guide | Ontario Sick Note Cost 2026 | Ontario ESA Sick Note Rules

Frequently Asked Questions

Can my employer require a sick note for one day in Ontario?
For ESA-protected sick days (the 3 days), no. For absences beyond ESA minimums, it depends on your employment contract and company policy. Many employers have a "3+ consecutive days" threshold.

What happens if I refuse to provide a sick note in Ontario?
For ESA-protected days, your employer cannot penalize you. For absences where documentation is legitimately required (beyond ESA minimums, under a valid policy), refusal may result in the absence being treated as unauthorized.

Can my employer call my doctor to verify my sick note?
No. Your employer cannot contact your physician without your written consent. They can verify the note's authenticity through the verification system (e.g., medletter.ca/verify) but cannot access your medical information.

Do I need a sick note for a mental health day in Ontario?
For your first 3 ESA sick days, no, regardless of whether the reason is physical or mental health. Beyond that, your employer's policy applies. Mental health is a protected ground under the Human Rights Code.

Can I be fired for calling in sick in Ontario?
Not for using your ESA-protected sick days. However, excessive absenteeism beyond protected leave, if properly documented by the employer and not related to a disability, may be grounds for progressive discipline.

How much can an employer charge me for a sick note in Ontario?
Your employer cannot charge you for a sick note. The cost of obtaining the note (from a clinic or online service) is your responsibility, though some employers reimburse this cost.

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Sources: Ontario Employment Standards Act, 2000 (ESA, s.50), Ontario Human Rights Code (s.17), Accessibility for Ontarians with Disabilities Act (AODA). Last verified: August 2026.

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