Do You Need a Sick Note for 1 Day Off Work in Ontario?

No. Ontario's Employment Standards Act (ESA) explicitly prohibits employers from requiring a medical certificate for any of your 3 annual sick days. This means your employer legally cannot demand a sick note for a single day off, it's the law, not just a guideline.

Ontario Law is Crystal Clear

Unlike many provinces, Ontario has explicitly legislated this issue. The ESA states that employers cannot require a 'certificate from a qualified health practitioner' as evidence of entitlement to sick leave for the 3 unpaid sick days provided under the Act. This is not a suggestion, it's a legal prohibition.

What This Means in Practice

For your first 3 sick days per calendar year:

• Your employer CANNOT require a doctor's note
• Your employer CANNOT require any medical certificate
• Your employer CAN ask you to confirm you were ill (verbal or written)
• Your employer CANNOT penalize you for not providing a note
• If your employer insists on a note, they may be violating the ESA

When You Might Still Want a Note

Even though Ontario law protects you, some situations make a note worthwhile: if you've already used your 3 ESA days, if you're in a probationary period, if you have a pattern of Monday/Friday absences, or if you want documentation for a potential accommodation request.

If Your Employer Violates the ESA

If your Ontario employer requires a sick note for one of your 3 ESA-protected days, you can file a complaint with the Ontario Ministry of Labour. However, many employees prefer to simply provide a note rather than create workplace conflict, which is where MedLetter comes in.

MedLetter: Quick Protection

If you want a note for peace of mind (or your employer is pushing boundaries), MedLetter provides one from a CPSO-registered physician same day. $49, no clinic visit, accepted everywhere in Ontario.