How Long Is a Sick Note Valid in Ontario? Expiry Rules Explained
Does your Ontario sick note expire? Here's everything you need to know about validity periods and when you need a new note.
## How Long Is a Sick Note Valid in Ontario?
A sick note in Ontario is valid for the specific dates stated on the document. There is no universal "expiry date" — the validity depends on what the physician wrote.
## Key Rules About Sick Note Duration
### The Note Covers Specific Dates
A sick note that says "unable to work from May 1-3" is valid only for those dates. If you need additional time off, you need a new note.
### No Maximum Duration
There is no legal maximum for how long a sick note can cover. A physician can write a note for:
- 1 day
- 1 week
- 1 month
- Longer (for serious conditions)
The duration should be clinically appropriate for the condition.
### Retroactive Notes
A physician can issue a note for dates that have already passed (retroactive). For example, if you were sick Monday-Wednesday but couldn't see a doctor until Thursday, the note can cover Monday-Wednesday.
MedLetter can issue retroactive notes for recent absences (typically within the past 7 days).
## When Do You Need a New Sick Note?
You need a new note when:
1. Your absence extends beyond the dates on the original note
2. Your employer's policy requires periodic updates (e.g., weekly for extended absences)
3. You have a new, separate illness
4. Your return-to-work date changes
## Can an Employer Require Ongoing Notes?
Yes, for extended absences, employers can reasonably request:
- Updated notes at regular intervals (weekly or bi-weekly)
- A return to work clearance note
- Functional abilities information for accommodation planning
However, these requests must be reasonable and not overly burdensome.
## MedLetter for Follow-Up Notes
If you need an extension or follow-up note, MedLetter can provide:
- Extension notes for ongoing conditions
- Return-to-work clearance letters
- Updated documentation for extended absences
**$49 per note | CPSO-registered physician | Within 6 hours**