Notary BasicsDecember 5, 2025

Notary Public vs. Commissioner for Oaths: Which One Do You Need?

Notary Public vs. Commissioner for Oaths: Which One Do You Need?
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Notary Public Serve

Professional Notary Public

In Ontario, you'll often hear the terms Notary Public and Commissioner for Oaths used interchangeably. However, they have very different legal powers. Choosing the wrong one can lead to your documents being rejected.

What is a Notary Public in Ontario?

A Notary has the highest level of authority. They can verify signatures, certify true copies, and handle documents for use outside of Canada. Their seal is recognized globally.

What is a Commissioner for Oaths?

A Commissioner is primarily authorized to administer oaths and affirmations for documents used within Ontario. They cannot certify true copies of documents like passports or degrees.

Which One Should You Choose?

  • Choose a Notary if: Your document is going abroad, you need a certified copy, or you are unsure of the requirements.
  • Choose a Commissioner if: You are swearing an affidavit for an Ontario court or a local government form.

At Notary Public Serve, we provide both services, ensuring your documents are legally compliant. When in doubt, a Notary Public is always the safer choice.

Disclaimer: This guide is for informational purposes and does not constitute legal advice.

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