Many people use the word “notarize” for almost any document that needs an official signature, stamp or seal. A bank asks for a certified copy. A school asks for a sworn statement. Immigration instructions mention an affidavit. A foreign authority asks for a notarized document. A form says that it must be signed before a commissioner for taking affidavits.
These requests sound similar, but they do not always mean the same thing.
In Ontario, a notary public and a commissioner for taking affidavits can both help with official document signing, but their roles are not identical. Choosing the wrong service may delay your application, create extra cost or leave you with a document that the receiving organization does not accept.
This article opens a series on notary and commissioner services in Ontario. The goal is to help you understand the basic terms before you book an appointment, sign a document or send paperwork to a government office, school, bank, employer, consulate or immigration authority.
Why the Difference Matters
A document may need official confirmation for different reasons. Sometimes the organization wants to know that you signed a statement under oath. Sometimes it wants a copy of your original document certified as a true copy. Sometimes it wants a signature witnessed. Sometimes it wants a document prepared for use outside Canada.
These are different tasks.
The first question should not be “Can you notarize this?” The better question is: “What exactly does the receiving organization require?”
A short instruction on a form can change the answer. For example, “sworn before a commissioner” usually points to a commissioner for taking affidavits or a notary public acting in that capacity. “Certified true copy” usually points to a notary public. “Notarized for use outside Canada” may involve notary services, but it may also require authentication, apostille or consular steps depending on the country and document.
If you are not sure what the instruction means, it is better to check before the appointment. A notary or commissioner can help with the act of signing, swearing, affirming, declaring or certifying, but they cannot rewrite the requirements of the organization that will receive the document.
What Is a Commissioner for Taking Affidavits?
A commissioner for taking affidavits is a person authorized in Ontario to take affidavits and administer oaths, affirmations and declarations.
The role is focused on sworn or declared statements. In simple terms, the commissioner confirms that the person signing the document has appeared before them, has identified themselves, and has sworn, affirmed or declared that the contents of the document are true.
Common Documents Signed Before a Commissioner
A commissioner may be needed for documents such as:
- affidavits
- statutory declarations
- sworn statements
- declarations required by forms
- certain government, immigration, business, court or administrative documents
The exact document depends on the purpose. A statutory declaration for an immigration application is not the same as an affidavit for a court matter. A declaration for a government form is not the same as a certified copy of a passport. The commissioner’s role is connected to the sworn or declared statement, not to every possible legal issue behind the document.
What the Commissioner Does Not Do
A commissioner does not automatically confirm that every statement in the document is factually correct. The person signing remains responsible for the truth of what they swear, affirm or declare.
A commissioner also does not necessarily give legal advice about whether the document protects your interests, creates legal risk or should be signed at all. If the document has legal consequences, especially in real estate, family, immigration, business or financial matters, legal advice may be needed before signing.
What Is a Notary Public in Ontario?
A notary public in Ontario has the powers of a commissioner for taking affidavits. In addition, a notary public can verify that signatures, marks and copies of documents are true or genuine.
This is why a notary public can often handle a wider range of document services than a commissioner. A notary may commission an affidavit, but may also certify a copy of an original document or witness certain signatures where notarization is required.
Common Situations Involving a Notary Public
You may need a notary public when the request involves:
- a certified true copy of an original document
- a notarized signature
- a notarized document for use outside Canada
- a document that specifically says it must be signed before a notary public
- an affidavit or declaration where a notary public is acceptable
- a document that must include a notarial seal or notarial certificate
The wording matters. If a form says “notary public,” using only a commissioner may not be enough. If a form says “commissioner for taking affidavits,” a notary public may usually be able to perform that function, but the document still needs to be completed correctly.
Notary Public vs Commissioner: Simple Comparison
The easiest way to separate the two roles is to look at what the document needs.
If the Document Is a Sworn or Declared Statement
You may need a commissioner for taking affidavits or a notary public. This applies when you are signing an affidavit, statutory declaration or similar document and confirming that the contents are true.
The key action is not the stamp by itself. The key action is the oath, affirmation or declaration.
If the Document Is a Copy of an Original
You usually need a notary public if the receiving organization asks for a certified true copy.
A certified true copy means that the copy is compared with the original document presented to the notary. It does not mean that the notary has confirmed that the original document is valid for every purpose, current, accepted by a foreign authority or sufficient for an application.
Certified copies will be discussed in detail in a separate article in this series because this topic often causes confusion.
If the Document Is for Use Outside Canada
You may need a notary public, but notarization may only be one step. Some foreign documents may also require apostille, authentication or legalization. The rules depend on the country, the type of document and the authority receiving it.
This topic deserves its own article because Canada’s apostille system changed the process for many documents used abroad. For now, the practical point is simple: before booking a notary appointment, check the destination country’s requirements and the receiving authority’s instructions.
Affidavit, Statutory Declaration and Certified True Copy
These three terms appear often, and they are easy to confuse.
Affidavit
An affidavit is a written statement that a person swears or affirms to be true. It may be used in legal, administrative, immigration or other formal processes. The person signing is responsible for the content.
Statutory Declaration
A statutory declaration is a formal declaration that something is true. It is often used when a sworn affidavit is not required, but an official declaration is still needed.
Certified True Copy
A certified true copy is a copy of an original document that a notary public has compared with the original. The notary confirms that the copy matches the original shown to them.
These are different services. An affidavit or statutory declaration is about the truth of a statement made by the person signing. A certified true copy is about whether a copy matches the original document presented.
What Notarization Does Not Prove
One of the biggest misunderstandings is the belief that a notarized document becomes “approved” or “accepted” because it has a notary stamp. That is not how it works.
Notarization or commissioning does not automatically prove that:
- the receiving organization will accept the document
- the document is legally suitable for your situation
- every statement inside the document is true
- the original document is valid for all purposes
- the document meets foreign country requirements
- the document is enough for an immigration, real estate, court or business matter
A notary public or commissioner performs a specific function. They may verify identity, witness a signature, administer an oath or declaration, or certify a copy. The receiving authority still decides whether the document meets its requirements.
This distinction is important for immigration applications, real estate transactions, documents for foreign countries and any situation where a mistake can create delay or legal consequences.
Online Commissioning and Remote Appointments
Ontario allows certain oaths and declarations to be administered remotely if legal requirements are met. Remote commissioning can be useful when a person cannot attend an office in person, but it is not automatically suitable for every document.
The process generally requires real-time electronic communication where the commissioner and the person signing can see, hear and communicate with each other throughout the transaction. Identification and document handling must also be managed properly.
Before choosing an online appointment, check whether the receiving organization accepts remotely commissioned documents. Some organizations may still require original ink signatures, in-person signing or specific wording.
Not every notary service can be completed remotely in the same way. For example, if you need a certified true copy, the notary may need to review the original document. The correct process depends on the document and the purpose.
How to Prepare Before Your Appointment
Good preparation saves time and helps avoid rejected documents. Before meeting a notary public or commissioner, review the instructions from the organization requesting the document.
Bring valid government-issued identification. If your document must be signed before the notary or commissioner, do not sign it in advance unless you have been told that it is acceptable. If you need a certified true copy, bring the original document, not only a scan or photo.
If the document has multiple pages, bring the complete document. Missing pages can create problems because the notary or commissioner may need to see the full context of what is being signed or certified.
If the document is for immigration, a foreign country, a school, a bank, a court or a business transaction, bring the instruction letter or website requirement from the receiving organization. The wording in the instruction often determines whether you need commissioning, notarization, a certified copy, apostille or another step.
When You Should Speak With a Lawyer First
Some documents should not be treated as routine signing tasks. If the document affects your legal rights, property, immigration status, business obligations, financial responsibility or family situation, you may need legal advice before signing.
A notary or commissioner can help complete a formal signing step, but legal advice is different. Legal advice considers whether the document is appropriate, what it means, what risks it creates and whether changes are needed before you sign.
You should consider speaking with a lawyer first if the document was prepared by another party, if you do not understand the legal consequences, if the document involves a dispute, if it affects ownership or money, or if it will be submitted in an immigration or legal process where the wording matters.
How This Series Will Help
This article is the starting point. The next articles in the series will look more closely at specific document needs: affidavits and statutory declarations, certified true copies, notarized documents for immigration applications, and apostille or legalization for documents used outside Canada.
Each of these topics has its own rules and common mistakes. Keeping them separate helps avoid confusion and gives you a better chance of preparing the right document the first time.
If you need help understanding whether your document requires a notary public, a commissioner for taking affidavits, a certified true copy or legal review before signing, MBLAW Professional Corporation can review your situation and help you determine the appropriate next step.
