Statutory Declaration or Affidavit: Which Form Do You Need?

Two pieces of paper arrive at a notary desk looking identical: a page of numbered statements, a signature line, and a block underneath for someone else to sign, date and stamp. One of them is an affidavit. The other is a statutory declaration. They are taken by the same officers, they carry the same consequence for lying, and they are still not interchangeable — because the body asking for the document almost always asks for one of them by name.

The wording above the signature is the whole difference

The distinction is not in the subject matter, not in the length, and not in who prepared it. It sits in the closing sentence and in the block the officer completes underneath.

An affidavit is sworn or affirmed. The officer administers an oath or a solemn affirmation, the deponent answers out loud, and the block below — the jurat — records that the document was "sworn (or affirmed) before me" at a named place on a named date.

A statutory declaration is solemnly declared. No oath is administered. The declarant adopts a fixed sentence that comes straight out of a statute, and the block below records that the document was "declared before me".

A form that says "declared before me" is a statutory declaration whatever it is called on the cover page, and a form that says "sworn before me" is an affidavit. That is the test, and it takes about four seconds.

What a statutory declaration is

Section 41 of Ontario's Evidence Act authorises a judge, notary public, commissioner for taking affidavits, justice of the peace and certain other officers to receive the solemn declaration of a person voluntarily making it, and sets out the form of words. The declaration ends with the declarant stating that they make it "conscientiously believing it to be true, and knowing that it is of the same force and effect as if made under oath". Section 41 of the federal Canada Evidence Act does the same for matters within federal authority.

That closing sentence is not decoration and not a flourish added by whoever drafted the page. It is the operative part of the instrument. A declaration that omits it is a signed statement with a stamp on it, which is a different and much weaker object, and it is one of the reasons a document comes back from an institution that reads its own requirements closely.

Declarations are the ordinary instrument wherever a statement of fact is needed outside a court proceeding: confirming an identity or a name used in two spellings, declaring that a document has been lost, declaring marital status for a marriage abroad, supporting an immigration or pension file, or answering an institution that wants something firmer than a letter. The statutory declarations page sets out the kinds that come through this office most often.

What an affidavit is

An affidavit is a statement of evidence sworn or affirmed for use in a proceeding. Where the proceeding is a civil action in Ontario, its shape is prescribed rather than optional. Rule 4.06 of the Rules of Civil Procedure requires an affidavit used in a proceeding to be in Form 4D, expressed in the first person, stating the deponent's full name and, where the deponent is a party or a lawyer, officer, director, member or employee of a party, saying so. It must be divided into paragraphs numbered consecutively, each confined as far as reasonably possible to a particular statement of fact. An exhibit referred to in an affidavit is marked as an exhibit by the person taking the affidavit.

The same rule draws a line that surprises people: an affidavit is generally confined to facts within the deponent's personal knowledge, with statements of information and belief permitted in defined circumstances and only where the source is identified. A declaration carries no such structural rules, which is exactly why a tribunal or court asks for the affidavit rather than the declaration.

Tribunals and the Small Claims Court set their own forms and their own filing requirements on top of this. What the receiving body publishes is what governs, and their instruction sheet settles far more questions than any general description can. Where a sworn statement is prepared for use in a proceeding, the affidavits page describes the document side of that work.

Which one a given situation calls for

Where the document is going	Usual instrument
A civil proceeding in the Ontario courts	Affidavit, in the form the Rules prescribe
A tribunal such as the Landlord and Tenant Board	Whatever the tribunal's own form specifies, commonly an affidavit
A bank, insurer, school board or employer asking for a statement of fact	Statutory declaration
A student-aid or government programme form	Whichever the printed form names — the form decides
A consulate or foreign authority	Usually a statutory declaration, frequently followed by authentication
A lost passport, licence or certificate	Statutory declaration, unless the issuing body publishes its own form

The right-hand column describes what is ordinarily used, not what any particular institution requires. Where the requesting body has published a form, that form has already answered the question and the answer is printed on it.

What is identical in both, and why it matters

Everything that goes wrong at an appointment goes wrong in the parts the two documents share.

• The person appears and is identified. Current government-issued photo identification in the name on the document, for each person who signs.
• The signature happens in front of the officer. A page signed the night before has to be signed again. Nothing is gained by filling the line in early.
• The document has to be complete. An unfilled date, an empty amount, a reference to an exhibit that is not attached — none of these can be sworn or declared, because what is sworn or declared is the document as it stands at that moment.
• Exhibits are marked. Each attachment referred to in the body is identified and endorsed by the officer, which is why a short affidavit with twelve pages behind it takes longer than the affidavit alone.
• A false statement is an offence either way. Perjury under section 131 of the Criminal Code reaches a false statement made with intent to mislead under oath or solemn affirmation, and it names affidavits and solemn declarations in the same breath. That is the practical content of "the same force and effect as if made under oath".

What to bring to a notary appointment covers the identification and document side in more detail; it applies without change to both instruments.

Oath, affirmation and declaration are three wordings, not three weights

People sometimes read a solemn affirmation or a declaration as the weaker option, on the theory that an oath is the serious one. Ontario's Evidence Act takes the opposite position. A person who objects to being sworn may make an affirmation instead, and that affirmation is of the same force and effect as an oath. An affirmation is offered as a matter of course, and no explanation of the preference is asked for or wanted.

The declaration then reaches the same place by a third route, and its own statutory wording says so on the page. What differs between the three is the ceremony at the desk, which lasts under a minute, and the block the officer completes afterwards.

Ontario also permits an oath or declaration to be administered by video conference, under a regulation made in 2020 under the Commissioners for Taking Affidavits Act, subject to the conditions that regulation sets out. Whether a particular institution wants a remotely commissioned document is a separate question, decided by that institution rather than by the officer.

The four ways the wrong instrument gets produced

1. A form is filled in without reading its own jurat. Many published forms already name their instrument, and sometimes a narrower list of officers than "a commissioner". The line is usually above the signature block, in small type.
2. A declaration is drafted without the statutory sentence. A page of facts and a stamp is not a statutory declaration if the words that make it one are missing.
3. An affidavit is prepared for a proceeding without the prescribed structure. Unnumbered paragraphs, no statement of the deponent's role, information and belief with no source identified — each is a rejection waiting at the counter.
4. The document was signed before the appointment. This one costs a trip more often than all the rest combined, and it is free to avoid.

Either instrument is administered by a notary public or a commissioner for taking affidavits, and the difference between those two roles is a separate question from the difference between the two documents — one is about who signs the block, the other about what the block says.

What neither one settles

Neither instrument makes its contents true, and neither makes the wording achieve what the writer had in mind. The officer confirms that a named person was identified, that the oath, affirmation or declaration was taken, and that the signature was made in their presence. What the receiving institution does with the result is decided by that institution against its own rules. Drafting a document and administering the oath on it are two different jobs, and an article describing the general shape of these instruments is not a reading of anyone's particular paperwork.

Where the instrument has already been chosen by whoever asked for the document, the remaining part is short: the form, unsigned and complete, photo identification, and everyone who signs. Commissioning and booking a time are the straightforward end of this.