What “properly executed” actually means

People tend to assume that a witnessed document is an ordinary document with an extra signature on it. It is not. Each of the Acts governing statutory declarations, affidavits and deeds prescribes a procedure, and it is the procedure that gives the document its effect. A declaration signed by the right person, in the right form, containing statements that are entirely true, can still be refused if the steps were taken in the wrong order.

That is worth understanding before you draft anything, because almost every document that comes back rejected fails on one of four elements rather than on its contents.

The four elements

The Acts differ in wording and in detail, but the same four requirements recur across jurisdictions and document types.

Element	What it requires	Who it falls on
Identity	The witness must be satisfied who the person in front of them is, by personal knowledge or by sighting identification	The witness
Presence	The declaration or oath must be made in the presence of the witness, physically or, where authorised, by audio-visual link	Both
The oral step	Something must usually be said, not merely signed	The person making the document
Attestation	The witness signs and records their name, their capacity and, for remote witnessing, the method used	The witness

Identity

Every jurisdiction requires the witness to know who they are dealing with, and several are prescriptive about how. Section 34 of the Oaths Act 1900 (NSW) requires a New South Wales witness to certify that they saw the person's face, and either that they have known the person for at least twelve months or that they confirmed the person's identity from a named identification document; the twelve-month period and the identification documents are prescribed by the Oaths Regulation 2024 (NSW). That certification is required whether the witnessing happens across a desk or over a video call.

This is the element people most often assume is a formality. It is not: it is the only part of the process that connects the signature on the page to a particular human being, and it is the reason a witness cannot simply accept an assurance that the person is who they say they are.

Presence

The person must make the declaration, or swear the affidavit, in the presence of the witness. Where witnessing by audio-visual link is authorised, the statute defines what counts as presence and what the witness must do to satisfy it. Where it is not authorised, presence means physical presence and nothing else will do.

Western Australia is the clearest illustration of the distinction. Section 12(3)(c) of the Oaths, Affidavits and Statutory Declarations Act 2005 (WA) requires the declarant to declare orally in the presence of an authorised witness, and Western Australia has not legislated to permit that to happen by video link. Section 12(4) separately provides that the signing of the declaration need not occur in the witness's presence. The Act therefore distinguishes deliberately between the steps that may be completed away from the witness and the step that may not.

The practical consequence is that presence is a question about the document, not about the people. It is decided by the law the document is made under, not by where anyone happens to be sitting.

The oral step

Most Acts require something to be said. For a statutory declaration this is typically a declaration that the person is the person named, that the contents are true, and that the signature is theirs. For an affidavit it is the oath or the affirmation, administered by the witness and answered by the deponent.

Silence is the most common defect in this category, and it is almost always inadvertent: the document is signed, the witness signs, and nobody says anything at all. Where the Act requires an oral declaration, a document executed in silence has not been made in the manner the Act prescribes.

Attestation

The witness signs, and in most cases must record more than a signature. Name and capacity are ordinarily required, so that a reader can tell whether the witness fell within the authorised class. Where the witnessing was remote, an endorsement identifying the method is also required.

Section 14G of the Electronic Transactions Act 2000 (NSW) is explicit about this. A witness who witnesses by audio-visual link must observe the signing in real time, be reasonably satisfied that the document they sign is the same document or a copy of it, sign the document or the copy, and endorse it with a statement specifying the method used to witness the signature and stating that it was witnessed in accordance with the section. No particular wording is prescribed for that endorsement, but its absence is a defect.

What the witness is not certifying

This is worth stating plainly, because it is misunderstood in both directions.

A witness certifies the process. They certify that the person in front of them was identified, that the declaration or oath was made in their presence, and that the document was signed. They do not certify that the contents are true, that the document is legally effective, that it is the right document for the purpose, or that the person was well advised to sign it.

Responsibility for the truth of the contents rests entirely with the person making the document. That is why the offence provisions in each jurisdiction attach to the person who makes a false declaration and not to the person who witnessed it.

It follows that a witness cannot cure a defect in the document by witnessing it carefully, and that a person cannot shift responsibility for a false statement onto the witness who watched them make it.

Order of operations

Because the witness attests to having observed the signing, the sequence matters:

1. The witness confirms identity.
2. The person makes the oral declaration or takes the oath.
3. The person signs.
4. The witness signs, records their capacity, and adds any required endorsement.

A witness signature already on the page before the declarant signs records nothing that happened. A document showing the witness signing on an earlier date than the declarant invites exactly that inference, and it is a common enough error that some receiving bodies check the dates for precisely this reason.

Alterations

An alteration made after execution is not covered by the attestation, because the witness did not see it. Where a correction is needed, the choices are to re-execute the document, or to have the alteration initialled by both the declarant and the witness at the time of witnessing.

Correcting a witnessed document after the event by crossing something out and writing over it produces a document whose attestation no longer matches its contents. That is not a technicality: the whole value of the attestation is that it records the state of the document at the moment it was executed.

Who cannot witness

Two separate questions arise, and they are often run together.

The first is whether the person falls within the authorised class. That is set by the Act the document is made under, and the classes are not uniform. A Queensland statutory declaration under the Oaths Act 1867 (Qld) must be witnessed by a justice of the peace, a commissioner for declarations, a notary public, a lawyer, or a conveyancer or other person authorised to administer an oath. The Commonwealth class is far broader. An Australian legal practitioner falls within the authorised class in every Australian jurisdiction, which removes the question entirely.

The second is independence. A witness who has an interest in the document, or in the transaction the document supports, is a poor choice even where they fall squarely within the authorised class. A colleague who holds a justice of the peace appointment but stands to be paid out of the claim your declaration supports is within the class and should still not be the witness.

When a step is missed

Several Acts contain substantial compliance provisions. Section 16(2) of the Western Australian Act, for example, provides that validity is not affected by a failure to follow the required procedure exactly, so long as the procedure actually followed substantially complies with it.

Those provisions are a remedy and not a plan. They operate after the fact, to preserve a document that has already been executed defectively, and whether they save a particular document is a question nobody wants to be arguing. In practice the far more common outcome is simply that the registry or the agency refuses the document and you do it again, which costs time you usually do not have.

The four elements are not onerous. They take about five minutes between them. Nearly everything that goes wrong goes wrong because one of them was treated as a formality rather than as a requirement.

This note is general information about how witnessed documents operate. It is not legal advice and is not a substitute for advice on your own circumstances or on the requirements of the body your document is going to.