Witnessing Signatures: When a Notary Is Needed

A signature may need an ordinary witness, an authorised witness or a notary. The correct choice depends on the document, the law governing it and the receiving authority's instructions—not simply whether it will be used in Australia or overseas. Confirm the required act before signing or booking an appointment.

Key takeaways

• An ordinary witness watches a person sign; the document and governing law determine who is eligible.
• An authorised witness must belong to a prescribed class for a particular declaration, affidavit or form.
• A notary public can perform and certify notarial acts for documents intended for overseas use.
• Overseas use does not automatically mean notarisation, an apostille or authentication is required. Obtain written instructions from the receiving authority.
• If signature witnessing is required, leave the document unsigned until the witness or notary tells you to sign.

What are the three kinds of signature witnessing?

An ordinary witness observes the signature and signs the document. Depending on the document, the witness may need to be an adult, independent, not a party or otherwise qualified. Do not assume the same rules apply to every contract, consent, deed or will.

An authorised witness is someone permitted under the relevant scheme. A Justice of the Peace, lawyer or another authorised person may be eligible, but the list is not universal. Commonwealth statutory declarations, state declarations, affidavits and government forms can have different procedures across states and territories. The Australian Government publishes the approved witnesses for a Commonwealth statutory declaration; for other documents, check the applicable legislation named on the form.

A notary may verify identity, witness or take an acknowledgment, administer an oath or affirmation, and issue a notarial certificate under signature and seal. The exact checks and certificate depend on the requested act. This is different from a notary merely filling an ordinary witness box.

How do the practical differences compare?

Point	Ordinary witness	Authorised witness	Notary
Main function	Observes a signature	Performs the witnessing required by a scheme	Performs and certifies a notarial act
Who may act	As the document and law allow	A person on the applicable list	An appointed notary public
Identity and records	As required	As the form or law requires	Depends on the act; photo ID and a record are commonly required
Overseas acceptance	Recipient decides	Recipient decides	Recipient decides whether the result is sufficient
Legalisation	Not a DFAT-verifiable notarial act	Not automatically eligible	A notarial certificate may be eligible
Cost	May be free	May be free or charged	Professional notarial fee

When is an ordinary or authorised witness enough?

Use the witness specified by the form, governing legislation, court rules or receiving organisation. Examples may include an Australian contract or consent form with an ordinary witness line, a statutory declaration requiring an authorised witness, or an affidavit governed by a court's rules. Our guides explain who can witness a statutory declaration and the difference between a statutory declaration and an affidavit.

Do not add a notary merely because the document feels important. An unnecessary certificate can add time and cost without satisfying the actual rule. Conversely, using an ordinary witness where the form requires an authorised witness or notary can cause rejection.

Pause for wills, deeds and property documents. Their execution rules vary by jurisdiction and document type. Notarial involvement does not repair an otherwise invalid execution. Ask a solicitor to confirm the requirements; our state guides include witnessing documents in Victoria and witnessing documents in South Australia.

When might an overseas document need a notary?

A foreign authority, court, registry, bank, university or consulate may expressly require execution before a notary, an acknowledgment, a jurat or a separate notarial certificate. Powers of attorney are a common example, but the requirement is document-specific. See our guide to notarising a power of attorney.

Before booking, ask the receiving authority what act it requires and whether it has prescribed wording. Australian Government guidance says to confirm whether legalisation is needed because not all documents require it. If it is required, the recipient should identify whether it needs an apostille or authentication. Review the DFAT legalisation guidance.

An eligible original Australian public document may be capable of going directly to DFAT. Other documents may first need notarisation. DFAT verifies an eligible signature, stamp or seal; it does not certify the truth of the contents. A Hague Convention destination may use an apostille, while another route may require authentication and further consular steps. The destination and recipient decide the route.

Do you have to sign in front of the notary?

If the requested act is witnessing a signature or administering an oath for a jurat, expect to sign in the notary's presence after identification. Do not sign in advance. An acknowledgment can be a different act: the signer may acknowledge an existing signature if the notary can perform that act and the recipient accepts it.

1. Send the complete document and recipient instructions before the appointment.
2. Ask whether it must remain unsigned and whether witnesses must attend.
3. Bring current photo identification and supporting originals requested.
4. Sign only when instructed.
5. Check that the completed certificate matches the requested act.

Can signatures be witnessed by video?

Remote witnessing rules depend on the document, jurisdiction and witness role. A Commonwealth statutory declaration may be witnessed remotely if the statutory procedure is followed. The Attorney-General's Department explains how to make a Commonwealth statutory declaration with a witness.

That permission does not automatically authorise every notarial act by video. The notary must confirm that the particular act is legally and professionally available, and the receiving authority must accept it. The Society of Notaries of New South Wales currently says its notaries cannot witness document signing by Zoom; check current guidance when using its find a notary service.

What if a foreign form needs witnesses and a notary?

Some foreign documents, especially powers of attorney, include both witness lines and a notarial block. Ask the recipient how many witnesses are required, who may act and whether the notary may count as one. Confirm whether the notary can arrange another independent witness or whether you must bring one.

United States documents may request an acknowledgment or jurat. Their wording can refer to a US state, county or commission that does not describe an Australian notary. An Australian notary may decide to adapt the block or attach a separate certificate. Acceptance remains the recipient's decision. A US “notary signing agent” and a medallion signature guarantee are different services.

How can you avoid a bare witness signature?

If a notary signs only an ordinary witness box, the result may be a witness signature by a person who is a notary rather than the notarial act requested. Where notarisation is required, confirm whether the completed document needs a notarial certificate, signature and seal. If DFAT legalisation is also required, the act must be presented in a form DFAT can verify.

What changes when signing for a company?

A notary may need evidence that the company exists and that the signer has authority for the requested act. Depending on the recipient, this could include a current company extract, board resolution, power of attorney or constitutional provision. Ask what evidence is needed before ordering documents. Our legal declarations service covers company powers of attorney and resolutions.

The certificate may need to identify the signer's office, the company details and the evidence relied on. Requirements vary, so do not assume an ASIC extract or a board resolution will always be enough. Send the proposed certificate wording and company evidence in advance. If several directors must sign, confirm whether they can attend separately and whether each signature needs its own notarial act.

How much does signature witnessing cost?

Costs depend on the witness role and work required. An ordinary or authorised witness may provide the service free, although this is not guaranteed. A notary generally charges a professional fee based on the act, complexity, number of signers, certificates, copies and appointments. Travel, urgent work and waiting time can add cost.

DFAT legalisation, consular processing, translation and courier charges are separate. Ask for a written quote listing each expected stage. Do not pay for an apostille, authentication or embassy step until the recipient confirms it is required. See our notary fees guide and apostille and authentication service.

What should you send before booking?

• The complete document, including instructions and notarial wording.
• The destination country and receiving authority's name.
• Written requirements for witnesses, notarisation and legalisation.
• The number and location of signers, witnesses, originals and copies.
• Your deadline and any translation, DFAT, consular or courier needs.

Also say whether anyone has already signed and whether the recipient supplied a specimen certificate. If instructions are unclear, ask the recipient to confirm them in writing rather than asking the notary to guess what a foreign authority will accept. The notary can then identify conflicts or missing information before the appointment.

For further preparation, see documents to bring to a notary appointment, notary identification requirements and how long notarisation takes.

What is the practical conclusion?

Choose the witness by reading the document, governing rules and recipient instructions together. Overseas use can suggest that a notary may be required, but it does not prove that notarisation or DFAT legalisation is necessary. Confirm the exact act, sign only when instructed and check the completed certificate before leaving.

Related questions

• Who can witness documents in Western Australia?
• Who can witness documents in the ACT?
• When does a statutory declaration need a notary?
• How can someone verify a notarised document?
• Does a notary need the original document?

Send us your document requirements, including the document type, destination country and authority, signer location, number of witnesses and copies, and deadline.