Guide
What Counts as a Signature in Australia?
Electronic execution, section 127, deeds and the accidental signature nobody plans for.
In short
In Australia a signature is any mark or process that identifies the signer and shows they intended to be bound. Wet ink, a DocuSign mark, a stylus scrawl, a click-to-accept and even a typed name in an email can all qualify. A short list of documents — affidavits, statutory declarations, some land and migration paperwork — still has extra formalities.
Clients ask this question in two very different moods. The first is hopeful: can we just sign this electronically and get the deal done today? The second is anxious: we never signed anything, so we are not bound — are we? The law disappoints one of them almost every time.
The Legal Test
Australian law has never required a particular form of autograph. What it requires is that the signature performs two functions:
- Identification — it must identify the person signing.
- Intention — it must indicate that person's approval of, and intention to be bound by, the contents of the document.
Where legislation requires a signature, the Electronic Transactions Act 1999 (Cth) and its state and territory equivalents add a third limb: the method must be as reliable as is appropriate for the purpose, or the recipient must consent to it. That is a commercial standard, not a technical one. There is no requirement in general commercial dealing to use a particular signing platform, certificate or cryptographic standard.
What Has Been Held to Be a Signature
| Method | Usually valid? | Practical note |
|---|---|---|
| Wet ink | Yes | Still the safest for deeds and anything unusual |
| DocuSign / Adobe Sign | Yes | Audit trail is the real benefit — keep the completion certificate |
| Pasted image of a signature | Yes | Valid but weak on proof if authenticity is disputed |
| Typed name at the end of an email | Often | The most common accidental binding we see |
| Click-to-accept / tick box | Yes | Log the version of terms accepted, the time and the IP |
| Stylus or finger on a tablet | Yes | Common for field services and trades dockets |
Company Execution Under Section 127
For companies, the relevant machinery is s127 of the Corporations Act 2001 (Cth). Since the Corporations Amendment (Meetings and Documents) Act 2022, electronic execution is a permanent feature: directors and company secretaries can sign electronically, signatories no longer need to sign the same physical document, and split execution across counterparts is expressly contemplated.
The commercial benefit of executing in accordance with s127 is the statutory assumption in ss128 and 129 — the counterparty can assume the document was duly executed. That assumption is why we still care which two people sign, and in what capacity. See our note on who must sign for a company.
Deeds
Deeds used to be the hard case: paper, sealed, signed in the physical presence of a witness. That has changed, but unevenly. NSW, Victoria and Queensland now permit electronic signing and, in defined circumstances, remote witnessing by audio-visual link. The formalities differ by state — the witnessing statement wording, the requirement to observe the signature in real time, and the retention obligations are not uniform.
Our rule of thumb: if the document must be a deed (a guarantee with no consideration, a deed of release, a restraint given for nominal consideration), confirm the governing jurisdiction's formalities before you circulate it, rather than after.
Where Extra Formalities Still Apply
- Affidavits and statutory declarations — jurisdiction-specific witnessing rules
- Wills, enduring powers of attorney and appointments of guardian
- Some land dealings and any document lodged with a land titles office in paper form
- Migration and certain court filings
- Documents where a contract, constitution or funder's requirements impose their own signing rules — private drafting can be stricter than the law
The Risk Nobody Plans For: Accidental Signature
The frequent dispute is not "our electronic signature was invalid". It is "we did not realise we had signed at all". A negotiation conducted by email, closed with "agreed, let's proceed" above a signature block, has been enough for courts to find a binding contract. If your team negotiates by email, two habits matter:
- Mark pre-contractual correspondence subject to contract and mean it.
- Reserve one named person as the only authorised signatory, and say so in your terms.
A Practical Signing Protocol
- Decide whether the document must be a deed. If yes, check the state formalities first.
- For companies, execute under s127 with two officers, or one for a sole director company.
- Use a platform that produces an audit trail, and archive the completion certificate with the executed PDF.
- Do not accept a returned signature page alone — take the whole executed document.
- Record the date of execution and the date of effect. They are not always the same.
Related Reading
See section 127 and company signing, how to amend a signed contract and our contract drafting service.
Frequently Asked Questions
What counts as a signature in Australia?
Anything that identifies the signer and shows they intended to be bound by the document. A wet-ink autograph, a typed name at the foot of an email, a stylus mark on a tablet, a click-to-accept in a contracting platform and a DocuSign or Adobe Sign mark can all be valid signatures.
Are electronic signatures legally binding?
Yes, for the vast majority of commercial documents. The Electronic Transactions Act 1999 (Cth) and its state and territory equivalents give an electronic signature the same effect as a handwritten one where the method identifies the signer, indicates their intention, and is reliable enough for the purpose — or is simply accepted by the other side.
Can a company sign electronically under section 127?
Yes. Since the Corporations Amendment (Meetings and Documents) Act 2022, directors and secretaries can execute documents electronically under s127 of the Corporations Act 2001 (Cth) permanently, and signatories no longer need to sign the same physical copy.
Which documents still need wet ink?
Statutory declarations and affidavits in some jurisdictions, certain wills and powers of attorney, migration and some court documents, and a shrinking list of land dealings. Deeds can now be signed and witnessed electronically in NSW, Victoria and Queensland, but the formalities differ by state, so check before you send.
Is a typed name in an email a binding signature?
It can be. Australian courts have repeatedly held that a name typed at the end of an email, and sometimes even an automatic signature block, is enough where the surrounding conduct shows the sender intended to be bound. That is a risk if your team negotiates loosely by email.
Do both parties have to sign the same way?
No. One party can sign in wet ink and the other electronically, and counterparts are fine. What matters is that each signature is authentic and that you hold a complete, unaltered executed version.
Next Step
If your signing process was designed before 2022 — or was never designed at all — it is worth twenty minutes. Book a 15-minute call and we will tell you where the exposure sits, on a fixed fee if any work follows.
Talk to us
Ready to talk it through?
Send us a note about what you're working on. We'll respond within one business day and, if we're a fit, book a free 15-minute consultation with a senior lawyer.