Are electronic signatures legally binding in Australia?

Short answer: yes. Electronic signatures are recognised throughout Australia. The wrinkle is that Australia has a federal Act plus separate state and territory Acts, so the precise position depends on which law governs your document.

Which laws apply in Australia

The Electronic Transactions Act 1999 (Cth) covers Commonwealth matters. Each state and territory has its own corresponding Electronic Transactions Act covering documents under its jurisdiction. The Acts are broadly consistent with each other, which is why most commercial documents are treated the same way nationally.

Separately, company execution of documents under the Corporations Act has been modernised to permit electronic execution, which removed a long-standing area of doubt for documents signed by company officers.

What makes an electronic signature valid

• A method is used to identify the person and indicate their intention regarding the information being signed.
• The method is as reliable as appropriate for the purpose, or is proven in fact to have identified the person and indicated their intention.
• The person receiving the document consents to the electronic method.

As in New Zealand, the reliability standard is proportionate. The question is whether the method suits the document, not whether it is the most sophisticated method available.

Where the exclusions sit

Each jurisdiction excludes certain document types, and the exclusions are not identical between states. Wills, powers of attorney and some statutory documents are the usual examples, and requirements for witnessing can differ. If your document falls into one of those categories, check the legislation for the relevant state or territory rather than assuming the general rule.

What this means for engagement letters and proposals

Ordinary commercial agreements, including engagement letters, proposals, service agreements and terms of business, are well within the accepted use of electronic signatures. The practical requirement is evidential: be able to show who signed, what they signed, and when.

1. 1Capture the signer name rather than an anonymous mark.
2. 2Record the time of signing.
3. 3Preserve the exact document version that was signed.
4. 4Send the signer their own copy of the signed document.

How Proffa handles this

Proffa captures the signature online against a named signer with a timestamp, issues the signed PDF to both parties, and keeps the engagement terms attached to the proposal so scope, price and terms are accepted together. Clients sign without creating an account.