Electronic Signatures can be used to sign a variety of documents in NSW Australia for documents such as Contracts & Lease Agreements.

However there are various documents that are exempt and cannot be signed electronically, such as: Power of Attorneys, Wills, Notarized documents etc.

Consult with your lawyer whether a document can be signed electronically to ensure your documents are valid and legally binding.

Attorney General’s Department – Electronic Signatures
https://www.ag.gov.au/legal-system/electronic-signatures-documents-and-transactions/electronic-signatures

ELECTRONIC TRANSACTIONS ACT 1999
https://classic.austlii.edu.au/au/legis/cth/consol_act/eta1999256/