Yes, e-signatures are legally binding for retail tenancy agreements in Australia under the Electronic Transactions Act 1999 (Cth) and equivalent state legislation, provided they reliably identify the signer and indicate their intention to sign. For retail leases, ensure compliance with state-specific retail tenancy laws, such as the Retail Leases Act 1994 (NSW), which do not prohibit electronic execution but may require additional formalities like witnessing for certain documents.