If you need a signature witnessed or document certified for use in Australia, you probably do not need a notary. Declarations, affidavits and certified copies of documents for use in Australia can be attested or certified by a Justice of the Peace. Notaries are lawyers who charge for their services, whereas Justices of the Peace are volunteers and provide their services free of charge:
If you need a signature witnessed or document certified for use in a country other than Australia, you probably do need a notary. A notary is a legal official whose attestation or certification is recognised internationally.