Within Australia, the Department of Foreign Affairs and Trade Provides a small number of notarial services through the Australian Passport Office. These include: • Issuing of Certificate of no Impediment to Marriage (CNI). • Issuing Apostille and/or Authentication certificates. These certificates legalise the signatures and/or seals on Australian public documents. • We can certify copies of Australian Travel Documents • We can witness signature on the application form for certificate of no impediment to marriage (CNI). What we cannot do: • We cannot certify copies of documents or witness signatures. If you require these services then you should contact another provider. For example, a Justice of the Peace or an Australian notary public. • We cannot legalise foreign documents or documents issued by non-government organisations.