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Witnessing Documents

In Western Australia the Oaths, Affidavits and Statutory Declarations Act 2005 (the OASD Act) provides for the manner in which oaths, affidavits and statutory declarations are administered and witnessed.

There are 44 occupational groups who are able to witness statutory declarations, including State & Commonwealth public servants, police officers, nurses and teachers.  In addition, the OASD Act also authorises any person before whom, under the Statutory Declarations Act 1959 of the Commonwealth, a statutory declaration may be made.

Affidavits (including Family Court documents) can only be witnessed by a Justice of the Peace, legal practitioner, public notary, registrar, clerk of a court or any mining registrar appointed under the Mining Act 1978.

A list of persons authorised to witness statutory declarations can be viewed below.

For further information on witnessing documents please contact (08) 9425 2525.

Information for Authorised Witnesses on how to certify documents and witness a statutory declaration can be downloaded below.

For a copy of the Oaths, Affidavits and Statutory Declarations Act 2005 go to

Last updated: 21-Jul-2020

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