A JP is not authorised to witness or certify documents which are for use in foreign countries.

A Notary Public has the ability to handle documents for international use.

If your document is for a matter in Australia, for example, a statutory declaration for an Australian VISA application then you should seek the services of a JP.

If your document is for an overseas matter or a foreign embassy then a Notary Public is the applicable person.

For JP services we suggest a google search in your state or area. If you are in NSW there is a link here that provides a register and other information when looking for a JP:

https://www.jp.nsw.gov.au/Pages/justices-of-the-peace/finding-a-jp.aspx#JPservicesbysuburbA%e2%80%93Z