后记：
俺之前说到差点出问题，就是在外事外贸局办理single status certificate公证的时候。
认证类型有很多种，主要分authentication 和 apostille。以下是我们的对话：
工作人员：Which stamp are you trying to apply？Authentication or apostille?
俺：What's the difference？
工作人员：There's no difference。Just different country has different requirement. You're going to China, right? Then you have to contact relevant Chinese institution to find out.
Which stamp do I need? An Authentication or an Apostille?
That depends on the country you are dealing with.
As a general rule, countries that are party to the Hague Convention Abolishing the Requirement of Legalisation for Foreign Public Documents require an Apostille on documents which qualify as Australian public documents. A full list of countries that are party to this convention can be found at the Hague Conference on Private International Law website.
Documents going to countries that are not party to the Hague Convention generally require an Authentication. These countries include China, Vietnam and most of the Middle East.
