docsmith

Check out this link.  https://www.border.gov.au/Trav/Citi/pathways-processes/application-options/adoption

Thailand is a signatory to the Hague Convention on intercountry adoption 

It reads to me that an adult can apply for citizenship if the were adopted outside Australia.

This is the form to use Form 1272 – Application for Australian Citizenship for children adopted under full Hague Convention or bilateral agreements (386KB PDF). 

This paragraph in the form says you can check with the local embassy if your adoption paper are acceptable.  

 An Adoption Compliance Certificate must comply with Article 23 of the Hague Convention. We recommend that before submitting an application using form 1272, you check with your nearest office of the Department or Australian mission overseas whether the documentation provided is a valid Adoption Compliance Certificate for the purposes of an application for Australian citizenship. If the incorrect form is used, the application will be refused and the application fee will not be refunded. 

I might be wrong but it is worth a phone call to the embassy.

14 hours ago, Kinnock said:

This was Arrivals last week - queue for immigration was back out of the Immigration Hall and into the main walkway.

 

And for Departures, the new whole body scanners cause unnecessary delays.  In the US they've been removing those scanners as they were found to be a waste of time. 

 

 

 

 

I was there that day and walked down to the other immigration point and was through in 10 minutes.  That quite often occurs and if one point is busy the other is  not.  For first time travellers that knowledge is not there.  The airport staff should have been directing travellers to the second arrival point