gday, love the site - apologies if this has been discussed elsewhere, but how can i join executive club from australia, and be certain that transfers and points booking will hold up
British Airways Executive Club does not technically allow Australian residents to join.
This is a hangover from their joint venture with Qantas that was terminated by Qantas in 2013 to make way for their current venture with Emirates, and means you will need to use an overseas address to register.
I’d suggest just using the address of a friend or family member you trust to keep your loyalty card for you, which is the main item you’ll be sent in the mail.Source: http://www.pointhacks.com.au/guide-to-buying-avios-british-airways-iberia-plus/
As with all FF program, make sure your name matches that on your travel documents (e.g. passport).