What are the steps to register an Australian marriage in Thailand?

If you need a document translated let me know we used a great company in Bangkok.

Bangkok Translation and Interpretation Service absolutely brilliant

You need to get the certificate authenticated by the Department of Foreign Affairs in Australia then stamped by the Thai embassy in Australia. When you get to Thailand you need to get it translated and verified by the MFA

Marriage Australian man/Thai woman, in Bangkok, I was told (email from nsw.gov.au/family-and-relationships/marriages)

Recognition of overseas marriages

Overseas marriages cannot be registered in Australia and you cannot be issued an Australian marriage certificate if you have been married overseas. However, the marriage will usually be legally recognised in Australia, if:

it’s legally recognised in the country you were married

it would be considered legal if the marriage had taken place in Australia.

You’ll need to have:

registered your marriage in the country where it took place

have evidence of the marriage, such as a marriage certificate and any other supporting documents.