Same-sex marriage: All survey forms have been posted - so what happens now?

The Australian Bureau of Statistics says it has finished its initial mail-out of more than 16 million survey forms, and is now urging anyone who didn't receive one to contact the bureau for a replacement.

SSM postal vote has reached the halfway point. Source: AAP

Enrolled Australians have until October 20 to request a replacement form on the ABS website.

You can also go to a number of pick-up locations in capital cities and regional areas, or phone the ABS's info line.

Ordering a new form will render your original form invalid.

How long will this campaign last?

The ABS wants everyone to post their forms back by October 27, with a hard deadline of November 7.

Both the 'Yes' and 'No' campaigns are expected to run advertising right through to the end of the survey.

For more details, click the above podcast button in which Korean Program intensively analyse the implications of the current ad blitz from the both sides.