You can check your enrollment at check.aec.gov.au. The cut-off date for updating enrollment details and for new voters to be part of the plebiscite was August 24. If you check your enrollment and find your address isn’t right, you should call the ABS on 1800 572 113 between 8am and 8pm to put down an alternative address where they can send your ballot. The ABS will also advertise locations in every capital city, and some regional and remote locations, where people can pick up and return their plebiscite forms. Locations, dates and times for where forms can be picked up are advertised here: Pick-up locations.