More than a quarter of young potential voters have not enrolled, and the printed rolls for next month's election close tomorrow.
The Electoral Enrolment Centre says only 73.4 per cent of people aged 18 to 24 and eligible to vote were enrolled by October 14, down from 76 per cent at the same stage before the last election in 2008.
Enrolment is still possible right up to the day before election day, which is November 26. But voters who do not enrol by tomorrow will not have their names on the printed rolls, will not get EasyVote cards and information packs in the mail before the election, and will have to cast votes by special declaration.
"That means filling in another form, which can take up to five times longer," said enrolment manager Murray Wicks.
"So get enrolled by Wednesday and make it easy for yourself."