Lottery agents are waiting for a Western Sydney resident to come forward and claim their half of the $80 million first division Powerball jackpot drawn last night."The ball's in their court," NSW Lotteries spokesman John Vineburg said this morning."We have the address of the owner. It’s a registered player."But they didn’t include their phone number on the registration card, and they aren’t in the phone book so we have been unable to contact them by phone last night or this morning."I’m hoping that some time over the course of the day we’ll establish contact with them and be able to say: 'You’ve won $40m'."The $80m prize was the second largest in Australian lottery history, and will be shared by two winners.One winning ticket was bought from an agency in Sydney’s west, while the other was purchased online by a Melbourne resident.Lottery authorities were unwilling to knock on the Sydney winner’s door to tell them about their win, as this could compromise their privacy, Mr Vineburg said.They would most likely send them a letter by courier or an email, he said.NSW Lotteries would not reveal the exact suburb where the winning ticket was bought, "giving the winner a chance to wander into an outlet" today, Mr Vineburg said.Once the winner completed their claim form, they would receive the $40m cheque in about two weeks.Mr Vineburg urged disappointed Sydneysiders not from Western Sydney not to toss out their tickets without first checking, as prizes won in the lower divisions ranged from $12 to $70,000.Last-minute punters queued yesterday for lottery tickets in a bid to win the big prize.The $80m jackpot came just weeks after an Adelaide man and a Queensland couple shared a record $106 million prize from Oz Lotto.But interest in this week’s prize was "a bit muted’’ compared to the OzLotto haul, Mr Vineburg said.This week there were about six million entries across the country, compared with 10 million last month, he said."I think people need a bit of breathing space between big draws."The consecutive big jackpots in a matter of weeks was simply an "incredible coincidence", Mr Vineburg said.The previous Powerball jackpot record, $58.7 million, was shared by four workmates from Melbourne’s north last year.