CLIVE Palmer has called for a full review of Australia's voting system after claiming he cannot win a lower house seat due to Australia's "corrupt system".

Mr Palmer said there were a number of irregularities with the voting system which have the potential to rob him of victory in the Sunshine Coast seat of Fairfax.

He said postal votes and pre-poll votes were favouring his LNP opponent Ted O'Brien by an implausibly large ratio and the integrity of the process had been marred by lax or non-existent security over precast ballots.

"The AEC has myself at 51% and Ted O'Brien at 48% but watch this space there will be changes and he will probably get up by a few hundred votes as a result of corrupt practices," Mr Palmer said.

"Politics is a ruthless game and this is what happens. That the counting is so long and so drawn out is a sign of a changing result and the complexity of the system."

Mr Palmer earlier today told AAP his Liberal National Party rival Ted O'Brien is likely to get over the line by a few hundred votes.

"I'd be highly surprised if I won," he told AAP today.

"But there's absolutely no way I will win based (on) voting irregularities and the security of the ballots."

He said if he fails to win Fairfax, two PUP candidates expected to be elected to the Senate will block Tony Abbott's policies unless electoral reform is promised.

"We think it's a corrupt system. Until that's sorted out Abbott won't be getting any legislation through the Senate with our support," Mr Palmer said.

Mr Palmer was on 53.93% and the LNP's Ted O'Brien had 47.07% after distribution of 56.37% of the total vote in Fairfax.

He said that at two booths in Coolum, 60 per cent of the vote went to the Palmer United Party yet the pre-polling vote only had the party at 37 per cent - a major irregularity.

"The AEC said in writing before the election that pre-polling would be counted before Saturday night but that never happened," Mr Palmer said.

"So you've got a whole lot of votes that were left unsecured and a lot have not got AEC signatures on them so who knows what's been added and taken out of that box. They should be informal.

"In at least one instance bags of unsecured ballots were left for up to two weeks at premises in Nambour owned by a prominent LNP member who had access to the building. Why weren't they secure?

"The AEC needs to publish who owns these buildings and there needs to be tighter security to prevent unattended votes being tampered with."