Independent MP Andrew Wilkie is demanding parties stop doing "grubby" preference deals as they try to unseat him in Denison.
Mr Wilkie says Labor and the Greens are negotiating a preference swap in the marginal Hobart-based seat, and has accused the ALP of also attempting to secure Liberal preferences.
"Seems that everything the parties claim to stand for amounts to nothing when it comes to their political self-interest," he said in a statement.
"This betrays their members and all those who support and vote for them."
Mr Wilkie is being targeted after he slipped under the radar to grab Denison from third spot in 2010.
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The seat had been held by Labor for 23 years.
Mr Wilkie says he has written to the ALP, Liberals and Greens to tell them he will do no preference deals.
Instead, he will issue a how-to-vote card with an instruction to place the number one next to his name and a reminder to number other boxes as the voter wishes.
The Greens have accused Mr Wilkie of using independent South Australian senator Nick Xenophon to do his preference deals for him.
Senator Xenophon has reportedly offered to preference the Greens' Sarah Hanson-Young in return for the party preferencing Mr Wilkie in Denison.
Mr Wilkie says Senator Xenophon has acted independently to support a fellow anti-gambling candidate.
