Liberal National Party booth workers were forced to take off their green T-shirts and stop handing out a green flyer in a Brisbane seat, after a ruling by the Australian Electoral Commission.
Opposition Leader Tony Abbott meanwhile has taken a swipe at Labor for its campaign tactics after one its supporters was found handing out how-to-vote cards and wearing a T-shirt of similar colour to those of the Liberal camp. (Read more: Abbott slams dirty tactics).
With the Greens confident of winning their first Senate seat in Queensland, candidate Larissa Waters said fake how-to-vote cards were being distributed by LNP workers wearing green T-shirts at polling booths in the Brisbane seat of Ryan.
Ms Waters told reporters at Kelvin Grove State school, where she voted, that she was not surprised by the display of "gutter politics".
"It is exactly this sort of underhanded tactics that turns voters off the major parties and towards the Greens," she said.
A spokesman for LNP candidate Jane Prentice defended the actions."They're not fake Green how-to-vote cards; they're clearly Liberal National Party cards," he said.
But after a complaint from the ALP about the same matter, the commission found the material and the actions breached electoral laws.
Just before the commission was due to take the matter to the Federal Court in Brisbane on Saturday afternoon, it received written undertakings from the state director for the LNP, Michael O'Dwyer, to stop workers handing out the pamphlet and take off the T-shirts.
The commission then called off its legal action, its chief legal officer Paul Pirani said.
The sly tricks allegedly continued north of Brisbane where Treasurer Wayne Swan's wife and daughter accused LNP volunteers of removing his election banners at a primary school north. (Read more: Bunting row).