Labor MP Leon Bignell denies he duped voters in his Adelaide electorate of Mawson by using how-to-vote cards that a rival party said were misleading.
Family First claimed Labor supporters also impersonated volunteers from its party in a ruse to win preference votes.
They wore T-shirts with the slogan Put Your Family First and gave out cards which urged a second preference vote for Labor if people were voting Family First in Mawson.
Mr Bignell argues a similar tactic was used by the Liberals in the previous election and that it is not against election rules, a point on which the Electoral Commissioner agreed in the wake of polling day.
Mr Bignell does not believe it affected the result in his marginal electorate, where he achieved a slight swing toward the ALP.
“I do apologise to anyone who feels in any way that they were duped, but I don’t think that could have been possible because there was so much argy-bargy going on at the polling booth with both Liberal people and Family First people pointing out to people who took the blue ‘Put Your Family First’ ticket that there could have been little doubt at all of what the ticket represented,” he said.
Former Liberal member for Mawson Robert Brokenshire is now a Family First Upper House member of parliament.
He says he was not involved with any similar effort in 2006 involving how-to-vote cards as Mr Bignell claimed.
“This situation now, just to get it into perspective, was blatant passing off of people purporting to be Family First volunteers,” he said.
“And that certainly did not happen in the previous election, and I think that’s the key difference in the debate that Leon Bignell’s trying to deflect.”
Mr Brokenshire filled a casual Upper House vacancy after he lost in Mawson in 2006.