The Conservative and Green parties have each filed official letters of complaint to Elections Canada about a "Shun Lunn" campaign aimed at upending Conservative cabinet minister Gary Lunn in his B.C. riding.

Both parties allege Election Act violations against the Dogwood Initiative for its efforts to unify the left-of-centre vote behind the local Liberal candidate in Saanich-Gulf Islands.

A letter to Elections Canada from Lunn's office says the group may be producing and erecting lawn signs, calling voters and urging voters to support Liberal Briony Penn and not Lunn, all without registering as a third party in the federal election.

Elections Canada wouldn't comment, but both parties say the complaints have been dropped because the Dogwood Initiative was in the process of officially filing its status at the time the complaints were made.

Vote splitting has played a role in the Saanich-Gulf Islands riding in the past, where the Liberals, Greens and NDP combined have traditionally received more votes than Lunn.

This time around the New Democrat candidate withdrew early in the election after admitting to inappropriate actions during a skinny-dipping incident years ago, prompting calls to unite the left vote to oust Lunn.