A NSW Liberal Party candidate has had her personal Facebook account suspended, after it was linked to fake accounts that trolled her opponent.

Sitting Labor MP for Port Stephens, Kate Washington, last week claimed that for the past six months fake Facebook accounts had been deriding her, but praising her Liberal rival Jaimie Abbott.

The Liberal Party last week denied any involvement, but yesterday conceded Facebook suspended Ms Abbott's account as well as the account of parliamentary staffer Tasman Brown.

Mr Brown works for Liberal MLC Catherine Cusack.

Ms Washington said Ms Abbott should be disendorsed for what she said were dirty tactics.

"They thought they could get away with it," she told the ABC.

"Jaimie Abbott needs to come clean on her role in the coordinated campaign to smear me and my credibility on Facebook.

"She's proven herself unsuited to sit in Parliament, and I think the appropriate thing for her to do at this point is to stand aside. Failing that, the Premier should have her disendorsed."

An account under the name of 'Ben Daniels' was used to discredit Kate Washington.

The Liberal Party has denied Ms Abbott had any knowledge of the fake Facebook accounts, and it is blaming Mr Brown.

Ms Abbott told the ABC she was deeply saddened about the incident and felt many were misled.

"Elections should be a contest of ideas rather than a race for likes on social media, and I think that Tasman [Brown] forgot about this," she said.

"Tasman has admitted to me that as a volunteer on my campaign he was responsible for making multiple Facebook posts about the campaign under a number of names."

Kate Washington said she was the target of a smear campaign on Facebook. ( ABC News: Rob Virtue )

The Liberal candidate said she had called Ms Washington to apologise on behalf of her campaign and assured her that Mr Brown would have no further involvement in it.

"I intend to focus on continuing to campaign on issues that are important to this community," she said.

Opposition Leader Michael Daley said the trolling was a "new low" in Australian politics.

"This is Putin-style politics in Australia, it's not acceptable and I think that the position of the Premier's candidate in Port Stephens is untenable," he said.

Premier Gladys Berejiklian said she wanted respect on the campaign trail and reminded the media that Labor's deputy premier Penny Sharpe had to issue an apology weeks ago for a tweet.

"We don't want anyone to suffer unnecessarily because of the election campaign," she said.

"Everybody needs to work hard and be respectful to one another, that's what I call everyone to do for the next two weeks."

Staffer responsible for Facebook posts 'full of remorse'

Mr Brown is employed under Liberal MLC Ms Cusack, who said she was incredibly disappointed.

"He [Mr Brown] realises that it's been a huge mistake, it's an embarrassment and all I can say is he's very full of remorse and he's stepped completely aside from anything to do with the Port Stephens campaign," she said.

Ms Cusack said Ms Abbott's personal Facebook account was suspended only because it was linked to Mr Brown.

She said Mr Brown had administration rights to Ms Abbott's personal account to help with her social media campaign ahead of this month's state election.

Ms Washington has asked the clerk of the NSW Parliament to investigate whether Mr Brown's online activities violated any breach of parliamentary resources.

The marginal seat of Port Stephens is considered a crucial battleground in the NSW election, having attracted at least four visits from the Premier to endorse Ms Abbott.