Recriminations have begun for the loss of three Liberal Party seats in Tasmania, with a "dishonest" GetUp campaign in Bass blamed for helping unseat Andrew Nikolic.

Key points: Left-wing group GetUp campaigned hard to unseat Liberal Andrew Nikolic

Left-wing group GetUp campaigned hard to unseat Liberal Andrew Nikolic Tasmanian Liberal party accuses GetUp of pedalling lies and working for Labor

Tasmanian Liberal party accuses GetUp of pedalling lies and working for Labor GetUp website reveals $1.12m donation from CFMEU five years ago

Two of the other self-claimed Three Amigos, Eric Hutchinson and Brett Whiteley, also lost their electorates of Lyons and Braddon.

For the past two months the left-wing activist group GetUp has used television campaigns, billboards and volunteers, and paid staff to call, door-knock, man polling booths and exit polls in a push to unseat Mr Nikolic.

On election day GetUp had 10 paid staff members and 80 volunteers campaigning in Bass.

GetUp also targeted seats interstate including Liberal MP Jamie Briggs' seat of Mayo in South Australia, which was won by Rebekha Sharkie from the Nick Xenophon Team.

The national director of GetUp, Paul Oosting, said Bass, and to a lesser degree Braddon, were targeted in Tasmania.

"We've particularly focussed on the seat of Bass because Andrew Nikolic was one of the leaders in the hard right faction of the Coalition nationally, who have led the charge against the things like the proper funding of our schools and our hospitals, and that attack on renewable energy," Mr Oosting said.

Mr Oosting said the GetUp movement is proud of the outcome in Bass and it was a win for people power in the election campaign.

He confirmed GetUp spent between $100,000 and $500,000 campaigning in Bass, but the Tasmanian Liberal Party said it would have been no less than $300,000.

GetUp's campaign was 'disgraceful, intimidating'

Mr Nikolic reacted angrily to the GetUp campaign, posting this article on his official Facebook page.

In the post, Mr Nikolic wrote: "This is what dishonesty looks like — GetUp spent $500,000 and imported 90 activists into Bass."

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Liberal Party director in Tasmania Sam McQuestin criticised GetUp, saying they had pedalled lies, intimidated vulnerable people in the electorate and advertised on the behalf of Labor.

"GetUp ran a disgracefully dishonest and negative campaign against Andrew Nikolic in Bass based on the Medicare lie that the Labor Party had put out in the campaign," he said.

Mr McQuestin said GetUp used "robo-calls" and live calls to pensioners to frighten them about Medicare changes.

"Dishonest scare campaigns like the one that GetUp have run should be condemned and people like Ross Hart, who has won the seat of Bass, should understand they have won the seat on dishonest scare rather than anything else," he said.

Mr Oosting from GetUp said early exit poll results in Bass showed 11 per cent of people who took their how-to-vote cards were influenced by the guidance.

Mr Nikolic suffered a similar percentage swing towards Labor's Ross Hart of 10.6 per cent.

GetUp is funded by a combination of small private donations and other groups, including major unions.

On its website, it said the CFMEU donated $1,120,000 in 2010-11, and $10,000 from the Australian Education Union in 2011-12.

The site said all donations of over $10,000 were published online within 30 days of receipt.

Bill Shorten is a former board member, as is former federal Liberal leader John Hewson.

Unions, minor parties, marriage equality group claim roles in defeat

A GetUp how-to-vote card that was handed out in Tasmania. ( Supplied: GetUp )

But a range of interest groups are clamouring to claim influence over the dramatic Liberal Party wipe-out in Tasmania.

The Australian Recreational Fishers Party claimed its preferences were a significant factor in helping Labor get over the line in Bass, Braddon and Lyons.

The party put Labor second on its how-to-vote cards in the three Liberal seats because it said Labor's position on super trawlers was more in line with its own.

Former union movement leader Kevin Harkins said his party won between 5 and 6 per cent of the vote in the three seats and its preferences were a decisive factor.

"In all three seats that were held by the Liberals obviously Labor won, but there's not doubt in Braddon and Lyons, our preferences to Labor was the difference between them winning and losing those seats," Mr Harkins said.

Helen Richardson from the Australian Education Union's Tasmanian branch said their campaign on Gonski needs-based funding stepped-up over the past three weeks and helped Labor get over the line.

"Tasmanians have resoundingly rejected Turnbull's plan to cut funding to public schools and his policy to abandon needs-based school funding that would hit Tassie schools the hardest," she said.

Tasmanians United for Marriage Equality said three Liberal opponents to legalising same-sex marriage were ousted this election.

Spokesman Andrew Badcock claimed marriage equality was "on the back of people's minds of a lot of Tasmanians when they went and cast their ballots on the weekend".