The Australian Christian Lobby has distributed flyers attacking Cootamundra MP Steph Cooke for her vote to decriminalise abortion.
Ms Cooke was one of six NSW Nationals MPs targeted by a total of 94,200 flyers, according to the Australian Christian Lobby (ACL).
An ACL spokesman said 15,700 flyers were delivered in the electorate of Cootamundra, which urged constituents to "look at Steph Cooke's voting record on abortion".
ACL NSW director Kieren Jackson said the flyers were distributed due to the legislation to remove abortion from the criminal code was an "extreme piece of work"
"The fact that only two Nationals Party MPs out of thirteen voted against the bill shows just how out of touch the party is on this issue," Mr Jackson said.
"Nationals MPs in the upper house now have an opportunity to show they have woken up to the extreme nature of this bill.
"We have seen how this issue has damaged the Liberal Party, but it's also damaged the Nationals who have shown themselves to be out of touch with their voter base."
Ms Cooke declined to comment and pointed to her statement issued when the Reproductive Health Care Reform Bill passed Parliament's lower house last month by a 23-vote majority.
At the time, Ms Cooke said voting for the bill had been an "extremely difficult decision".
"I knew the bill had the overwhelming support of Parliament, and I wanted to ensure it was amended to ensure the highest possible safeguards for families and women facing this unimaginably difficult decision," she said.
"While I have strong personal views on this subject, I also believe in exercising compassion and humanity and not passing judgement on the personal decisions of others."
Reproductive Rights Rural NSW Riverina spokeswoman Caitlin Langley said the ACL was misrepresenting the terms of the bill in the flyers.
"I never cease to be amazed by the Australian Christian Lobby using false and misleading propaganda to slander politicians," she said.
Ms Langley said the flyer's claim that decriminalisation would come in the form of a "radical abortion-to-birth bill" was incorrect.
"Those procedures can only be done in the context that the woman's life is in jeopardy," she said.
"80 per cent of terminations occur before 16 weeks."
Ms Langley said she could accept people voicing their opposition to the bill, but wanted the debate to be based on facts.
"Steph Cooke is absolutely in touch with the people and there has been an overwhelming response from doctors living in rural NSW who have been consulting with MPs on this," Ms Langley said.
Independent Wagga MP Joe McGirr voting against the bill and said at the time that he was concerned about doctors who opposed abortion being required to make referrals, as well as a lack of community consultation.
Debate on the bill will resume in the upper house later this month and Wagga-based Nationals MLC Wes Fang has said he will support the bill.