Labour MPs Andrew Little and Trevor Mallard are maintaining that they have not defamed ACC Minister Judith Collins, and say they will make that clear in responses to letters from the minister's lawyer.
Ms Collins announced last month that she would take legal action against Mr Little and fellow Labour MP Trevor Mallard, as well as Radio New Zealand, for making allegedly defamatory comments about her over the case of a leaked email about an ACC client.
Mr Little and Mr Mallard last week received letters from Morrison Kent lawyer Philip Ahern requesting that they apologise for the comments, and threatening to proceed with defamation action if they did not. They were given until yesterday to respond.
In his response, Mr Little said he had nothing to apologise for and would "not be intimidated by the continuing threat of legal proceedings".
"As an Opposition MP, I am required to hold ministers to account for their conduct and decisions," he wrote.