She penned a letter to DA member Henk Hugo, DA KwaZulu-Natal deputy provincial chairperson Shehana Kajee, DA deputy chief whip Mike Waters and National Council of Provinces MP Bronwynn Engelbrecht.
She said she wrote to them because the four reposted or otherwise distributed an image on social media which made claims about various “findings” against her by the auditor-general.
“In May this year, the auditor-general dismissed the contents as fake. Not only was the AG’s signature forged, but his office denied knowing anything about the origins of the document.
"By reposting or otherwise distributing the document, you published defamatory material regarding me, which is aggravated by the fact that this was done as part of a concerted effort to discredit me for political reasons.”
De Lille said she had instructed her attorneys to commence legal action against them in respect of these “defamatory allegations”.
While Walters, Hugo and Kajee could not be reached for comment, Engelbrecht said she could not comment as she had not seen the letter.