Katie Price said she was left "disgusted" when she discovered that fake TikTok accounts had been set up to target her 14-year-old daughter Princess.
The teenager warned her fans in an Instagram Story that fake accounts had been contacting people who followed her on social media.
She said: "Hey guys, this is a fake account and they are going around adding people from my TikTok followers and saying things about me to random people that aren't true."
Princess, whose father is Price's ex-husband Peter Andre, urged her fans to report the account and any others set up to target her.
Watch: Princess Andre terrified to go out alone amid kidnap threats
Price shared Princess's warning message to her own 2.6 million Instagram followers and added another condemnation to those targeting her daughter.
She said: "Disgusts me people even at [Princess's] age, 14, people doing this to her #trolls"
The 43-year-old star then shared an image of a news report about the fakery and declared that "hopefully it will stop now".
Price has campaigned extensively around the issue of social media trolling, with particular focus on those who target her 19-year-old son Harvey Price with ableist abuse.
She is an advocate for social media sites requiring a photo ID for each and every account.
In February, Price launched a petition calling for 'Harvey's Law', which would make online abuse a criminal offence in its own right and call for photo ID.
Cases involving social media abuse are currently prosecuted as "malicious communications" under the 2003 Communications Act.
Read more: Jake Quickenden calls for anti-troll law
Price spoke to a House of Commons committee in 2020 after a previous petition she launched garnered more than 220,000 signatures.
She said: "It's just getting worse. It's just on a wider spectrum of stuff. We all know [online abuse prevention] has got to become a law and if it doesn't, I will keep fighting so it does.”