IU Files US Lawsuit Against Meta to Unmask Online Defamers on Threads.

The Threads account behind the defamation campaign is identified as Person A, with a masked handle @7h***, and IU’s filing notes 52 posts between March and October 2025 as the basis for identifying the author.
The filing categorizes the 52 defamatory posts into six areas of alleged falsehoods, including plagiarism accusations, claims of Chinese ties, undermining IU’s overseas popularity, alleged exploitation of late-celebrity deaths, and assertions of media control and public opinion manipulation, as well as linking song lyrics to national tragedies.
A 2024 South Korean court ruling upheld plagiarism-related defamation claims and awarded the defendant 30 million won in damages, a precedent cited in IU’s case.
The broader cross-border strategy includes filing under 28 U.S.C. 1782 to obtain Meta-disclosed data for use in the South Korean civil suit, with EDAM Entertainment previously pursuing 96 individuals in 2023 and securing fines and damages; the effort extends to seeking information from overseas platforms.
K-pop star IU has filed a legal petition in a US federal court to unmask an anonymous Threads user accused of running a months-long defamation campaign against her, according to Korea JoongAng Daily. The petition, lodged in the Northern District of California, asks Meta to hand over account details that IU's team plans to use in a civil defamation lawsuit in South Korea.
The targeted account, identified only as Person A with the masked handle @7h***, allegedly published 52 false posts about IU between March and October 2025, KBIZoom reported. The move signals a sharp escalation in IU's cross-border legal push to hold online defamers accountable.
IU's legal team sorted the 52 posts into six categories of alleged falsehoods, according to Korea JoongAng Daily. These include plagiarism accusations, claims of Chinese ties, and efforts to undermine her overseas popularity. Other posts allegedly insinuated that IU exploited the deaths of late celebrities and linked her song lyrics to national tragedies.
The filing also accuses Person A of spreading claims that IU controls the media and manipulates public opinion, KBIZoom reported. IU's side argues the posts were not opinion but deliberate disinformation designed to damage her reputation over a sustained seven-month period.
IU's team filed under 28 U.S.C. 1782, a US law that lets foreign litigants get evidence from American companies for use in overseas courts. The petition asks Meta for the account holder's name, address, email, phone number, and IP address logs, according to Korea JoongAng Daily.
Because Threads is owned by Meta, which is based in the US, the Northern District of California is the right venue to make that demand. Once IU's team gets the data, they plan to name the person in the South Korean civil suit, KBIZoom reported.
A 2024 South Korean court ruling backs IU's position on at least one key allegation. That court upheld defamation claims tied to plagiarism accusations and ordered the defendant to pay 30 million won in damages, according to Korea JoongAng Daily. IU's current filing cites that ruling as a legal precedent.
The win shows IU's legal strategy has already produced results in Korean courts. Her agency, EDAM Entertainment, has used those rulings to build pressure on anonymous posters who assume overseas platforms shield them from accountability, KBIZoom reported.
This is not IU's first legal offensive. In 2023, EDAM Entertainment pursued 96 individuals for online harassment and secured fines and damages against multiple posters, according to KBIZoom. The agency has consistently pressed overseas platforms to cooperate with Korean legal proceedings.
The California petition is the latest step in a wider campaign to close the gap between anonymous online speech and real-world consequences. IU's team has made clear they will seek user data from foreign platforms whenever Korean courts cannot compel disclosure on their own, Korea JoongAng Daily reported.
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