Meta filed lawsuits against multiple advertisers and operators accused of using AI‑generated celebrity deepfakes to promote fraudulent health products, fake courses and investment scams. Filings and regional reporting say the targets include operators in Brazil, China and Vietnam and highlight misuse of a Brazilian physician’s likeness.

In late February 2026 Meta announced legal action against several advertisers and intermediaries it says used AI‑generated videos and synthetic voices to impersonate celebrities and public figures in ad campaigns across its platforms. Company court filings and local reporting identify orchestrated networks deploying deepfake videos and audio to market bogus health remedies, sham educational programs and investment schemes, with operations traced to Brazil, China and Vietnam. In Brazil, filings and press accounts allege misuse of a prominent physician’s likeness to lend false credibility to fraudulent treatments; in Asia the suits name firms and individuals believed to have facilitated ad placement and targeting. Meta framed the litigation as an effort to disrupt a transnational ad‑fraud ecosystem that weaponizes generative AI to bypass platform safeguards and defraud consumers at scale. The company is seeking injunctions, damages and disclosure of ad‑buying records to identify operators and financial flows, while urging tighter industry and regulatory responses to deepfake advertising and cross‑border fraud.