Deepfakes in Law: Defamation, Evidence, and Emerging Regulation

AI-generated synthetic media — commonly called deepfakes — have moved from technical curiosity to a genuine legal problem in courts, legislative chambers, and regulatory agencies around the world. The legal system is scrambling to adapt existing doctrines and craft new ones to address the harms these technologies enable.

Defamation and Right of Publicity

Deepfakes depicting real people in false situations raise immediate defamation questions. Traditional defamation law requires proving a false statement of fact that damages reputation — AI-generated video of a public figure saying something they never said fits squarely within this framework. The challenge is often identification and service of process: deepfake creators frequently operate anonymously or from jurisdictions that don't cooperate with civil discovery.

Non-Consensual Intimate Images

AI-generated intimate images of real people have prompted the most rapid legislative response. As of mid-2024, over 40 U.S. states have enacted laws specifically criminalizing non-consensual deepfake intimate images, and the federal DEFIANCE Act created a private right of action in federal court. The UK's Online Safety Act similarly addresses the issue.

Deepfakes as Evidence

Courts are grappling with how to authenticate digital evidence in a world where any video can potentially be fabricated. Federal and state rules of evidence already require authentication as a foundation for admission, but current standards were not designed with AI-generated media in mind. Courts and evidentiary scholars are considering whether specific deepfake authentication standards — including requirements for forensic analysis — are needed.