The "Artificial Intelligence Synthetic Content Accountability Act" establishes civil and criminal enforcement mechanisms to address the improper use of synthetic content generated by artificial intelligence. The bill defines key terms, including "covered synthetic content," and outlines the responsibilities of content providers to label and watermark such content. It introduces civil liability for the nonconsensual dissemination of covered synthetic content, allowing individuals to sue for damages if their likeness is used without consent in a harmful manner. The act also specifies defenses against liability and ensures the protection of plaintiffs' privacy during legal proceedings. Additionally, it imposes criminal penalties for knowingly disseminating harmful synthetic content, classifying such actions as a fourth-degree felony, and grants the attorney general and district attorneys concurrent jurisdiction for enforcement.

New provisions require large online platforms to implement reasonable identity verification methods for users posting synthetic content, ensuring that verification occurs each time content is posted or after a specified time interval. The bill mandates the protection of users' sensitive information and restricts the use of identification data solely for compliance with verification requirements. It also outlines conditions for disclosing user information obtained during the verification process, necessitating a court order in both civil and criminal cases. The act includes a severability clause to maintain the validity of remaining provisions if any part is found invalid.