The Strengthening Transparency and Obligations to Protect Children Suffering from Abuse and Mistreatment Act of 2025, or STOP CSAM Act of 2025, significantly amends federal law to enhance protections for child victims and witnesses of sexual exploitation. It broadens the definitions of "exploitation" and "psychological abuse" and introduces the concept of "protected information" for child victims, which includes personally identifiable, medical, and educational records. The bill establishes a presumption that public disclosure of such protected information would be detrimental to the child, making it harder to release this sensitive data in court proceedings. The Act also strengthens court procedures by clarifying rules for video-recorded testimony and the role of adult attendants for child witnesses. It mandates that probation officers and guardians ad litem provide comprehensive victim impact statements, reflecting the child's views and the overall impact of the offense. Furthermore, it authorizes significant appropriations for guardian ad litem programs to ensure child victims receive adequate legal representation and support. Regarding restitution, the bill makes it mandatory for courts to order restitution for a wider range of child exploitation offenses, including those involving identifiable minors in visual depictions. It also introduces provisions for courts to appoint a trustee or other fiduciary to manage restitution payments for child victims, incapacitated victims, or foreign victims, ensuring funds are handled in their best interest. This includes authorizing appropriations to support the administration of these fiduciary roles. A key focus of the legislation is increasing accountability and transparency within the tech industry. It revises the duty of online service providers to report child sexual exploitation material to the CyberTipline, specifying detailed information that must be included in these reports and setting clear deadlines. Providers face substantial criminal and civil penalties for knowingly failing to report or preserve such material, with fines doubling or tripling if an individual is harmed as a direct result of the violation. Large online service providers are now required to submit annual reports to the Attorney General and the Federal Trade Commission, detailing their measures, policies, and technologies used to combat child sexual exploitation. These reports must cover CyberTipline data, internal reporting mechanisms, safety policies, and efforts to prevent abuse, with provisions for redaction of sensitive information before public release. The bill also introduces direct liability for interactive computer services that intentionally host or store child pornography or knowingly promote related offenses, carrying significant fines. Finally, the Act expands civil remedies for victims of online child sexual exploitation. It creates a new private right of action against interactive computer service providers and app stores that intentionally, knowingly, or recklessly promote or aid certain child exploitation violations, or host/store child pornography. Victims can seek actual or liquidated damages of $300,000, punitive damages, and injunctive relief, with no statute of limitations for these claims. The bill explicitly states that Section 230 of the Communications Act does not limit these new civil actions, while also providing defenses for providers who promptly remove content or are technologically unable to do so without compromising encryption, and addressing bad faith litigation practices.