The "Strengthening Transparency and Obligations to Protect Children Suffering from Abuse and Mistreatment Act of 2025," or the STOP CSAM Act of 2025, seeks to enhance protections for child victims and witnesses in federal court proceedings. It amends Title 18 of the U.S. Code to broaden definitions of exploitation , psychological abuse , and covered persons , including victims of kidnapping. The bill introduces the concept of "protected information" for child victims, establishing a presumption that public disclosure of such information is detrimental and requiring courts to deny disclosure requests unless a compelling public interest outweighs harm to the victim. Further court protections include updated provisions for recorded testimony, ensuring adult attendants are visible during a child's testimony, and authorizing appropriations for guardians ad litem. The legislation also facilitates restitution payments for victims of child sexual exploitation and abuse. It mandates restitution for offenses involving identifiable minors and allows for the appointment of a trustee or fiduciary to manage restitution funds for victims who are minors, incapacitated, or foreign citizens, with authorized appropriations for this purpose. A significant portion of the bill focuses on increasing accountability for the tech industry. It amends reporting requirements for online service providers to the CyberTipline, mandating the submission of specific information about apparent child pornography or planned exploitation within 60 days of obtaining actual knowledge. Providers must include details like user identification, terms of service, and whether the content was publicly available or AI-generated. The bill also requires large providers to submit annual reports to the Attorney General and FTC detailing their child safety measures, policies, and data on the prevalence of child sexual exploitation on their platforms. The Act establishes new criminal and civil penalties for providers who knowingly fail to report or preserve material, or who submit false information, with fines increasing if an individual is harmed. It also creates a new offense for interactive computer service providers that intentionally host or store child pornography, or knowingly promote or facilitate related violations, imposing substantial fines. While providing limited liability for good-faith reporting, it clarifies that this protection does not extend to knowing failures or misuse of preserved material. Finally, the bill expands civil remedies for victims of online child sexual exploitation. It broadens the private right of action under 18 U.S.C. 2255 for victims of various offenses, including those depicted in child pornography. A new civil remedy is introduced under 18 U.S.C. 2255A, allowing victims to sue interactive computer service providers and app stores for intentional, knowing, or reckless promotion, aiding, abetting, hosting, or making child pornography available. This new remedy offers actual or liquidated damages, attorney fees, and potential punitive damages, with no statute of limitations, and explicitly states that Section 230 of the Communications Act does not limit these claims. The bill includes defenses related to encryption and timely content removal, and allows for sanctions against parties engaging in repeated bad faith civil actions or defenses.