As technology shifts the focus from retrospective justice to preemptive control, from deliberation to optimization, and from state power to private influence, trust becomes an ever more contested terrain—at once constructed, eroded and renegotiated across multiple domains of law. This year, the fourth edition of the IE Lawtomation Days seeks to explore the effectiveness and limits of regulation through the lens of trust. How can legal frameworks sustain trustworthiness in AI-driven decision-making and digital governance? How can law not only inform automation but also ensure faith in the institutions and mechanisms it establishes? Is law the most appropriate tool to build trust, or should other mechanisms, such as ethics, corporate responsibility and technical safeguards, play a greater role in fostering confidence in digital ecosystems?