Unclaimed property (UP), including dormant financial and tangible assets, remains an overlooked area in global financial systems due to weak enforcement, fragmented regulations, and low public awareness. However, its growing volume and economic implications have prompted many countries to reform legal frameworks to enhance transparency and recovery. This cross-country study investigates the administrative and legal structures governing UP across selected systemically important jurisdictions, including India, the US, Canada, the UK, Australia, and emerging economies. The research examines dormancy periods, statutory provisions, post-dormancy procedures, and claim settlement processes, revealing a stark contrast between centralised, digital frameworks in developed economies and fragmented, often manual systems in developing ones. Unclaimed assets represent significant idle capital, which if reintegrated, could boost economic productivity and individual financial well-being. The study highlights the urgent need for harmonised legal standards, proactive due diligence, digital claim infrastructure, and targeted awareness campaigns. These steps are essential not only for efficient asset recovery but also for reducing financial opacity, improving institutional accountability, and fostering inclusive economic growth.