The value chains for critical raw materials (CRM) used in electric vehicle (EV) batteries often involve mining in the Global South, Australia and Canada, production in Asia, and consumption in the Global North. Starting in 2027, EU law will require a ‘digital product passport’ (DPP) for market entry. These passports will provide EU consumers, investors, regulators and others with products and sustainability data throughout the entire value chains. Professor Luke Nottage will explore how such a system could function, with varying degrees of decentralization, inspired partly from private international law mechanisms that have evolved to handle cross-border traceability of documents. Examples include systems for recognizing marriage and other personal or commercial certificates, arbitral awards and foreign judgments.