Missing supplier data is one of the fastest ways to fall out of step with the EU Packaging and Packaging Waste Regulation and national Extended Producer Responsibility schemes. When material composition, recyclability, and recycled-content figures cannot be traced back to source, reporting obligations quietly become regulatory exposure, and the gaps tend to surface at the worst moment: mid-audit. The operational cost compounds through stalled market access, penalty risk, and weeks lost chasing data across multiple supplier tiers. This breakdown lays out a practical path forward when the supplier data behind PPWR and EPR reporting is incomplete. It covers how to triage missing inputs, where automated supplier data collection cuts manual effort, and how continuous audit readiness replaces the annual scramble. It also shows how AI-driven compliance closes reporting gaps without adding headcount.