A Certificate of Analysis (COA) is an official laboratory report that summarizes the results of analytical testing performed on a cannabis or hemp sample, including potency levels, contaminant screening results, and pass/fail determinations for regulatory limits. COAs provide transparency for manufacturers, regulators, and consumers by documenting the safety, potency, and quality of a product. They serve as the primary compliance document for regulated cannabis markets and are often required to accompany products at the point of sale or during regulatory inspection.