This report addresses the dilemma faced by the food and food packaging industries regarding the acceptability of packaging materials for Kosher foods. Religious authorities have raised concerns about potential migration of “animal-derived” substances to food from packaging, leading to uncertainty and customer assurance problems. The report highlights the importance of Kosher seals for observant consumers and the impact on marketing. It acknowledges the lack of clear guidelines and diverse interpretations of Kashrus laws, making case-by-case judgments necessary. The report aims to provide context, background information, points of difference among authorities, and customer assurance strategies for plastics packaging manufacturers.