This status report was prepared on behalf of the WPDD by its Task Group on the Decommissioning Safety Case. It reflects the viewpoints and materials of a topical session held in December 2001 plus the sharing of experience within the WPDD, which represents operators, regulators, R&D and policy specialists from countries with advanced nuclear infrastructure that have considerable experience in the field of decommissioning. These materials contribute to the content and substance of a safety case for decommissioning and will be helpful to individuals and organisations involved in the preparation of such a safety case.