Financial Guarantees are a financial deposit to be provided to the state by the mining operator to ensure that the closure cost are not transferred to the society. In the European Union the main regulatory framework are the Extractive Waste Directive 2006/21/EC and the Environmental Liability Directive 2004/35/EC. Are there available any reports, experiences or case studies on the determination and calculation approach of financial guarantees inside and outside of Europe ? Thank you in advance !