A wide variety of measures are used to provide evidence of financial provision for environmental liabilities. These are the focus of this chapter. Most jurisdictions allow an operator to demonstrate financial provision by a combination of the financial provisions as well as individual financial provisions. This enables the potential downsides associated with certain measures to be counteracted by the upsides of another measure. Regulators usually retain the option to approve alternative financial provisions (i.e. measures other than those considered in this practical guide) if they are satisfied that they are secure, sufficient and available when required.