The main objective of the Action is to improve the quality standards in the valuation of externalities produced by the different types of forest in Europe, agreeing in research protocols for investigators to follow. The main expected benefits are the achievement of an improved and consistent quality level in forest valuation exercises undertaken in Europe, the improvement and spreading of the practice of benefit transfer, and thereby increase the use of forest externality values as a tool for the valuation of forest nature as a European resource, to provide end-users with reliable monetary estimations of forest externalities and to provide the research environment with a future research agenda.