This paper summarises the discussion that took place during a one day workshop organised by Climate Strategies and hosted by the South Centre in Geneva, September 10. Expert discussion revealed marked differences in the international perception of the objectives of border adjustments, their impact on future climate negotiations as well as preferred approaches to their implementation and legal justification. These differences became the basis for discussion about possible international cooperation on border adjustment that seeks to limit and possibly harmonise their use to a narrowly defined and therefore more widely acceptable scale and scope.