ICSID - International Centre for Settlement of Investment Disputes ICSID is an autonomous international institution established under the Convention on the Settlement of Investment Disputes between States and Nationals of Other States with over one hundred and forty member States. The Convention sets forth ICSID's mandate, organization and core functions. The primary purpose of ICSID is to provide facilities for conciliation and arbitration of international investment disputes. with arbitrationicsidinstitutionsinternationalinvestment-disputesorganizations