Adoption of Indonesian children by foreigner is a form of intercountry adoption. In Indonesia such adoption is not prohibited but conditions are more difficult because it is a last effort or ultimum remedium for the best interests of the child. Therefore petition for intercountry adoption throught the court, its decision in the form of a court decision, because the proof as the same as the evidence in civil suit.This is defferent from the petition of national adoption.This paper discusses the implementation of the best interest of child’s principle in Indonesia and how to conduct intercountry adoption in Indonesia in order to avoid any attempts of illegal adoption. This paper concludes that the Indonesian Government has issued a number of l...