The means of law harmonization is a very popular topic discussed by law scholars and business practitioners. The
means of law harmonization through the substantive rules of the law of international trading is regarded efficient
to prevent conflicts among systems of law which are subscribed by each country. The main goal of law
harmonization is to look for homogeneity from fundamental principles through all of systems of law available
(which will be harmonized). CISG in arranging the contract is viewed from the principle of consensus so that the
absence of the things will not affect the validity of the contract. CISG does not arrange the relationship of law
between the validity of a covenant and its implications. The contract of selling and buying in CISG, instead of
requiring an agreement between two sides, requires real actions. The things being sold and bought must be free
of rights and demand of the third side, expect the buyer who agrees to receive the things and complies with the
rights and demands.
Keywords: Harmonization, CISG, Contracts