The United Nations Convention on Contracts for the International Sale of Goods (CISG; the Vienna Convention) is a treaty that is a uniform international sales law. As of the end of 2015, it has been ratified by 84 states that account for a significant proportion of world trade, making it one of the most successful international uniform laws. Vietnam was the most recent state to ratify the Convention, having acceded to it on 18 December 2015.

The United Nations Convention on Contracts for the International Sale of Goods (CISG; the Vienna Convention) is a treaty that is a uniform international sales law. As of the end of 2015, it has been ratified by 84 states that account for a significant proportion of world trade, making it one of the most successful international uniform laws. Vietnam was the most recent state to ratify the Convention, having acceded to it on 18 December 2015.