The United Nations Convention on Contracts for the International Sale of Goods (CISG/Convention des Nations Unies sur les contrats de vente internationale de marchandises, CVIM), also known as the Vienna Convention of 11 April 1980, has been ratified by 93 countries around the world as of 16 January 2020, including all EU member states with the exception of Portugal and Malta (as well as Great Britain). China, Russia and the United States, to name but a few, have also ratified the UN Sales Convention. The UN Sales Convention applies to cross-border contracts for the sale of movable goods for commercial purposes. It is one of the most important, if not the most important set of rules in the field of international law. Correctly applied, the UN Sales Convention is a very effective instrument in international trade. Based on our experience in the enforcement of commercial claims abroad, we recommend that sales contracts be concluded in accordance with this law. Disadvantages in comparison to the German law of the BGB and HGB can be compensated by intelligent contract design, especially general terms and conditions for cross-border trade.