The UN Convention on Contracts for the International Sale of Goods (CISG)

The United Nations Convention on Contracts for the International Sale of Goods (CISG) is a multilateral treaty that establishes a uniform legal regime for contracts for the cross-border sale of goods. Such sales contracts operate as the backbone of international trade, and uniform rules for sales contracts provide traders with an efficient, modern and comprehensive legal framework to support their commercial activities. Its uniform rules, specifically designed to meet the needs of cross border commerce, increase certainty in commercial transactions and decrease their costs. The CISG thus supports sustainable economic development in general, and because risks and costs are disproportionately felt by small and medium-sized enterprises, is of particular benefit in promoting cross-border commercial activities on their part.

The CISG has been adopted by 93 States from all legal traditions and levels of economic development and that together represent over two-thirds of the global economy. The UNCITRAL Secretariat is organising a series of awareness-raising events and technical assistance activities to celebrate the 40th anniversary of the CISG in 2020 (“CISG@40”). The CISG@40 activities pursue several goals. One of them is to identify potential new States parties to the CISG, to support and promote the treaty adoption process, namely to accelerate the achievement of the symbolic number of 100 States parties, and to broaden CISG coverage by supporting the withdrawal of declarations and the territorial extensions for existing States parties. Secondly, as regards use in practice, the challenge is to raise awareness of the CISG’s benefits in the commercial environment and among the judiciary on its uniform interpretation. One important component of this line of activity is broadening and deepening contributors’ commitment to the Case law on UNCITRAL Texts (“CLOUT”) system and to involve new partners in the CLOUT network. In this framework, the publication in 2020 of a Guide on International Commercial Contracts (with a focus on sales) (prepared jointly by UNCITRAL, the International Institute for the Unification of Private Law (Unidroit) and the Hague Conference on Private International Law) stands out. Additional topics relevant for CISG@40 include the use of the CISG as a model for national law reform, the broader adoption and use of closely-related treaties such as the Limitation Convention and the Electronic Communications Convention, and matters relating to the use of the CISG in the digital economy such as the relationship between the CISG and smart contracts.


  • The Hong Kong Department of Justice will be holding a briefing session on the CISG titled The CISG in Hong Kong -- What good is it for my business? on 8 January 2020. The session will introduce the CISG, will discuss its salient features, and will explore the pros and cons of applying the CISG to Hong Kong. Read more about the session and how to register here.
  • With its accession to the United Nations Convention on Contracts for the International Sale of Goods (CISG), Guatemala has become the ninety-third State Party to the Convention. Read the press release here.
  • CLOUT Issue 200 is now available online. It includes seven abstracts on the CISG, one on the Limitation Convention, one on the Electronic Communications Convention and one on the Model Law on Electronic Signatures. The cases are from Australia, Denmark, France, Poland and the USA and include recent decisions from the French, Polish and Swiss Supreme Courts on the CISG, as well as judicial guidance on the requirements for legal recognition of electronic signatures. Thanks to Joseph Lookofsky, National Correspondent for Denmark, Ulrich Schroeter, National Correspondent for Switzerland, Claude Witz, National Correspondent for France, Maciej Kochanowski and Björn Schümann for their collaboration.
  • The Lao People's Democratic Republic is the latest State to accede to the United Nations Convention on Contracts for the International Sale of Goods (CISG). They are the ninety-second State Party to the Convention. Read the press release from the event here.

Additional Resources

The text of the CISG together with an Explanatory Note is available on the UNCITRAL website in all official United Nations languages.

The authoritative status of the CISG is available in the United Nations Treaty Collection.

The Case Law on UNCITRAL Texts (CLOUT) system contains about 1000 cases on the CISG and related texts. They are available in the CLOUT database. Moreover, the UNCITRAL Digest of Case Law on the United Nations Convention on Contracts for the International Sale of Goods presents judicial and arbitral decisions in a clear, consolidated and comprehensive manner.

The UNCITRAL Library Online Catalogue contains more than 1000 citations of books, articles and other materials discussing the CISG and related texts. Materials available online include the publication “Thirty-five Years of Uniform Sales Law: Trends and Perspectives, Proceedings of the High-Level Panel held during the Forty-eighth Session of the United Nations Commission on International Trade Law, Vienna, 6 July 2015”.

UNCITRAL has prepared other texts in the field of international sales of goods and related transactions. Among them, the Convention on the Limitation Period in the International Sale of Goods (New York, 1974) and the United Nations Convention on the Use of Electronic Communications in International Contracts (New York, 2005) are particularly significant.

CISG@40 Events

Zagreb International Conference on the Law of Obligations
Zagreb, Croatia
12-13 December 2019
The conference is organised by the Department of Law at the University of Zagreb, Faculty of Economics and Business and is organised in the framework of the celebrations of the UNCITRAL Secretariat for the fortieth anniversary of the CISG. 
CISG Advisory Council/Universidad Panamericana Guadalajara CISG Conference
Guadalajara, Mexico
6 February 2020
The Universidad Panamericana, Guadalajara will host a CISG conference, in coordination with the 27th CISG Advisory Council Meeting. The theme of the conference is "5th Conference on International Arbitration and the UN Convention for the International Sale of Goods -- Celebrating the 40th Anniversary of the Enactment of the CISG".
Vis Moot Court East CISG@40 Programme
Hong Kong, PRC
22 March 2020
Flagship CISG@40 event co-organized with the Hong Kong Department of Justice on the eve of the Vis Moot Court East competition. 
Vis Moot Court CISG@40 Programme
Vienna, Austria
2 April 2020
Flagship CISG@40 event coordinated with the Austrian Ministry of Justice and Ministry of Foreign Affairs on the eve of the Vis Moot Court competition.
CISG: 40 Years and Still Going Strong?
Vienna, Austria
3 April 2020
The University of Vienna, Faculty of Law will host a day-long pre-Vis Moot conference on the CISG@40 to look at open issues relating to the CISG.
St. Petersburg International Legal Forum
St. Petersburg, Russia
19-23 May 2020
Multiple panels will discuss different aspects of the CISG.

View all events here.