Art. 51 CISG

(1) If the seller delivers only a part of the goods or if only a part of the goods delivered is in conformity with the contract, articles 46 to 50 apply in respect of the part which is missing or which does not conform.

(2) The buyer may declare the contract avoided in its entirety only if the failure to make delivery completely or in conformity with the contract amounts to a fundamental breach of the contract.

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Secretariat Commentary

The Secretariat Commentary on Art. 47 of the 1978 New York Draft, predecessor to Art. 51 CISG, gives insight into the drafters' unterstanding on the eve of the 1980 Vienna Diplomatic Conference.

Commentary on the Draft Convention on Contracts for the International Sale of Goods, prepared by the Secretariat (UN Doc. A/CONF.97/5), in: United Nations Conference on Contracts for the International Sale of Goods, Vienna, 10 March – 11 April 1980, Official Records: Documents of the Conference and Summary Records of the Plenary Meetings and of the Meetings of the Main Committees, New York: United Nations (1991), pp. 14 et seq., at pp. 43—44

Overview of case law on Art. 51 CISG: UNCITRAL Digest

The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.

2016 UNCITRAL Digest of case law on Art. 51 CISG