Art. 21 CISG

(1) A late acceptance is nevertheless effective as an acceptance if without delay the offeror orally so informs the offeree or dispatches a notice to that effect.

(2) If a letter or other writing containing a late acceptance shows that it has been sent in such circumstances that if its transmission had been normal it would have reached the offeror in due time, the late acceptance is effective as an acceptance unless, without delay, the offeror orally informs the offeree that he considers his offer as having lapsed or dispatches a notice to that effect.

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Secretariat Commentary

The Secretariat Commentary on Art. 19 of the 1978 New York Draft, predecessor to Art. 21 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 p. 25

Overview of case law on Art. 21 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. 21 CISG