Yunus Emre Ay

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While a breach of contract implies the failure of one party to fulfil the obligations arising from the contract, the fundamental breach of contract is an aggravated form of breach of contract. The concept of the fundamental breach of contract of sale is recognized in Article 25 of the CISG (UN Convention on Contracts for the International Sale of Goods, 1980). In an ordinary breach of contract of sales, the applicable legal remedies are ordinary legal remedies (such as substitution of goods, damages). In case of a fundamental (substantial) breach, the unilateral declaration of termination of the contract of sale is used as the last resort (to void the contract). Given that it is perceived as a special aggravated type of breach of contract of sale, the fundamental breach has to be carefully analysed in more detail.


Contract of sale, breach of contract, CISG

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Ahmed, B. A., Hussein H. M. (2017). Avoidance of Contract as a Remedy under CISG and SGA: Comparative Analysis, Journal of Law, Policy and Globalization, Vol.61, 2017, pp. 126-142.

Agapiou, N. (2016). Buyer’s Remedies under the CISG and English Sales Law: A Comparative Analysis, University of Leicester School of Law, PhD Thesis, 2016, 223 pages.

Atamer, Y. M. (2005). Uluslararası Satım Sözleşmelerine İlişkin Birleşmiş Milletler Antlaşması/CISG (The Seller's Obligations and the Consequences of Breaching the Contract of Sale under the CISG), Uyarınca Satıcının Yükümlülükleri ve Sözleşmeye Aykırılığın Sonuçları, 1. Bası, Beta Yayınları, İstanbul, 2005, 546 pages.

Ay, Y. E. (2021). The Scope of the Convention on International Sale of Goods, Uluslararası Ticaret ve Tahkim Hukuku Dergisi/ Journal of International Trade and Arbitration Law, Volume:10, Issue:1, 2021, pp. 135-154.

Can, H., Tuna, E. (2019). Sınıraşan Sözleşmelere İlişkin Meseleler Gümrükten Geçmeyen Mallardan Kaynaklanan Hukuki Sorumluluğa İlişkin Bir Vaka İncelemesi (Issues Related to International Contracts: A Case Study of Legal Liability Arising from Non-customs Goods), Dokuz Eylül Üniversitesi Hukuk Fakültesi Dergisi, Volume:19, Issue:2, 2019, pp. 2161-2203

Chen, M. M., Pair L, M. (2011). Chapter 35: Avoidance for non-Conformity of Goods under Art. 49(1)(A) CISG, in: Liber Amicorum Eric Bergsten International Arbitration and Commercial Law: Synergy, Convergence and Evolution, eds S. Kröll, L.A. Mistelis, P. Perales Viscasillas, V. Rogers, Kluwer Law International, 2011, pp. 655-676.

Duncan, J. C. Jr (2000). Nachfrist Was Ist? Thinking Globally and Acting Locally: Considering Time Extension Principles of the UN Convention on Contracts for the International Sale of Goods in Revising the Uniform Commercial Code, BYU Law Review, Vol:2000, Issue:4, 2000, pp. 1362-1411.

Koch, R. (1998). The Concept of Fundamental Breach of Contract under the United Nations Convention on Contracts for the International Sale of Goods, LLM Dissertation, Supervisor: David Stevens, McGill University Faculty of Law, 1998, 157 pages.

Huber, P., Mullis, A. (2007). The CISG: A New Textbook for Students and Practitioners, European Law Publishers, 2007, 408 pages.

Magnus, U. (2005). The Remedy of Avoidance of Contract under CISG – General Remarks and Special Cases, Journal of Law and Commerce, Vol:25, 2005, pages 423-436.

Ishida, Y. (2020). Identifying Fundamental Breach of Article 25 and 49 of the CISG: The Good Faith Duty of Collaborative Efforts to Cure Defects – Make the Parties Draw a Line in the Sand of Substantiality, Michigan Journal of International Law, Vol.41, Issue:1, 2020, pp. 63-108.

Jovicic, K. (2018). The Concept of the Fundamental Breach of Contract in the CISG, Strani pravni zivot/Foreign Legal Life, Issue:4, Belgrade, 2018, pp. 39-50.

Pamboukis, Ch. (2005). The Concept and Function of Usages in the United Nations Convention on the International Sale of Goods, Journal of Law and Commerce, Vol:25, Issue:1, 2005, pp.107-131.

Ruangvichathorn, J. (2020). The Harmonization of ASEAN Sales Law: A Comparative Study with Thai Sales Law and CISG, Thammasat Law Journal, Vol.49, No.1, 2020, pp. 131-147.

Sayın, C. (2019). Viyana Satım Sözleşmesinde Satıcının Ayıptan Doğan Sorumluluğu (Liability of the Seller for Default in the Convention on International Sale of Goods), LLM Thesis, Ankara University Faculty of Law, Ankara, 2019, 186 pages.

Taştan, F. G. (2019). Viyana Satım Antlaşmasına (CISG) Göre Alıcının Sözleşmeyi İhlali Halinde Satıcının Hakları (The Seller's Rights in Case of Buyer's Breach of Contract under the CISG), Yıldırım Beyazıt Hukuk Dergisi, Year:3, Issue:1, 2019, pp. 387-388.

Toker, Ali Gümrah (2016). Viyana Satım Sözleşmesi (CISG) Uyarınca Sözleşmenin Esaslı İhlali (Fundamental Breach of Contract under the CISG), Public and Private International Law Bulletin, Volume:33, Issue:1, 2016, pp. 213-250.



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