This article compares and contrasts the doctrine of adequate assurance of performance under the US Uniform Commercial Code (the UCC) and the UN Convention on Contracts for the International Sale of Goods (the CISG). The article argues that, in the context of the CISG, the mechanism of adequate assurance found in the UCC is a faux ami. Despite some similarities, the doctrine of adequate assurance regulated in the CISG is distinct and serves different functions to its UCC counterpart.

The United Kingdom remains one of the world's last industrialized nations not to have adopted the CISG. The UK CISG debate has endured for decades, with existing analysis largely focusing on competition, assessing the relative merits of the CISG and English law. This article's analysis is complementary; focusing instead on coherence, and the private international law implications of UK accession. This article assesses contractual interpretation, and commodity sales, within an overarching private international law framework. Recognizing the necessity of existing competitive analyses, it makes the case for UK CISG accession on the basis of its complementary coherency perspective.