Abstract The development of the Common Frame of Reference is a highly prominent topic on the agenda of European integration. However, its underlying procedures have had only limited investigation. This article discusses the European private law project by inquiring into the drafting experiences of four other private law legislative processes, with a focus on sales law. These instruments concern Article 2 (on sales) of the American Uniform Commercial Code, the Vienna Sales Convention, the Dutch Civil Code and the Directive on Consumer Sales and Associated Guarantees. Ultimately, the article asks what can the European project learn from these experiences.