Increasing the quantity and quality of commercial transactions significantly impacts the economic growth of nations. In the business world, contracts play a crucial role. Sometimes, even when one party breaches the contract, they may still be prepared to provide a proper and reasonable performance. At two extremes, a transaction can either be viewed as a battlefield or as a cooperative relationship. The latter perspective is more commonly held by those engaged in the business world. This view, by anticipating a right to cure for the breaching party, grants an opportunity to correct and provide compliant performance. This research aims to conduct a comparative study of the right to cure in the Principles of European Contract Law (PECL) and the United Nations Convention on Contracts for the International Sale of Goods (CISG), while also examining the stance of Iranian domestic law on this matter. This study is theoretical and follows a descriptive-analytical methodology. Necessary information was gathered through library research, including documents, books, and articles. Findings indicate that the right to cure is recognized in both legal systems, albeit with some differences. However, domestic Iranian law does not exhibit a unified approach, though it appears that there is sufficient basis for accepting this institution.