This assignment examines the principle of 'intention to create legal relations' in contract law. It uses the landmark case *Carlill v. Carbolic Smoke Ball Co.* to illustrate how courts determine whether a legally binding agreement exists, even in the absence of traditional bargained-for exchange (consideration). The analysis delves into the historical development of this concept and its application in Australian jurisprudence, ultimately concluding that the case provides valuable guidance for resolving ambiguity in commercial transactions.