The main problem of today and modern consumer life is the lack of time and improper consumer information, which leads to unfair business practices. If consumers are properly and fully informed then they can make decisions that suit their needs. It should also be stressed the importance of the function ing of the legal rules and the institutions implementing them. Unfair practices are not only applied by traders in the advertising and marketing phase, but also when brokering and direct purchases, whether it is the sale of services and products, as well as after the deal has been concluded. It also not only applies to consumers, but also to traders to each other. The status of consumers compared to previous times has been greatly improved by greater information and the entry of the Republic of Croatia into the European Union, which adopts the rules which Member States are obliged to implement. Directive 2005/29 seeks to prevent the limitation and minimisation of unfair commercial practices that infringe consumers' rights either in relation to contractual te rms or marketing practices that mislead or are aggressive. In the Republic of Croatia, the provisions on unfair commercial practices are contained in the general Consumer Protection Act. The Court of Justice of the EU has played a major role in the effective implementation of unfair business practices rules, which interpreted the provisions of Directive 2005/29 broadly in favour of consumers.