Abstract. The birth of the World Wide Web (WWW) in 1993, particularly its graphical user interface, offered marketers opportunities that were previously unimaginable. The WWW allows advanced marketing activities and more particularly interactive marketing, as the user is actively involved in responding to the vendor’s promotion campaign. Interactive TV, also referred to as iTV, combines the appeal and mass audience of traditional TV with the interactive features such as those currently available on the Web. Although personalisation is a practice used widely on the Internet by many sites, applying personalisation techniques over interactive television presents a number of difficulties. In this paper we focus on the design and testing process of the User Interface (UI) for the Interactive & Personalized Advertisement TV viewer. We argue that there are a lot of challenges involved in the designing of interactive TV applications. These are related with the differences of the medium from the traditional PC based Information Systems in terms of input and output devices, viewing environment, number of users and low level of expertise in PC usage.