A research shows that, in the face of new business practices presented by today’s world, remarkably in the field of technology and biomedicine, the traditional concept of legal business has been insufficient. The study, based on the deductive method, shows that some unnormalised facts create legal situations which do not in themselves give rise to subjective rights, but interests that deserve equal protection, especially those relating to personality, as an expression of the principle of human dignity. Finally, it must be concluded from a contemporary perspective that the traditional and modern legal transaction, triangulated by individuals with subjective rights and objects backed up by law, is insufficient to satisfy the new claims, particularly those of an existential nature, which requires the concepts of legal relationship, legal situation and legal transaction, which are fundamental to private law.