Unfair competition in the form denigrate the competitor in the legal system in Iran and France

One example of unfair competition is, competition through discredit a competitor. French doctrine and precedent has been accepted and explained this legal entity. But the richness of the Iranian legal literature on this subject is not enough. Therefore, in this paper a review of unfair competition, while explaining the concept and its variants, and based on the analysis of the resulting liability is paid. In French law, it is necessary to realize discredit, being dismissive of rival publications , as well as the possibility of identifying who is denigrate for the audience. But the accuracy of these statements is not important. in the French legal system liability caused by discredit a competitor is based on fault. The Iranian legal system is same, but the liability can be established based on the principle sans fault. It is evident that selection of base has influence on the terms and Scope of responsibility.