All intellectual property legislation also created the competition principles, aiming at achieving loyalty in marketing practices. The Competition Law has influence in several acts of the company, even those not necessarily related to IP rights. The several illegal practices for consumer confusion, deviation of clients, passing off and many others are duly provided in our legislation. An economic business that violates the good manners and the economic right in general, in case of competition, may result in losses for the company. A good advisory may perform both in prevention and defense and fight to unfair competitors.