Domain name is understood as the reference electronic address to locate a company, product or service which operates on the Internet, that is, the name which identifies a website. In the same way that an ID document identifies a person, or the image of a trade mark is associated with a product, the domain name represents a denomination used as a reference address to locate a company, a product or service, an individual etc that operates on the Internet. The denomination which makes up the domain name is frequently made up of the company’s business name, a trade mark or any sign which enables the user to locate it. Some persons skilled in the art identify the domain name as a trade mark in the territorial area of the Internet, that is, cyberspace. This declaration offers us an image of the importance of domain names due to the unlimited territorial dimension represented by the Internet.