The Internet network not only allows information to be exchanged and offers companies a new showcase capable of promoting their activity beyond their traditional area of ¿¿influence. It is also a new tool for signing contracts and thus creating legal relationships. In this case, we are talking about electronic commerce, which can be defined as all digitized exchanges, linked to commercial activities, between companies, between companies and individuals or between companies and the administration. Distance selling is an old marketing technique which, thanks to the performance of means of distance communication, the simplification of ordering processes, an acceleration of delivery times, a massive incentive for credit and the development of services distance financial, has enjoyed great success in the past three decades. The very essence of e-commerce, the conclusion of contracts by electronic means gives them their common characteristics.