E-commerce refers to doing business by electronic means. It has been steadily gaining in importance for many years. Many companies have learned the potential of the internet and keep switching to the electronic commerce. For example, customers can be offered the company’s whole range of products on itswebsite. Purchases and orders are made by means of an online shop located on the website. There are no time limits for making orders: onе can purchase well beyond the „regular business hours“. However, problems may arise while dealing with personal data and data security. Solutions of such problems should be provided by respective companies in advance. Lawyers can advise you in course of the preparation of General Terms and Conditions and Terms of Service. In this way theadvice given beforehand can provide you safe and unlimited market development.