The use of the internet is growing so rapidly that businesses are more inclined to use online services to market their website-based business products. Business executives' foresight to use business facilities via the internet in the form of transactions, online boutiques, promotions and other businesses is urgently needed. This study aims to obtain an overview of the validity of electronic trading transaction agreements via the internet based on a review of contract law in Indonesia contained in the Civil Code and to find out the types of protection from legal aspects obtained for business users in trading transactions via the internet.

This legal research is descriptive in nature with qualitative research methods, so it is classified as a normative research type, so that the research data is processed by qualitative analysis. From the results of data analysis obtained that: 1). Based on the application of contract law in Indonesia, the contract for trading business actors' transactions via the internet is considered valid 2). With the existence of UUPK and UUIT can provide a proper legal protection for consumers, 3). If there is a dispute between business executors, the business executor can take legal action in two ways, namely settlement by international legal channels and legal channels (litigation routes) and non-litigation routes. Based on the results of the research, it can be explained that first, Law No. 8 of 1999 concerning consumer protection has not been able to protect consumer rights, because there are limitations in interpreting business operations that are specifically domiciled in the territory of the Republic of Indonesia, as well as limited consumer rights in UUPK. Second, it is necessary to regulate several aspects, namely aspects of transactions, business actors, consumers and types of products which in consumer protection law should regulate several aspects related to the goods offered. Third, there is no institution that guarantees the existence of online transactions.