This website makes use of the highest possible security measures to ensure the complete confidentiality of all communication with our clients. Transactional services are processed through a secure server that uses the Internet security standard SSL (Secure Socket Layer) protocol. The secure server establishes an encoded connection that is only readable between the customer's computer and the Endesa Online server. Using the SSL therefore guarantees:

• that the customer is transmitting his/her information to the EndesaOnline server and not to any other website. 
• that the information transmitted between the customer and the EndesaOnline server is encoded to prevent third parties from reading or manipulating them. 

What’s more, you can make sure that you are within a secure environment by having a look at the url address under “properties” (right click on your mouse). This url address begins with “https” and the “s” means that the content is being offered by a secure server.

You can also see a security icon (padlock) on pages containing forms, whose data is always sent via secure transmission.