For websites that collect data from users (for ex: site registration) and/or for sites that provide a service, there are 2 major legal documents to be used: "Terms of Service" and "Privacy Policy".
They simply show the users "how their data will be used" and "rights of both sides regarding the usage of the service".
Termsfeed is a free and web-based application for generating "Terms of Service" and "Privacy Policy" documents on-the-fly.
You simply mention few variables like the company name, URL, etc. and get the output as a well-formatted HTML.
The documents created covers the most common stuff, you may want to customize it for you needs but they are a good starting point.
Also, optionally, Termsfeed can notify you when an update happens to the documents.
