To use ScamRat, simply go to www.scamrat.org and select what you are searching for. 

Enter in the domain, phone, email or username into the search box and then click the Check button. (Where find the domain/phone/email/username search types here)

You'll then be taken to a page where you can mark the search results as a scam, probable scam or a trusted site/phone/email/social.

You can also view a graph of other user submissions over the last 30 days.

Or write a comment about your experience with the site/phone/email/user.