Abstract: A method for determining whether clicks on results in a search are fraudulent is provided. The method includes monitoring a pattern of clicks on links presented to a user as a result of a search request by the user; and conducting additional analysis of the links clicked on by the user if the monitored pattern of clicks falls within pre-determined parameters. A second method of detecting click fraud is also provided. The method includes: monitoring links clicked on by a user; adjusting search results presented to a user in response to a user's search when the user clicks on links associated with the search results in a pattern that fall within pre-determined parameters.