Almost all sites that have a voting or poll function provide several ways to check for the uniqueness of IP-votes. Some people come up with a large number of authorization steps in order to identify the user and verify his reality. Others suggest filling out additional fields in order to collect as much information as possible about a person. But most often, a user is authenticated by determining his IP address get votes.

Sites are gaining more and more popularity, where you can log in not only using the standard form for entering a username and password. Administrators came up with a more advanced way to avoid fraud and added to their pages login forms to the site through popular social networks — VKontakte, Facebook, Odnoklassniki, Google+ and others.