Do not panic if you receive an email about a password recovery. If you receive an unexpected password recovery email it is most likely a mistake by someone trying to recover an account for the wrong username, or on the wrong server. If you believe your account may be compromised, please log into your account manager and change your password to secure your account.
EU West: http://euw.leagueoflegends.com/
EU Nordic East: http://eune.leagueoflegends.com/
Latin America North: http://lan.leagueoflegends.com/
Latin America South: http://las.leagueoflegends.com/