Tip - Google Webmaster Warning for Unnatural Links - Penguin

If you have received any warning for unnatural links that is a sure shot penguin penalty or if you feel you were involved in such link-building activity, you may need to stop it right away before your website gets harmed. Go back to all spammy directories and social bookmarking sites, forums or blog directories and try removing the links which you can or contact the webmasters to remove them for you.