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You can ask people to like your page
You can ask people to like your page as part of your competition.
But you can’t ask people to like posts, photos or comment
But you can’t ask people to like a status or a photo or a link or leave a comment on a status or a photo or a link as part of a competition.
You can’t use the Facebook messaging system to notify winners
You have to contact winners outside of Facebook, so don’t use tagging or messenger to let people know
Your competition can’t be on your Facebook wall.
You have to use an app or a custom tab to run your competition.
You need a disclaimer
You are also required to have a disclaimer letting people know that the promotion isn’t associated with or endorsed by, administered by Facebook.
