You also cannot allow voting directly on the Facebook website using the “like” button. Although, liking your Facebook page can give people access to the entry form. In addition making a notification of winnings using Facebook is prohibited.
A fine print stating that your promo is in no way sponsored, endorsed or administered by, or associated with Facebook should be visible to all participants or Fanpage visitors.
For the best promo such as a photo contest it is ideal to get a Third-party applications which capable to upload content directly to your Fansite. But you can only do this with PRIOR WRITTEN APPROVAL from Facebook.
You can read the new Facebook rules on giveaways, promotions, drawings and sweepstakes here .
Be sure to follow Facebook promotion guidelines. We heard cases that Facebook banned a Fansite with 100,000 likes. It could cost you alot of time and money to rebuild your followers.
Remember that this is Facebook's service, and it can do what it wants with it.
