The rules changed on 11 May 2011 – your promotion may already be in breach, read the following carefully:
Promote in apps only: You can now run promotions only within Apps, either within a Canvas Page, Page Tab or App.
No Like button or Check Ins: You may not use Facebook features like the Like button or a Place check in as the entry or registration mechanism.
- You are responsible: As the legal promoter, you are responsible for ensuring that your actions comply with relevant legislation covering considerations like official rules and terms and eligibility requirements.
- Facebook is not responsible: You must exempt Facebook from all responsibility and association with the activity in your terms and conditions, and declare what data you will receive and how it will be used.
Full rules from Facebook are available online here: https://www.facebook.com/promotions_guidelines.php