REACH THE WHOLE WORLD!
The actual form, where users input and submit any required information to access the offer. Include content that further explains the offer; add form fields to collect any information you want; or use a custom HTML form for the ultimate level of customization.
Require users to Like your Page before they can proceed. The content should encourage non-fans to click "Like" for access to the fan-exclusive offer. This is a call to action; be convincing!