My application allows user to send out Facebook's invitation to their friends. Now, how can I track the number of users who sign up due to receiving an invitation from a particular user?





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When your application sent out the invitation, you should have formatted the "content" parameter in the fb:request-form by specifying the buttons to be included in the request. You can consider to include the sender's Facebook user ID as part of the query string.

With that, your application should be able to track what you want.



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