I m workin a projet and the marketing dep have the clever idea to a "invite friend" (apprequest) dialog on the website (with facebook connect)
I would if it is possible , as I read that on the facebook online docs
Requests are only available for Desktop Canvas apps and not website
However, the dialog displays anyway , but no notification are sent.
You'd have to have a canvas implementation in order for the requests to be displayed and for users to be able to accept them.
If you can't do this, maybe look at using the Feed Dialog for an alternative way to get a user to post a link to your app
Others may suggest setting up a canvas URL solely to redirect back to the website but be aware that that's against Facebook policy I.12