From Facebook Developer Wiki

Can someone explain here where it redirects to after user hits Send or Cancel - 666135104 06:25, 1 August 2007 (PDT)

From the sample code section: «Facebook will redirect the user back to the application's callback URL after displaying the confirmation dialog. By appending the &next=my-redirect string to the $confirmURL you can make it visit some other place within your callback namespace»

What happens to the extra invites that get sent per user per day? do they roll over? or are they removed?

[edit] iframe invites

once this is removed, how are iframe applications supposed to invite new users?

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> I have the same problem, i want to send invitation from iframe, but it's impossible, please enable this feature for iframe users.

You can use XFBML to send a request form through an iframe. Read this blog post for details. --Pete (User:563683308)

So I need to load XFBML -js-spaghetti just to be able to invite users? That makes completely no sense at all. There should be an API call. --537424580 07:07, 17 May 2009 (PDT)

Got it. I can't send app_to_user notifications before the user has installed my app. But I can use user_to_user notifications, which was enough for my purposes. Now it even makes sense! --537424580 20:37, 17 May 2009 (PDT)

[edit] Always requires confirmation?

In the docs it states that no confirmation is required when sending between two users who have both installed the app - but I am getting a confirmation URL returned whether the friend is a fellow app user or not. Ignoring the URL just results in the notification request not being sent.

Has this function changed?