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I imagine it's no different from the previous method of sending HTTP PoAsked by kawchar on January 16, 2014 at 12:37 PM
I imagine it's no different from the previous method of sending HTTP Post data via the Thank You page. With this method, you no longer have to create a custom Thank-you page.
This is a re-post of a comment on Send Instant Submission Notifications with Webhooks
JotForm Support Manager
Your assumption is correct.