When a form submission is successful, the GiveGab Enterprise Platform automatically passes only the unique confirmation code and the Organization API key to the URL specified in the 'Callback URL' field. This makes for a very 'thin' communication.
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The code that you create which lives at that that  Callback URL can then pass the Confirmation Code, Organization API key and with the addition of a valid User API key, to our 'record.xml' RESTful XML endpoint to retrieve the specific donation  data points, including the donation level or amount, for that individual submission. Then that same code could determine what actions to take next for the specific conditions about the submission.