When adding custom fields to a form, there can be some confusion regarding what values are saved when a form is submitted. The custom field that often inspires the most debate is arguably the single checkbox. Here's an inside peak into what IS saved, and what isn't.
If someone selects or 'checks' a single checkbox, the value that is saved to Eloqua is "on". This can be found by navigating to the submitted form and then clicking on the action gear drop-down and selecting View Submission Data:
If someone does NOT select a single checkbox, or leaves the checkbox 'unchecked', there is no value saved to Eloqua:
So, if you are making a processing step conditional, based on someone selecting or not selecting a checkbox, you'd configure it as "on" for any conditions dependent on it being checked...
and you have TWO options for configuring a condition dependent on a single checkbox NOT being checked:
1. not exactly "on":
2. exactly "blank" (the text field is left empty):