How do I prevent someone from filling out the survey multiple times. Also, how do they get disqualified from receiving the code if they only partially fill out the survey? I don’t want to make the whole survey required questions.
SurveyGizmo has a Duplicate Protection feature that could be a good option for you:
Could you share some more information about the ‘code’ that you are referring to? You may want to explore SurveyGizmo’s disqualify action to see if it might work for you:
Hope this helps!