Avoid Duplicate respondents

Question

Hi Everyone,I have to use individual link as well as anonymous link, both in the same project and we need to make sure that if a respondent received both links, he/she should only be able to complete the survey once and not with both the links. Is there any way to achieve thisThanks,Salim

rondev · Answer

One of the possible method is to create contact list trigger(update contact), which will update an embedded data (isSurveyCompleted) to 1 in the distributed contact list. At the start of the survey flow add branch logic and check - if isSurveyCompleted is equal to 1 then EOS with required message else continue with survey. Obviously, in order to do this we need to have a text entry email validated question at the start of survey only for anonymous link (use display logic on URL params ) with an authenticator (on distributed contact list) in survey flow. If the person gets authenticated, we will perform above mentioned logic else the respondent is new, we can continue with survey.

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