Most of the time the link (from the panelprovider) can be used once, so the security is done on their part.
They just pass the respondent to the survey hosted in your Limesurvey.
The link itself will not be shown to the respondent.
If they have completed the survey the ID is send back and recorded as complete on the panelproviders end.
So if that same respondent wants to participate again, their system will not allow to continue and the redirect itself to the limsurvey survey will not work.
Also the respondent will receive only once their incentive.
So there will not be a reason to fill it more than once.
If they do, you can just easily clean (if you can fill int the survey more then once) it afterwards, every double ID will be removed.
Hope that helps, Dennis
They just pass the respondent to the survey hosted in your Limesurvey.
The link itself will not be shown to the respondent.
If they have completed the survey the ID is send back and recorded as complete on the panelproviders end.
So if that same respondent wants to participate again, their system will not allow to continue and the redirect itself to the limsurvey survey will not work.
Also the respondent will receive only once their incentive.
So there will not be a reason to fill it more than once.
If they do, you can just easily clean (if you can fill int the survey more then once) it afterwards, every double ID will be removed.
Hope that helps, Dennis