How to avoid re-use of separate survey links | XM Community
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We have used the method described here to collect participants’ identifying information (to award students extra credit for taking a survey) separately from their anonymous responses. Some industrious cheaters have realized that they can copy and distribute the link to the second survey to their colleagues, who can use it to claim extra credit without taking the survey. In one case we had 2/3 more people claiming credit than the number that completed the survey. Is there a way around this? For example, can the links be made unique to the participant and one-time use?

Hi @cormanaz, please have a look at this - Prevent Multiple Submission

Hi @cormanaz, please have a look at this - Prevent Multiple Submission

Thanks. It says this method is do prevent multiple submissions, answering by bots, etc. Will it work if at the end of an anonymous survey I direct students to a separate, non-anonymous survey where the enter information to get their extra credit?

The problem is that students are sharing the link to the second, non-anonymous survey. Nobody would try to take that multiple times. I’m trying to prevent them taking it once without first taking the anonymous survey. I think that would require a cookie being set by the anonymous survey that is read and validated by the non-anonymous one.

@cormanaz you can store some information of the students in a contact list when they complete at the first survey and at the start of the second survey you can validate that information using an authenticator, if the condition satisfies then only allow them to proceed for that second survey.

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