How to prevent social media swarm responses to a survey? | Experience Community
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How to prevent social media swarm responses to a survey?

  • April 28, 2026
  • 1 reply
  • 29 views
J
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The usual duplication (ballot box stuffing) detection prevents multiple responses from the same user for pre-survey exclusion, or requires that the user complete the survey and be excluded/flagged afterward after the response appears to be a duplicate. We have recently encountered a different issue that we would like to prevent in the future. We provide anonymous links with an access code, but someone posted their code to social media. How can we limit the number of responses per code? I’ve poked around in workflow and survey flow but found nothing that seems to be suitable.

1 reply

Lpena
Qualtrics Employee
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  • Lpena
  • Qualtrics Employee
  • May 13, 2026

Hey, currently, Qualtrics doesn't have a native "one-and-done" toggle for specific access codes within an anonymous link, but there are a few ways to handle it.

The most robust method is using an Authenticator in your survey flow. By capturing the access code as embedded data and checking it against a contacts list, you can block a code once it's been used. This does lean a bit into the non-anonymous side since you're tracking against a list, but it’s the most effective gatekeeper.

If you need to stay strictly anonymous, you might consider using the "Prevent Multiple Submissions" security setting to drop a cookie   on the respondent's browser, or simply use a Workflow to flag duplicate codes for removal after the data comes in. You could, also add a CAPTCHA to the entry page to keep things tidy from a bot perspective.

This reply contains AI usage for clarity and language purposes.
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