Re: Prevent Multiple Submissions from Anonymous Responders

Home Forum Deploying and Filling In Forms Prevent Multiple Submissions from Anonymous Responders Re: Prevent Multiple Submissions from Anonymous Responders

#4662

ijobling
Participant

The only way to prevent multiple submissions is to be able to identify who has submitted in the past, and that by its nature precludes anonymity.

Even if you were able to detect the IP address you would have issues. Consider users working in the same company (or even small home) network. they would all present the same IP address

but passing out a unique URL to the form using the method you have seen here whereby you are preloading to a field on your form is one way to do this. Users could load the form by editing the URL perhaps, but you can then exclude any data submitted from your final analysis where your ‘field’ does not contain the information you expect.