How to avoid duplicate submissions coming from the same respondent

Is there a way to delete duplications of forms automatically or reject those who try to submit a form that has already been submitted?

Yes, it is possible to prevent duplicate submissions coming from the same respondent in your form.

Please see these guides for more information:

How-to-Set-Unique-Submissions-on-a-Form

How-to-set-Form-Limits-Based-on-a-Unique-Question

How-to-Have-Unique-Question-Using-Multiple-Fields

If you have other questions, please do not hesitate to get back to us and we will be glad to help you.