How to prevent multiple submissions?

I have set Unique Submissions on a form, but I'm still receiving multiple submissions when a different device is used with the same email address. If I try submitting the form with the same email from the same device, it works fine and prevents multiple submissions. Can you help me find a solution to prevent multiple submissions from different devices using the same email?

i have set the form to only receive unique submission.

Hi Virbiz,

Thanks for reaching out to Jotform Support. The Unique Submission feature can only prevent submissions from the same network, and browser. However, I also see that you're using the Unique Field feature. This will automatically block the submission if, in your form's case, the email address entered has already been received in the past. This validation works on any device/network.

Please try making two test submissions on your form, using two same email addresses and the second submission shouldn't go through.

Give it a try and let us know if you need any help.

Hi Raymond, currently i dont have any issue if i use the same email and same device. The submission didnt go through.

The issue that i face currently is when i tried submit using the same email but using different device. The submission still go through

Hi Virbiz,

When I cloned and tested your form, everything worked the way it was supposed to. Take a look at the screenshot below to see my results:

I have also cleared your form caches just in case. Can you go ahead and try it again and let us know how it goes? If the same thing happens again, can we send a test submission to your form to see what is causing the problem?

Once we hear back from you, we’ll have a better idea of what’s going on and how to help.

Hi Connor, i still received the same issue.

https://www.jotform.com/242341010901034 - here's our form. You can try and test it out

Hi Virbiz,

I made a submission on your form to try and replicate the issue. The first one was from my mobile device using a mobile internet. However, when attempting to do another submission using a desktop computer with a different internet connection, it didn't allow me as I used the same email address. The behavior seems to be working as expected. Please check out the screenshot below for my result:

When you're making your tests, please ensure that you're using an email address that is already existing in your tables, and it won't allow you to make another submission, regardless of the device or internet used.

Reach out again if you need any help.

i checked if the email got any white space or any typo but no issue from there

Hi Virbiz,

It appears that the Unique Field feature was recently updated after the submissions were made.

If the feature was not enabled before the submissions were made, they would be accepted as expected. If you're no longer able to replicate the issue as we couldn't, the feature is now working correctly and will not accept duplicate email addresses moving forward.

Reach out again if you need any help.