Locking Prepopulated fields

I have an app that will pass certain "private" values (in hidden fields) in the url to a form that will be used to allow the user to fill other personal details. The problem is that we need to prevent that the user can change these private values by modifying the prepopulated fields in the URL.

Is there a way to achieve this? I tried the read only mode but it doesnt prevent updating the values via de prepopulated field in the url

Thanks in advance!

I don't think it is possible. However, you can compare the value of the first form they submitted to if they change the value on their 2nd form. If they are not the same then they probably edited the 2nd form's pre-populated URL.

https://www.jotform.com/help/351-How-to-Automatically-Pass-Form-Data-to-Another-Form

Thanks! I'll take a look at it.