limit 1 unique email address in the submission

I did by settings that it should only allow 1 entry of an email address by unique question.

However it only pops up the warning when submitting the form which is a hassle that the customer has to fill out the whole form to see that he is limited.

1. how can i move the warning message that on page 1 after entering the email address it should pop up the warning.

2. where do i cahnge the warning text?

Unfortunately, the the unique question filtering will trigger when the form is submitted.

There is no current functionality that will detect the email address for duplicate entries.

For your question 2,

You can change the warning text in your Form Settings.

Here is a guide:https://www.jotform.com/help/61-How-to-Change-Form-Warnings

Hope this information helps.