Hi @joswp

I hope you are doing well.

We do have this feature already requested, and I’m adding this ticket as an extra request.

I can see our developers have a custom code that maybe help you on this.

How long would you like to avoid the new submissions?

The code is set to 24 hours based on the IP, but we can increase this time.

Best Regards
Patrick Freitas

Hello @joswp ,

Please check this MU plugin:

<?php

add_action( 'forminator_quizzes_submit_before_set_fields', function($entry){
    $entry->set_fields(
        array(
            array(
                'name'  => '_forminator_user_ip',
                'value' => Forminator_Geo::get_user_ip(),
            )
        )
    );
});

add_action(    'forminator_before_submit_quizzes',    function( $form_model ) {
        $form_id = $form_model->id;
        $form_ids = array( 69, 74, 20 ); // IDs of the Quizes for disabling submission

        if ( in_array( intval( $form_id ), $form_ids, true ) ) {

            $user_ip = Forminator_Geo::get_user_ip();

            if ( ! empty( $user_ip ) ) {
                $last_entry = Forminator_Form_Entry_Model::get_last_entry_by_ip_and_form( $form_id, $user_ip );

                if ( ! empty( $last_entry ) ) {
                    $entry        = Forminator_API::get_entry( $form_id, $last_entry );
                    $current_time = strtotime( date( 'Y-m-d H:i:s' ) );
                    $future_time  = strtotime( '+1 day', strtotime( $entry->date_created_sql ) );

                    if ( $current_time < $future_time ) {
                         wp_send_json_success(
				            array(
				                'result'     => 'You cannot submit this quiz within 24 hours after submitting once!',
				                'result_url' => '',
				                'type'       => 'nowrong',
				            )
				        );
                    }
                }
            }

        }

    },
    15
);

Open that PHP file with any code editor. In line number 16, add your quiz id(s) separated with comma (,) for which you want to disable posting for the desired time after submitting one.
The time you can change in the line 28, by changing the number of days:

$future_time = strtotime( '+1 day', strtotime( $entry->date_created_sql ) );

How to use Must Use (MU) plugins https://wordpress.org/support/article/must-use-plugins/

kind regards,
Kasia