Contact Form 7 – Prevent Email Sending When Checkbox is Unchecked

Hi Team,

I’m using Contact Form 7 version 5.9.8, and I want to prevent the form from sending emails when a specific checkbox is unchecked. I attempted the following code, but it is not working as expected:

function prevent_email_for_specific_form($contact_form)
{
    $target_form_id = '1238782';

    if ($contact_form->id() !== $target_form_id) {
        return;
    }

    $submission = WPCF7_Submission::get_instance();
    if (!$submission) return;

    $data = $submission->get_posted_data();

    if (empty($data['consent'])) {
        add_filter('wpcf7_skip_mail', '__return_true');
    }
}

add_action('wpcf7_before_send_mail', 'prevent_email_for_specific_form', 10, 1);

Could you please help me identify what might be wrong and suggest a working solution?

Thanks in advance!