Can an automatic redirection be made on our thank you page?

Another Doubt : Include automatic redirection after a few seconds , on the same screen below the image ?

Usually that would not be possible, but it might be possible due to the way you have used to embed the form on your website: stipesquisa.esy.es

What I would suggest to try is the following JavaScript code:

 <script type="text/javascript">
      window.handleIFrameMessage = function(e) {
        var args = e.data.split(":");
        var iframe = document.getElementById("JotFormIFrame");
        if (!iframe)
          return;
        switch (args[0]) {
          case "scrollIntoView":
            iframe.scrollIntoView();
            break;
          case "setHeight":
            if(args[1] == 437){
          customHeight = 600;
          }else{
          customHeight = args[1];
          }
            iframe.style.height = customHeight + "px";
            break;
          case "collapseErrorPage":
            if (iframe.clientHeight > window.innerHeight) {
              iframe.style.height = window.innerHeight + "px";
            }
            break;
          case "reloadPage":
            window.location.reload();
            break;
        }
        var isJotForm = (e.origin.indexOf("jotform") > -1) ? true : false;
        if(isJotForm && "contentWindow" in iframe && "postMessage" in iframe.contentWindow) {
          var urls = {"docurl":encodeURIComponent(document.URL),"referrer":encodeURIComponent(document.referrer)};
          iframe.contentWindow.postMessage(JSON.stringify({"type":"urls","value":urls}), "*");
        }
        var isThankyou = (e.origin.indexOf('submit') > -1) ? true:false;
        if(isThankyou) { setTimeout( function() { window.location.replace('VALID LINK TO REDIRECT TO'); } , 3000); }
      };
      if (window.addEventListener) {
        window.addEventListener("message", handleIFrameMessage, false);
      } else if (window.attachEvent) {
        window.attachEvent("onmessage", handleIFrameMessage);
      }
      if(window.location.href && window.location.href.indexOf("?") > -1) {
        var ifr = document.getElementById("JotFormIFrame");
        var get = window.location.href.substr(window.location.href.indexOf("?") + 1);
        if(ifr && get.length > 0) {
          var src = ifr.src;
          src = src.indexOf("?") > -1 ? src + "&" + get : src  + "?" + get;
          ifr.src = src;
        }
      }
      </script>

- This code should go instead of the current Javascript code - the one right under the iframe code on your page.

I had made it check if it is the thank you page and then if it is, to redirect after 3 seconds.

It is however important to change VALID LINK TO REDIRECT TO above to the actual link to avoid any issues and the reason why I had set it to 3 seconds is to allow the thank you page to load, otherwise it would do it too quickly.

Please do test it out and let us know how it goes.

Everything functioning normally .. Thank you very much the same . 

I thank you

On behalf of my colleague, you are welcome :)

If you have other questions or concerns, please do let us know.

Thanks and warm regards.