diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 73eb7d95..5a15b53f 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -74,6 +74,11 @@
     "description": ""
   },
 
+  "chatgpt_user_not_logged_in": {
+    "message": "You are not logged in to ChatGPT. Please log in with your credentials, close the ChatGPT window, and then repeat the action you attempted. You will remain logged in afterwards.",
+    "description": ""
+  },
+
   "prefs_OptionText_chatgpt_win_text": {
     "message": "ChatGPT window dimensions",
     "description": ""
diff --git a/_locales/it/messages.json b/_locales/it/messages.json
index b5c7c5c0..d6841de7 100644
--- a/_locales/it/messages.json
+++ b/_locales/it/messages.json
@@ -74,6 +74,11 @@
     "description": ""
   },
 
+  "chatgpt_user_not_logged_in": {
+    "message": "Non sei connesso a ChatGPT. Effettua l'accesso con le tue credenziali, chiudi la finestra di ChatGPT e poi ripeti l'azione che avevi tentato. Rimarrai connesso in seguito.",
+    "description": ""
+  },
+
   "prefs_OptionText_chatgpt_win_text": {
     "message": "Dimensioni della finestra di ChatGPT",
     "description": ""
diff --git a/js/mzta-chatgpt.js b/js/mzta-chatgpt.js
index f70bc071..17b4720a 100644
--- a/js/mzta-chatgpt.js
+++ b/js/mzta-chatgpt.js
@@ -146,20 +146,26 @@ function operation_done(){
     chatpgt_scrollToBottom();
 }
 
-
+function checkLoggedIn(){
+    return !window.location.href.startsWith('https://chat.openai.com/auth/');
+}
 
 // Nello script di contenuto
 browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
     if (message.command === "chatgpt_send") {
-        addCustomDiv(message.action,message.tabId);
-        //console.log(message.prompt);
-        (async () => {
-            //await chatgpt.isLoaded();
-            await chatgpt_sendMsg(message.prompt,'click');
-            await chatgpt_isIdle();
-            // console.log(response);
-            operation_done();
-        })();
+        if(!checkLoggedIn()){
+            // User not logged in
+            alert(browser.i18n.getMessage("chatgpt_user_not_logged_in"));
+        }else{
+            addCustomDiv(message.action,message.tabId);
+            (async () => {
+                //await chatgpt.isLoaded();
+                await chatgpt_sendMsg(message.prompt,'click');
+                await chatgpt_isIdle();
+                // console.log(response);
+                operation_done();
+            })();
+        }
     }
 });