diff --git a/config/helloApi.ts b/config/helloApi.ts
index 0a30c2c0..c360ac02 100644
--- a/config/helloApi.ts
+++ b/config/helloApi.ts
@@ -95,7 +95,38 @@ export async function getAllChannels(): Promise<any> {
       // For anonymous users (msg not sent), use a_clientId if available
       authorization = `${widgetId}:${aClientId}`;
     }
-
+    // Determine if we should send anon_client_uuid for merging
+    const lastUniqueIdKey = `${widgetId}_last_unique_id`;
+    const lastUniqueId = localStorage.getItem(lastUniqueIdKey);
+
+    let anonClientUuidToSend = null;
+
+    if (!unique_id) {
+      console.log("ANONYMOUS CASE");
+      // LOGOUT CASE
+      if (lastUniqueId) {
+        console.log("pehle login tha")
+        // last_unique_id exists → user logged in before → get uuid from last login
+        const lastLoginClientIdKey = `${widgetId}_${lastUniqueId}_k_clientId`;
+        const lastLoginUuid = localStorage.getItem(lastLoginClientIdKey);
+        anonClientUuidToSend = lastLoginUuid;
+        console.log("anonClientUuidToSend", anonClientUuidToSend);
+      }
+    } else {
+      console.log("LOGIN CASE");
+      // LOGIN CASE (has unique_id)
+      if (!lastUniqueId) {
+        console.log("pehle logout tha")
+        // No last_unique_id → first login → send k/a clientId to merge logout chat
+        // No last_unique_id → first login → send logout user's k/a clientId to merge
+        const logoutKClientIdKey = `${widgetId}_k_clientId`;
+        const logoutAClientIdKey = `${widgetId}_a_clientId`;
+        const logoutKClientId = localStorage.getItem(logoutKClientIdKey);
+        const logoutAClientId = localStorage.getItem(logoutAClientIdKey);
+        anonClientUuidToSend = logoutKClientId || logoutAClientId;
+        console.log("anonClientUuidToSend", anonClientUuidToSend);
+      }
+    }
     const response = await axios.post(
       `${HELLO_HOST_URL}/pubnub-channels/list/`,
       {
@@ -104,6 +135,7 @@ export async function getAllChannels(): Promise<any> {
         number,
         unique_id,
         user_data: getUserData(),
+        ...(anonClientUuidToSend ? { anon_client_uuid: anonClientUuidToSend } : {})
         // is_anon: isAnon,
         // ...(isAnon ? { anonymous_client_uuid: aClientId, uuid: aClientId } : {})
       },
@@ -117,6 +149,18 @@ export async function getAllChannels(): Promise<any> {
     // Set the appropriate client ID based on user type
     if (response?.data?.uuid) {
       if (hasUserIdentity) {
+        if (unique_id) {
+          const widgetId = getLocalStorage('WidgetId');
+          console.log("widgetId", widgetId);
+          const lastUniqueIdKey = `${widgetId}_last_unique_id`;
+          console.log("lastunique id", lastUniqueIdKey);
+          const lastUniqueId = localStorage.getItem(lastUniqueIdKey);
+          if (unique_id && unique_id !== lastUniqueId) {
+            localStorage.setItem(lastUniqueIdKey, unique_id);
+          }
+          localStorage.setItem(`${widgetId}_k_clientId`, response.data.uuid);
+          localStorage.setItem(`${widgetId}_a_clientId`, response.data.uuid);
+        }
         setLocalStorage('k_clientId', response.data.uuid);
       } else if (isAnon) {
         setLocalStorage('a_clientId', response.data.uuid);
diff --git a/hooks/HELLO/eventHandlers/embeddingScript/embeddingScriptEventHandler.ts b/hooks/HELLO/eventHandlers/embeddingScript/embeddingScriptEventHandler.ts
index fcff95d9..3f8892d5 100644
--- a/hooks/HELLO/eventHandlers/embeddingScript/embeddingScriptEventHandler.ts
+++ b/hooks/HELLO/eventHandlers/embeddingScript/embeddingScriptEventHandler.ts
@@ -11,7 +11,7 @@ import { setDataInInterfaceRedux } from "@/store/interface/interfaceSlice";
 import { GetSessionStorageData, SetSessionStorage } from "@/utils/ChatbotUtility";
 import { useCustomSelector } from "@/utils/deepCheckSelector";
 import { emitEventToParent } from "@/utils/emitEventsToParent/emitEventsToParent";
-import { cleanObject, removeFromLocalStorage, setLocalStorage } from "@/utils/utilities";
+import { cleanObject, getLocalStorage, removeFromLocalStorage, setLocalStorage } from "@/utils/utilities";
 import isPlainObject from "lodash.isplainobject";
 import { useContext, useEffect, useRef } from "react";
 import { useDispatch } from "react-redux";
@@ -123,8 +123,9 @@ const useHandleHelloEmbeddingScriptEvents = (eventHandler: EmbeddingScriptEventR
             dispatch(setDataInAppInfoReducer({ subThreadId: '', currentChannelId: '', currentChatId: '', currentTeamId: '' }));
         };
 
-        // Reset if widget token changed
-        if (fullWidgetToken !== prevWidgetId) {
+        const isWidgetTokenChanged = fullWidgetToken !== prevWidgetId;
+        // Reset if widget token changed (clears OLD tabSessionId's state)
+        if (isWidgetTokenChanged) {
             resetKeys();
         }
 
@@ -154,6 +155,13 @@ const useHandleHelloEmbeddingScriptEvents = (eventHandler: EmbeddingScriptEventR
             isHelloUser: true,
         }));
 
+        // After updating chatSessionId (which changes the tabSessionId key used by appInfo),
+        // reset appInfo again for the NEW tabSessionId to clear any stale data
+        // from previous sessions that reused the same key (e.g., anon → known → anon)
+        if (isWidgetTokenChanged) {
+            resetKeys();
+        }
+
         SetSessionStorage('helloConfig', JSON.stringify(event.data.data));
         dispatch(setHelloConfig(event.data.data));
 
@@ -254,6 +262,33 @@ const useHandleHelloEmbeddingScriptEvents = (eventHandler: EmbeddingScriptEventR
         }
     }
 
+    function handleShutdownChatbot() {
+        const widgetId = getLocalStorage('WidgetId');
+        if (widgetId) {
+            const lastUniqueIdKey = `${widgetId}_last_unique_id`;
+            const lastUniqueId = localStorage.getItem(lastUniqueIdKey);
+
+            // Clear the last_unique_id so anon users won't be treated as known
+            localStorage.removeItem(lastUniqueIdKey);
+
+            // Clear per-user client ID mappings
+            if (lastUniqueId) {
+                localStorage.removeItem(`${widgetId}_${lastUniqueId}_k_clientId`);
+            }
+
+            // Clear widget-level client ID mappings
+            localStorage.removeItem(`${widgetId}_k_clientId`);
+            localStorage.removeItem(`${widgetId}_a_clientId`);
+        }
+
+        // Clear session client IDs
+        removeFromLocalStorage('k_clientId');
+        removeFromLocalStorage('a_clientId');
+
+        // Reset appInfo state to clear stale channel data
+        dispatch(setDataInAppInfoReducer({ subThreadId: '', currentChannelId: '', currentChatId: '', currentTeamId: '' }));
+    }
+
     useEffect(() => {
 
         eventHandler.addEventHandler('parent-route-changed', handleParentRouteChanged)
@@ -280,6 +315,8 @@ const useHandleHelloEmbeddingScriptEvents = (eventHandler: EmbeddingScriptEventR
 
         eventHandler.addEventHandler('GET_TICKET_UNREAD_COUNT', handleGetTicketUnreadCount)
 
+        eventHandler.addEventHandler('SHUTDOWN_CHATBOT', handleShutdownChatbot)
+
     }, [])
 
     return null
diff --git a/public/chat-widget-dev.js b/public/chat-widget-dev.js
index a3d54fa4..51a08f44 100644
--- a/public/chat-widget-dev.js
+++ b/public/chat-widget-dev.js
@@ -1431,6 +1431,9 @@
                 sendMessageToChatbot({ type: "GET_TICKET_UNREAD_COUNT", data: { id } });
             });
         },
+        shutdown() {
+            sendMessageToChatbot({ type: "SHUTDOWN_CHATBOT" })
+        }
     };
 
     helloChatbotManager.initializeChatbot();
diff --git a/public/chat-widget-local.js b/public/chat-widget-local.js
index 4f4222bd..fbdb2402 100644
--- a/public/chat-widget-local.js
+++ b/public/chat-widget-local.js
@@ -1419,6 +1419,9 @@
                 sendMessageToChatbot({ type: "GET_TICKET_UNREAD_COUNT", data: { id } });
             });
         },
+        shutdown() {
+            sendMessageToChatbot({ type: "SHUTDOWN_CHATBOT" })
+        }
     };
 
     helloChatbotManager.initializeChatbot();
diff --git a/public/chat-widget.js b/public/chat-widget.js
index fbe9711c..bc74fa68 100644
--- a/public/chat-widget.js
+++ b/public/chat-widget.js
@@ -1426,6 +1426,9 @@
                 sendMessageToChatbot({ type: "GET_TICKET_UNREAD_COUNT", data: { id } });
             });
         },
+        shutdown() {
+            sendMessageToChatbot({ type: "SHUTDOWN_CHATBOT" })
+        }
     };
 
     helloChatbotManager.initializeChatbot();