diff --git a/lib/tunnelbroker/use-peer-to-peer-message-handler.js b/lib/tunnelbroker/use-peer-to-peer-message-handler.js
--- a/lib/tunnelbroker/use-peer-to-peer-message-handler.js
+++ b/lib/tunnelbroker/use-peer-to-peer-message-handler.js
@@ -55,6 +55,7 @@
 import { getContentSigningKey } from '../utils/crypto-utils.js';
 import { getMessageForException } from '../utils/errors.js';
 import {
+  useClearFarcasterThreads,
   useSetLocalCurrentUserSupportsDCs,
   useSetLocalFID,
 } from '../utils/farcaster-utils.js';
@@ -108,6 +109,7 @@
 
   const setLocalFID = useSetLocalFID();
   const setLocalDCsSupport = useSetLocalCurrentUserSupportsDCs();
+  const clearFarcasterThreads = useClearFarcasterThreads();
 
   const fullBackupSupport = useFullBackupSupportEnabled();
 
@@ -238,6 +240,9 @@
       ) {
         setLocalFID(userActionMessage.farcasterID);
         setLocalDCsSupport(userActionMessage.hasDCsToken);
+        if (!userActionMessage.hasDCsToken) {
+          clearFarcasterThreads();
+        }
       } else {
         console.warn(
           'Unsupported P2P user action message:',
@@ -258,6 +263,7 @@
       setLocalFID,
       userDataRestore,
       fullBackupSupport,
+      clearFarcasterThreads,
     ],
   );
 }
diff --git a/lib/utils/farcaster-utils.js b/lib/utils/farcaster-utils.js
--- a/lib/utils/farcaster-utils.js
+++ b/lib/utils/farcaster-utils.js
@@ -17,6 +17,7 @@
 } from '../permissions/thread-permissions.js';
 import { getOwnPeerDevices } from '../selectors/user-selectors.js';
 import { generatePendingThreadColor } from '../shared/color-utils.js';
+import { processFarcasterOpsActionType } from '../shared/farcaster/farcaster-actions.js';
 import type { FarcasterConversation } from '../shared/farcaster/farcaster-conversation-types.js';
 import type { FarcasterMessage } from '../shared/farcaster/farcaster-messages-types.js';
 import { farcasterThreadIDFromConversationID } from '../shared/id-utils.js';
@@ -42,6 +43,7 @@
 import { farcasterThreadTypes } from '../types/thread-types-enum.js';
 import type { FarcasterThreadType } from '../types/thread-types-enum.js';
 import type { FarcasterConnectionUpdated } from '../types/tunnelbroker/user-actions-peer-to-peer-message-types.js';
+import { updateTypes } from '../types/update-types-enum.js';
 
 const DISABLE_CONNECT_FARCASTER_ALERT = false;
 const NO_FID_METADATA = 'NONE';
@@ -155,6 +157,30 @@
   );
 }
 
+function useClearFarcasterThreads(): () => void {
+  const threads = useSelector(state => state.threadStore.threadInfos);
+  const dispatch = useDispatch();
+  return React.useCallback(() => {
+    const farcasterThreadIDs = Object.values(threads)
+      .filter(thread => thread.farcaster)
+      .map(thread => thread.id);
+    const time = Date.now();
+    const updates = farcasterThreadIDs.map(threadID => ({
+      type: updateTypes.DELETE_THREAD,
+      id: uuid.v4(),
+      time,
+      threadID,
+    }));
+    dispatch({
+      type: processFarcasterOpsActionType,
+      payload: {
+        rawMessageInfos: [],
+        updateInfos: updates,
+      },
+    });
+  }, [dispatch, threads]);
+}
+
 function useUnlinkFID(): () => Promise<void> {
   const identityClientContext = React.useContext(IdentityClientContext);
   invariant(identityClientContext, 'identityClientContext should be set');
@@ -166,17 +192,20 @@
   const setLocalDCsSupport = useSetLocalCurrentUserSupportsDCs();
   const broadcastConnectionStatus =
     useBroadcastUpdateFarcasterConnectionStatus();
+  const clearFarcasterThreads = useClearFarcasterThreads();
 
   return React.useCallback(async () => {
     await unlinkFarcasterAccount();
     setLocalFID(null);
     setLocalDCsSupport(null);
     await broadcastConnectionStatus(null, null);
+    clearFarcasterThreads();
   }, [
     unlinkFarcasterAccount,
     setLocalFID,
     setLocalDCsSupport,
     broadcastConnectionStatus,
+    clearFarcasterThreads,
   ]);
 }
 
@@ -474,4 +503,5 @@
   createFarcasterDCsAuthMessage,
   createFarcasterRawThreadInfo,
   convertFarcasterMessageToCommMessages,
+  useClearFarcasterThreads,
 };