diff --git a/lib/actions/aux-user-actions.js b/lib/actions/aux-user-actions.js
--- a/lib/actions/aux-user-actions.js
+++ b/lib/actions/aux-user-actions.js
@@ -2,4 +2,6 @@
 
 const setFarcasterFriendsFIDActionType = 'SET_FARCASTER_FRIENDS_FID';
 
-export { setFarcasterFriendsFIDActionType };
+const clearAuxUserFIDsActionType = 'CLEAR_AUX_USER_FIDS';
+
+export { setFarcasterFriendsFIDActionType, clearAuxUserFIDsActionType };
diff --git a/lib/reducers/aux-user-reducer.js b/lib/reducers/aux-user-reducer.js
--- a/lib/reducers/aux-user-reducer.js
+++ b/lib/reducers/aux-user-reducer.js
@@ -1,6 +1,9 @@
 // @flow
 
-import { setFarcasterFriendsFIDActionType } from '../actions/aux-user-actions.js';
+import {
+  setFarcasterFriendsFIDActionType,
+  clearAuxUserFIDsActionType,
+} from '../actions/aux-user-actions.js';
 import { setClientDBStoreActionType } from '../actions/client-db-store-actions.js';
 import {
   auxUserStoreOpsHandlers,
@@ -33,6 +36,27 @@
         },
       });
     }
+    return {
+      auxUserStore: processStoreOps(state, replaceOperations),
+      auxUserStoreOperations: replaceOperations,
+    };
+  } else if (action.type === clearAuxUserFIDsActionType) {
+    const replaceOperations: ReplaceAuxUserInfoOperation[] = [];
+    for (const userID in state.auxUserInfos) {
+      if (state.auxUserInfos[userID].fid !== null) {
+        replaceOperations.push({
+          type: 'replace_aux_user_info',
+          payload: {
+            id: userID,
+            auxUserInfo: {
+              ...state.auxUserInfos[userID],
+              fid: null,
+            },
+          },
+        });
+      }
+    }
+
     return {
       auxUserStore: processStoreOps(state, replaceOperations),
       auxUserStoreOperations: replaceOperations,
diff --git a/lib/types/redux-types.js b/lib/types/redux-types.js
--- a/lib/types/redux-types.js
+++ b/lib/types/redux-types.js
@@ -1388,6 +1388,10 @@
         +type: 'SET_FARCASTER_FRIENDS_FID',
         +payload: SetFarcasterFriendsFIDPayload,
       }
+    | {
+        +type: 'CLEAR_AUX_USER_FIDS',
+        +payload?: void,
+      }
     | {
         +type: 'OPS_PROCESSING_FINISHED_ACTION_TYPE',
         +payload?: void,