diff --git a/.vscode/settings.json b/.vscode/settings.json
index ca232f1..d0e4f7c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -16,6 +16,7 @@
     "Sider",
     "Syncable",
     "Transpiler",
+    "UNSYNC",
     "Voronoi",
     "Websockets",
     "antd",
diff --git a/src/global/AppServices.tsx b/src/global/AppServices.tsx
index 2645de0..b7518af 100644
--- a/src/global/AppServices.tsx
+++ b/src/global/AppServices.tsx
@@ -9,6 +9,7 @@
 import { SyncWork } from "./ws/SyncWork";
 import { SyncMOTD } from "./ws/SyncMOTD";
 import { AppHotkeys } from "./AppHotkeys";
+import { StorageBroadcast } from "./StorageBroadcast";
 
 export function AppServices(): JSX.Element {
   return <>
@@ -18,5 +19,6 @@
     <ForcedAuth />
     <WebsocketService />
     <AppHotkeys />
+    <StorageBroadcast />
   </>;
 }
diff --git a/src/global/StorageBroadcast.tsx b/src/global/StorageBroadcast.tsx
new file mode 100644
index 0000000..d20fe53
--- /dev/null
+++ b/src/global/StorageBroadcast.tsx
@@ -0,0 +1,65 @@
+// Copyright (c) 2020-2021 Drew Lemmy
+// This file is part of KristWeb 2 under GPL-3.0.
+// Full details: https://github.com/tmpim/KristWeb2/blob/master/LICENSE.txt
+import { store } from "@app";
+import * as actions from "@actions/WalletsActions";
+
+import { getWalletKey, parseWallet, syncWallet } from "@wallets";
+
+import Debug from "debug";
+const debug = Debug("kristweb:storage-broadcast");
+
+export const channel = new BroadcastChannel("kristweb:storage");
+
+export function broadcastAddWallet(id: string): void {
+  debug("broadcasting addWallet event for wallet id %s", id);
+  channel.postMessage(["addWallet", id]);
+}
+
+export function broadcastEditWallet(id: string): void {
+  debug("broadcasting editWallet event for wallet id %s", id);
+  channel.postMessage(["editWallet", id]);
+}
+
+export function broadcastDeleteWallet(id: string): void {
+  debug("broadcasting deleteWallet event for wallet id %s", id);
+  channel.postMessage(["deleteWallet", id]);
+}
+
+/** Component that manages a BroadcastChannel responsible for dispatching wallet
+ * storage events (add, edit, delete) across tabs. */
+export function StorageBroadcast(): JSX.Element | null {
+  // TODO: is it safe to register this here?
+  debug("registering storage broadcast event listener");
+  channel.onmessage = e => {
+    debug("received storage broadcast:", e);
+
+    if (Array.isArray(e.data)) {
+      const [type, ...data] = e.data;
+
+      if (type === "addWallet" || type === "editWallet") {
+        const id: string = data[0];
+        const key = getWalletKey(id);
+
+        // Load the wallet from localStorage (the update should've been
+        // synchronous)
+        const wallet = parseWallet(id, localStorage.getItem(key));
+        debug("%s broadcast %s: %o", type, id, wallet);
+
+        // Dispatch the new/updated wallet to the Redux store
+        if (type === "addWallet") store.dispatch(actions.addWallet(wallet));
+        else store.dispatch(actions.updateWallet(id, wallet));
+
+        syncWallet(wallet, true);
+      } else if (type === "deleteWallet") {
+        const id: string = data[0];
+        debug("addWallet broadcast %s", id);
+        store.dispatch(actions.removeWallet(id));
+      } else {
+        debug("received unknown broadcast msg type %s", type);
+      }
+    }
+  };
+
+  return null;
+}
diff --git a/src/krist/wallets/functions/addWallet.ts b/src/krist/wallets/functions/addWallet.ts
index 592b236..20c50ec 100644
--- a/src/krist/wallets/functions/addWallet.ts
+++ b/src/krist/wallets/functions/addWallet.ts
@@ -9,6 +9,7 @@
 import { aesGcmEncrypt } from "@utils/crypto";
 
 import { Wallet, WalletNew, saveWallet, syncWallet, calculateAddress } from "..";
+import { broadcastAddWallet } from "@global/StorageBroadcast";
 
 /**
  * Adds a new wallet, encrypting its privatekey and password, saving it to
@@ -52,7 +53,10 @@
   };
 
   // Save the wallet to local storage if wanted
-  if (save) saveWallet(newWallet);
+  if (save) {
+    saveWallet(newWallet);
+    broadcastAddWallet(newWallet.id); // Broadcast changes to other tabs
+  }
 
   // Dispatch the changes to the redux store
   store.dispatch(actions.addWallet(newWallet));
diff --git a/src/krist/wallets/functions/editWallet.ts b/src/krist/wallets/functions/editWallet.ts
index b559e23..f7f25c9 100644
--- a/src/krist/wallets/functions/editWallet.ts
+++ b/src/krist/wallets/functions/editWallet.ts
@@ -7,6 +7,7 @@
 import { aesGcmEncrypt } from "@utils/crypto";
 
 import { Wallet, WalletNew, saveWallet, syncWallet, calculateAddress } from "..";
+import { broadcastEditWallet } from "@global/StorageBroadcast";
 
 /**
  * Edits a new wallet, encrypting its privatekey and password, saving it to
@@ -48,6 +49,7 @@
 
   // Save the updated wallet to local storage
   saveWallet(finalWallet);
+  broadcastEditWallet(wallet.id); // Broadcast changes to other tabs
 
   // Dispatch the changes to the redux store
   store.dispatch(actions.updateWallet(wallet.id, finalWallet));
@@ -83,6 +85,7 @@
 
   // Save the updated wallet to local storage
   saveWallet(finalWallet);
+  broadcastEditWallet(wallet.id); // Broadcast changes to other tabs
 
   // Dispatch the changes to the redux store
   store.dispatch(actions.updateWallet(wallet.id, finalWallet));
diff --git a/src/krist/wallets/functions/syncWallets.ts b/src/krist/wallets/functions/syncWallets.ts
index 7e78207..e5a4238 100644
--- a/src/krist/wallets/functions/syncWallets.ts
+++ b/src/krist/wallets/functions/syncWallets.ts
@@ -13,21 +13,35 @@
 
 function syncWalletProperties(
   wallet: Wallet,
-  address: KristAddressWithNames,
+  address: KristAddressWithNames | null,
   syncTime: Date
 ): Wallet {
-  return {
-    ...wallet,
-    ...(address.balance   !== undefined ? { balance: address.balance } : {}),
-    ...(address.names     !== undefined ? { names: address.names } : {}),
-    ...(address.firstseen !== undefined ? { firstSeen: address.firstseen } : {}),
-    lastSynced: syncTime.toISOString()
-  };
+  if (address) {
+    return {
+      ...wallet,
+      ...(address.balance   !== undefined ? { balance: address.balance } : {}),
+      ...(address.names     !== undefined ? { names: address.names } : {}),
+      ...(address.firstseen !== undefined ? { firstSeen: address.firstseen } : {}),
+      lastSynced: syncTime.toISOString()
+    };
+  } else {
+    // Wallet was unsyncable (address not found), clear its properties
+    return {
+      ...wallet,
+      balance: undefined,
+      names: undefined,
+      firstSeen: undefined,
+      lastSynced: syncTime.toISOString()
+    };
+  }
 }
 
 /** Sync the data for a single wallet from the sync node, save it to local
  * storage, and dispatch the change to the Redux store. */
-export async function syncWallet(wallet: Wallet): Promise<void> {
+export async function syncWallet(
+  wallet: Wallet,
+  dontSave?: boolean
+): Promise<void> {
   // Fetch the data from the sync node (e.g. balance)
   const { address } = wallet;
   const lookupResults = await lookupAddresses([address], true);
@@ -35,25 +49,29 @@
   debug("synced individual wallet %s (%s): %o", wallet.id, wallet.address, lookupResults);
 
   const kristAddress = lookupResults[address];
-  if (!kristAddress) return; // Skip unsyncable wallet
-
-  syncWalletUpdate(wallet, kristAddress);
+  syncWalletUpdate(wallet, kristAddress, dontSave);
 }
 
 /** Given an already synced wallet, save it to local storage, and dispatch the
  * change to the Redux store. */
 export function syncWalletUpdate(
   wallet: Wallet,
-  address: KristAddressWithNames
+  address: KristAddressWithNames | null,
+  dontSave?: boolean
 ): void {
   const syncTime = new Date();
   const updatedWallet = syncWalletProperties(wallet, address, syncTime);
 
-  // Save the wallet to local storage (unless dontSave is set)
-  saveWallet(updatedWallet);
+  // Save the wallet to local storage, unless this was an external sync action
+  if (!dontSave) saveWallet(updatedWallet);
 
-  // Dispatch the change to the Redux store
-  store.dispatch(actions.syncWallet(wallet.id, updatedWallet));
+  if (address) {
+    // Wallet synced successfully, dispatch the change to the Redux store
+    store.dispatch(actions.syncWallet(wallet.id, updatedWallet));
+  } else {
+    // Wallet failed to sync, clear its properties
+    store.dispatch(actions.unsyncWallet(wallet.id, syncTime));
+  }
 }
 
 /** Sync the data for all the wallets from the sync node, save it to local
diff --git a/src/krist/wallets/walletStorage.ts b/src/krist/wallets/walletStorage.ts
index 90af2fe..104208b 100644
--- a/src/krist/wallets/walletStorage.ts
+++ b/src/krist/wallets/walletStorage.ts
@@ -7,6 +7,10 @@
 import { TranslatedError } from "@utils/i18n";
 
 import { Wallet, WalletMap } from ".";
+import { broadcastDeleteWallet } from "@global/StorageBroadcast";
+
+import Debug from "debug";
+const debug = Debug("kristweb:wallet-storage");
 
 /** The limit provided by the Krist server for a single address lookup. In the
  * future I may implement batching for these, but for now, this seems like a
@@ -15,8 +19,9 @@
 export const ADDRESS_LIST_LIMIT = 128;
 
 /** Get the local storage key for a given wallet. */
-export function getWalletKey(wallet: Wallet): string {
-  return `wallet2-${wallet.id}`;
+export function getWalletKey(wallet: Wallet | string): string {
+  const id = typeof wallet === "string" ? wallet : wallet.id;
+  return `wallet2-${id}`;
 }
 
 /** Extract a wallet ID from a local storage key. */
@@ -26,7 +31,7 @@
   return id ? [key, id] : undefined;
 }
 
-function loadWallet(id: string, data: string | null) {
+export function parseWallet(id: string, data: string | null): Wallet {
   if (data === null) // localStorage key was missing
     throw new TranslatedError("masterPassword.walletStorageCorrupt");
 
@@ -54,7 +59,7 @@
     .map(extractWalletKey)
     .filter(k => k !== undefined) as [string, string][];
 
-  const wallets = keysToLoad.map(([key, id]) => loadWallet(id, localStorage.getItem(key)));
+  const wallets = keysToLoad.map(([key, id]) => parseWallet(id, localStorage.getItem(key)));
 
   // Convert to map with wallet IDs
   const walletMap: WalletMap = wallets.reduce((obj, w) => ({ ...obj, [w.id]: w }), {});
@@ -67,6 +72,8 @@
   if (wallet.dontSave) return;
 
   const key = getWalletKey(wallet);
+  debug("saving wallet key %s with data %o", key, wallet);
+
   const serialised = JSON.stringify(wallet);
   localStorage.setItem(key, serialised);
 }
@@ -77,5 +84,7 @@
   const key = getWalletKey(wallet);
   localStorage.removeItem(key);
 
+  broadcastDeleteWallet(wallet.id); // Broadcast changes to other tabs
+
   store.dispatch(actions.removeWallet(wallet.id));
 }
diff --git a/src/store/actions/WalletsActions.ts b/src/store/actions/WalletsActions.ts
index f4f006b..3bad1f0 100644
--- a/src/store/actions/WalletsActions.ts
+++ b/src/store/actions/WalletsActions.ts
@@ -31,6 +31,10 @@
 export const syncWallets = createAction(constants.SYNC_WALLETS,
   (wallets): SyncWalletsPayload => ({ wallets }))<SyncWalletsPayload>();
 
+export interface UnsyncWalletPayload { id: string; lastSynced: string }
+export const unsyncWallet = createAction(constants.UNSYNC_WALLET,
+  (id, lastSynced): UnsyncWalletPayload => ({ id, lastSynced }))<UnsyncWalletPayload>();
+
 export interface RecalculateWalletsPayload { wallets: Record<string, string> }
 export const recalculateWallets = createAction(constants.RECALCULATE_WALLETS,
   (wallets): RecalculateWalletsPayload => ({ wallets }))<RecalculateWalletsPayload>();
diff --git a/src/store/constants.ts b/src/store/constants.ts
index cf5a11c..6a7ed4a 100644
--- a/src/store/constants.ts
+++ b/src/store/constants.ts
@@ -15,6 +15,7 @@
 export const UPDATE_WALLET = "UPDATE_WALLET";
 export const SYNC_WALLET = "SYNC_WALLET";
 export const SYNC_WALLETS = "SYNC_WALLETS";
+export const UNSYNC_WALLET = "UNSYNC_WALLET";
 export const RECALCULATE_WALLETS = "RECALCULATE_WALLETS";
 
 // Settings
diff --git a/src/store/reducers/WalletsReducer.ts b/src/store/reducers/WalletsReducer.ts
index 3eef56e..4d9d537 100644
--- a/src/store/reducers/WalletsReducer.ts
+++ b/src/store/reducers/WalletsReducer.ts
@@ -35,7 +35,7 @@
 
 export const WalletsReducer = createReducer({ wallets: {} } as State)
   // Load wallets
-  .handleAction(actions.loadWallets, (state: State, { payload }: ActionType<typeof actions.loadWallets>) => ({
+  .handleAction(actions.loadWallets, (state, { payload }) => ({
     ...state,
     wallets: {
       ...state.wallets,
@@ -43,7 +43,7 @@
     }
   }))
   // Add wallet
-  .handleAction(actions.addWallet, (state: State, { payload }: ActionType<typeof actions.addWallet>) => ({
+  .handleAction(actions.addWallet, (state, { payload }) => ({
     ...state,
     wallets: {
       ...state.wallets,
@@ -51,19 +51,19 @@
     }
   }))
   // Remove wallet
-  .handleAction(actions.removeWallet, (state: State, { payload }: ActionType<typeof actions.removeWallet>) => {
+  .handleAction(actions.removeWallet, (state, { payload }) => {
     // Get the wallets without the one we want to remove
     const { [payload.id]: _, ...wallets } = state.wallets;
     return { ...state, wallets };
   })
   // Update wallet
-  .handleAction(actions.updateWallet, (state: State, { payload }: ActionType<typeof actions.updateWallet>) =>
+  .handleAction(actions.updateWallet, (state, { payload }) =>
     assignNewWalletProperties(state, payload.id, payload.wallet, WALLET_UPDATABLE_KEYS))
   // Sync wallet
-  .handleAction(actions.syncWallet, (state: State, { payload }: ActionType<typeof actions.syncWallet>) =>
+  .handleAction(actions.syncWallet, (state, { payload }) =>
     assignNewWalletProperties(state, payload.id, payload.wallet, WALLET_SYNCABLE_KEYS))
   // Sync wallets
-  .handleAction(actions.syncWallets, (state: State, { payload }: ActionType<typeof actions.syncWallets>) => {
+  .handleAction(actions.syncWallets, (state, { payload }) => {
     const updatedWallets = Object.entries(payload.wallets)
       .map(([id, newData]) => ({ // merge in the new data
         ...(state.wallets[id]), // old data
@@ -78,8 +78,22 @@
 
     return { ...state, wallets: { ...state.wallets, ...updatedWallets }};
   })
+  // Unsync wallet (remove its balance etc. as it no longer exists)
+  .handleAction(actions.unsyncWallet, (state, { payload }) => ({
+    ...state,
+    wallets: {
+      ...state.wallets,
+      [payload.id]: {
+        ...state.wallets[payload.id],
+        balance: undefined,
+        names: undefined,
+        firstSeen: undefined,
+        lastSynced: payload.lastSynced
+      }
+    }
+  }))
   // Recalculate wallets
-  .handleAction(actions.recalculateWallets, (state: State, { payload }: ActionType<typeof actions.recalculateWallets>) => {
+  .handleAction(actions.recalculateWallets, (state, { payload }) => {
     const updatedWallets = Object.entries(payload.wallets)
       .map(([id, newData]) => ({ // merge in the new data
         ...(state.wallets[id]), // old data
diff --git a/tsconfig.extend.json b/tsconfig.extend.json
index 4bd0469..5ac721f 100644
--- a/tsconfig.extend.json
+++ b/tsconfig.extend.json
@@ -18,6 +18,7 @@
       "@wallets": ["./krist/wallets"],
       "@wallets/*": ["./krist/wallets/*"],
       "@krist/*": ["./krist/*"],
+      "@global/*": ["./global/*"],
 
       "@utils": ["./utils"],
       "@utils/*": ["./utils/*"]