diff --git a/examples/google-secure-signals-integration/react_client_side/src/SecureSignalsApp.tsx b/examples/google-secure-signals-integration/react_client_side/src/SecureSignalsApp.tsx
index b6f922a1..59340697 100644
--- a/examples/google-secure-signals-integration/react_client_side/src/SecureSignalsApp.tsx
+++ b/examples/google-secure-signals-integration/react_client_side/src/SecureSignalsApp.tsx
@@ -1,5 +1,4 @@
 import React, { useState, useEffect, useRef, useCallback } from 'react';
-
 import './styles/app.css';
 import './styles/ads.css';
 
diff --git a/src/callbackManager.ts b/src/callbackManager.ts
index 954f962b..970dd23b 100644
--- a/src/callbackManager.ts
+++ b/src/callbackManager.ts
@@ -7,6 +7,7 @@ export enum EventType {
   IdentityUpdated = 'IdentityUpdated',
   SdkLoaded = 'SdkLoaded',
   OptoutReceived = 'OptoutReceived',
+  NoIdentityAvailable = 'NoIdentityAvailable',
 }
 
 export type CallbackPayload = SdkLoadedPayload | PayloadWithIdentity;
diff --git a/src/integrationTests/options.test.ts b/src/integrationTests/options.test.ts
index cae62615..faa2f370 100644
--- a/src/integrationTests/options.test.ts
+++ b/src/integrationTests/options.test.ts
@@ -1,7 +1,7 @@
 import { afterEach, beforeEach, describe, expect, jest, test } from '@jest/globals';
 
 import * as mocks from '../mocks';
-import { SdkOptions, sdkWindow, UID2 } from '../uid2Sdk';
+import { EventType, SdkOptions, sdkWindow, UID2 } from '../uid2Sdk';
 import { loadConfig, removeConfig } from '../configManager';
 import { ProductDetails } from '../product';
 
@@ -555,4 +555,69 @@ describe('Store config UID2', () => {
       expect(storageConfig).toBeNull();
     });
   });
+
+  describe('when no identity is sent in init', () => {
+    let handler: ReturnType<typeof jest.fn>;
+    beforeEach(() => {
+      handler = jest.fn();
+      uid2.callbacks.push(handler);
+    });
+    test('runs NoIdentityAvailable event', () => {
+      uid2.init({});
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, { identity: null });
+      uid2.init({});
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, { identity: null });
+      let expiredIdentity = makeIdentity({
+        identity_expires: Date.now() - 100000,
+        refresh_expires: Date.now() - 100000,
+      });
+      uid2.init({
+        identity: expiredIdentity,
+      });
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, {
+        identity: expiredIdentity,
+      });
+    });
+    test('runs NoIdentityAvailable event', () => {
+      let expiredIdentity = makeIdentity({
+        identity_expires: Date.now() - 100000,
+        refresh_expires: Date.now() - 100000,
+      });
+      uid2.init({
+        identity: expiredIdentity,
+      });
+      uid2.init({});
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, {
+        identity: expiredIdentity,
+      });
+    });
+    test('runs NoIdentityAvailable event', () => {
+      let expiredIdentity1 = makeIdentity({
+        identity_expires: Date.now() - 5000,
+        refresh_expires: Date.now() - 5000,
+      });
+      let expiredIdentity2 = makeIdentity({
+        identity_expires: Date.now() - 100000,
+        refresh_expires: Date.now() - 100000,
+      });
+      uid2.init({
+        identity: expiredIdentity1,
+      });
+      uid2.init({ identity: expiredIdentity2 });
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, {
+        identity: expiredIdentity2,
+      });
+    });
+    test('runs NoIdentityAvailable event', () => {
+      uid2.init({});
+      let expiredIdentity = makeIdentity({
+        identity_expires: Date.now() - 5000,
+        refresh_expires: Date.now() - 5000,
+      });
+      uid2.setIdentity(expiredIdentity);
+      expect(handler).toHaveBeenLastCalledWith(EventType.NoIdentityAvailable, {
+        identity: null,
+      });
+    });
+  });
 });
diff --git a/src/sdkBase.ts b/src/sdkBase.ts
index 2638e959..3db0450d 100644
--- a/src/sdkBase.ts
+++ b/src/sdkBase.ts
@@ -158,6 +158,8 @@ export abstract class SdkBase {
         this.triggerRefreshOrSetTimer(validatedIdentity);
       }
       this._callbackManager.runCallbacks(EventType.IdentityUpdated, {});
+    } else {
+      this._callbackManager.runCallbacks(EventType.NoIdentityAvailable, {});
     }
   }
 
@@ -185,7 +187,14 @@ export abstract class SdkBase {
   }
 
   public isIdentityAvailable() {
-    return this.isIdentityValid() || this._apiClient?.hasActiveRequests();
+    const identityAvailable = this.isIdentityValid() || this._apiClient?.hasActiveRequests();
+    if (!identityAvailable) {
+      if (this._callbackManager) {
+        this._callbackManager.runCallbacks(EventType.NoIdentityAvailable, {});
+      }
+      return false;
+    }
+    return true;
   }
 
   public hasOptedOut() {
@@ -230,10 +239,14 @@ export abstract class SdkBase {
         this._initCallbackManager?.addInitCallback(opts.callback);
       }
 
-      const useNewIdentity =
-        opts.identity &&
-        (!previousOpts.identity ||
-          opts.identity.identity_expires > previousOpts.identity.identity_expires);
+      let useNewIdentity;
+      if (!opts.identity) useNewIdentity = true;
+      else {
+        useNewIdentity =
+          !previousOpts.identity ||
+          opts.identity.identity_expires > previousOpts.identity.identity_expires;
+      }
+
       if (useNewIdentity || opts.callback) {
         let identity = useNewIdentity ? opts.identity : previousOpts.identity ?? null;
         if (identity) {
@@ -277,6 +290,7 @@ export abstract class SdkBase {
 
     this.setInitComplete(true);
     this._callbackManager?.runCallbacks(EventType.InitCompleted, {});
+    this.isIdentityAvailable();
     if (this.hasOptedOut()) this._callbackManager.runCallbacks(EventType.OptoutReceived, {});
   }