diff --git a/.changeset/lovely-planes-shop.md b/.changeset/lovely-planes-shop.md
new file mode 100644
index 0000000000..3ee5a57e75
--- /dev/null
+++ b/.changeset/lovely-planes-shop.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-notifications-backend': patch
+---
+
+fix: consider broadcast union with user
diff --git a/plugins/notifications-backend/src/database/DatabaseNotificationsStore.test.ts b/plugins/notifications-backend/src/database/DatabaseNotificationsStore.test.ts
index c6df60c56e..d4e678c8f1 100644
--- a/plugins/notifications-backend/src/database/DatabaseNotificationsStore.test.ts
+++ b/plugins/notifications-backend/src/database/DatabaseNotificationsStore.test.ts
@@ -42,6 +42,7 @@ async function createStore(databaseId: TestDatabaseId) {
 const idOnly = (notification: Notification) => notification.id;
 
 const user = 'user:default/john.doe';
+const otherUser = 'user:default/jane.doe';
 
 const id0 = '08e0871e-e60a-4f68-8110-5ae3513f992e';
 const id1 = '01e0871e-e60a-4f68-8110-5ae3513f992e';
@@ -140,7 +141,7 @@ const testNotification7: Notification = {
 };
 const otherUserNotification: Notification = {
   id: id0,
-  user: 'user:default/jane.doe',
+  user: otherUser,
   created: new Date(now),
   origin: 'plugin-test',
   payload: {
@@ -246,6 +247,34 @@ describe.each(databases.eachSupportedId())(
         expect(notifications.map(idOnly)).toEqual([id2, id3, id1]);
       });
 
+      it('should return correct broadcast notifications for different users', async () => {
+        await storage.saveNotification(testNotification1);
+        await storage.saveBroadcast(testNotification2);
+        await storage.saveNotification(testNotification3);
+        await storage.saveNotification(otherUserNotification);
+
+        await storage.markRead({ ids: [id1, id2], user });
+
+        const notifications = await storage.getNotifications({
+          user,
+        });
+        expect(notifications.map(idOnly)).toEqual([id2, id3, id1]);
+        expect(notifications[1].user).toBe(user);
+
+        let otherUserNotifications = await storage.getNotifications({
+          user: otherUser,
+        });
+        expect(otherUserNotifications.map(idOnly)).toEqual([id0, id2]);
+        expect(otherUserNotifications[1].user).toBeNull();
+
+        await storage.markRead({ ids: [id0, id2], user: otherUser });
+        otherUserNotifications = await storage.getNotifications({
+          user: otherUser,
+        });
+        expect(otherUserNotifications.map(idOnly)).toEqual([id0, id2]);
+        expect(otherUserNotifications[1].user).toBe(otherUser);
+      });
+
       it('should allow searching for notifications', async () => {
         await storage.saveNotification(testNotification2);
         await storage.saveBroadcast(testNotification1);
@@ -571,6 +600,23 @@ describe.each(databases.eachSupportedId())(
         const notification = await storage.getNotification({ id: id2 });
         expect(notification?.id).toEqual(id2);
       });
+
+      it('should consider user for broadcast by id', async () => {
+        await storage.saveBroadcast(testNotification1);
+
+        let notification = await storage.getNotification({ id: id1, user });
+        expect(notification?.id).toEqual(id1);
+        expect(notification?.user).toBeNull();
+        await storage.markRead({ ids: [id1], user });
+        notification = await storage.getNotification({ id: id1, user });
+        expect(notification?.user).toBe(user);
+
+        const otherNotification = await storage.getNotification({
+          id: id1,
+          user: otherUser,
+        });
+        expect(otherNotification?.user).toBeNull();
+      });
     });
 
     describe('markRead', () => {
diff --git a/plugins/notifications-backend/src/database/DatabaseNotificationsStore.ts b/plugins/notifications-backend/src/database/DatabaseNotificationsStore.ts
index 3d027128ec..b23f5254f4 100644
--- a/plugins/notifications-backend/src/database/DatabaseNotificationsStore.ts
+++ b/plugins/notifications-backend/src/database/DatabaseNotificationsStore.ts
@@ -138,14 +138,14 @@ export class DatabaseNotificationsStore implements NotificationsStore {
     };
   };
 
-  private getBroadcastUnion = () => {
+  private getBroadcastUnion = (user?: string | null) => {
     return this.db('broadcast')
-      .leftJoin(
-        'broadcast_user_status',
-        'id',
-        '=',
-        'broadcast_user_status.broadcast_id',
-      )
+      .leftJoin('broadcast_user_status', function clause() {
+        const join = this.on('id', '=', 'broadcast_user_status.broadcast_id');
+        if (user !== null && user !== undefined) {
+          join.andOnVal('user', '=', user);
+        }
+      })
       .select(NOTIFICATION_COLUMNS);
   };
 
@@ -156,7 +156,7 @@ export class DatabaseNotificationsStore implements NotificationsStore {
 
     const subQuery = this.db('notification')
       .select(NOTIFICATION_COLUMNS)
-      .unionAll([this.getBroadcastUnion()])
+      .unionAll([this.getBroadcastUnion(user)])
       .as('notifications');
 
     const query = this.db.from(subQuery).where(q => {
@@ -345,16 +345,19 @@ export class DatabaseNotificationsStore implements NotificationsStore {
       broadcastQuery.update({ ...updateColumns, read: undefined }),
     ]);
 
-    return await this.getNotification({ id });
+    return await this.getNotification({ id, user: notification.user });
   }
 
-  async getNotification(options: { id: string }): Promise<Notification | null> {
+  async getNotification(options: {
+    id: string;
+    user?: string | null;
+  }): Promise<Notification | null> {
     const rows = await this.db
       .select('*')
       .from(
         this.db('notification')
           .select(NOTIFICATION_COLUMNS)
-          .unionAll([this.getBroadcastUnion()])
+          .unionAll([this.getBroadcastUnion(options.user)])
           .as('notifications'),
       )
       .where('id', options.id)