diff --git a/src/user/user.service.spec.ts b/src/user/user.service.spec.ts
index 08552d90..803c065a 100644
--- a/src/user/user.service.spec.ts
+++ b/src/user/user.service.spec.ts
@@ -296,6 +296,19 @@ describe('UserService', () => {
       );
     });
 
+    it('when supplied a firebase user dto with an email that already exists, it should return an error', async () => {
+      const repoSaveSpy = jest.spyOn(repo, 'save');
+      const authServiceUpdateEmailSpy = jest
+        .spyOn(mockAuthService, 'updateFirebaseUserEmail')
+        .mockImplementationOnce(async () => {
+          throw new Error('Email already exists');
+        });
+
+      await expect(service.updateUser(updateUserDto, mockUserEntity.id)).rejects.toThrow(
+        'Email already exists',
+      );
+    });
+
     it('should not fail update on crisp api call errors', async () => {
       const mocked = jest.mocked(updateCrispProfile);
       mocked.mockRejectedValue(new Error('Crisp API call failed'));
@@ -305,7 +318,6 @@ describe('UserService', () => {
       expect(mocked).toHaveBeenCalled();
       expect(user.name).toBe(updateUserDto.name);
       expect(user.email).toBe(updateUserDto.email);
-
       mocked.mockReset();
     });
 
diff --git a/src/user/user.service.ts b/src/user/user.service.ts
index a47a1b4b..2ea7fa40 100644
--- a/src/user/user.service.ts
+++ b/src/user/user.service.ts
@@ -10,7 +10,7 @@ import { SubscriptionUserService } from 'src/subscription-user/subscription-user
 import { TherapySessionService } from 'src/therapy-session/therapy-session.service';
 import { SIGNUP_TYPE } from 'src/utils/constants';
 import { FIREBASE_ERRORS } from 'src/utils/errors';
-import { FIREBASE_EVENTS } from 'src/utils/logs';
+import { FIREBASE_EVENTS, USER_SERVICE_EVENTS } from 'src/utils/logs';
 import {
   createServiceUserProfiles,
   updateServiceUserProfilesUser,
@@ -218,6 +218,11 @@ export class UserService {
       ...updateUserDto,
     };
     const updatedUser = await this.userRepository.save(newUserData);
+    this.logger.log({
+      event: USER_SERVICE_EVENTS.USER_UPDATED,
+      userId: user.id,
+      fields: Object.keys(updateUserDto),
+    });
 
     const isCrispBaseUpdateRequired =
       user.signUpLanguage !== updateUserDto.signUpLanguage && user.name !== updateUserDto.name;
diff --git a/src/utils/logs.ts b/src/utils/logs.ts
index 1a3418dc..4b0ee61e 100644
--- a/src/utils/logs.ts
+++ b/src/utils/logs.ts
@@ -2,3 +2,7 @@ export enum FIREBASE_EVENTS {
   UPDATE_FIREBASE_USER_EMAIL = 'UPDATE_FIREBASE_USER_EMAIL',
   UPDATE_FIREBASE_EMAIL_ALREADY_UPDATED = 'UPDATE_FIREBASE_EMAIL_ALREADY_UPDATED',
 }
+
+export enum USER_SERVICE_EVENTS {
+  USER_UPDATED = 'USER_UPDATED',
+}