diff --git a/ref-test/app/models/user.py b/ref-test/app/models/user.py
index cd945c2..c2a5d81 100644
--- a/ref-test/app/models/user.py
+++ b/ref-test/app/models/user.py
@@ -194,7 +194,8 @@ class User(UserMixin, db.Model):
                 if entry.get_email() == email and not entry == self: return False, f'The email address {email} is already in use.'
             self.set_email(email)
         db.session.commit()
-        write('system.log', f'Information for user {self.get_username()} has been updated by {current_user.get_username()}.')
+        _current_user = current_user.get_username() if current_user.is_authenticated else 'anonymous'
+        write('system.log', f'Information for user {self.get_username()} has been updated by {_current_user}.')
         if notify:
             message = Message(
                 subject='RefTest | Account Update',
@@ -202,7 +203,7 @@ class User(UserMixin, db.Model):
                 bcc=[old_email,current_user.get_email()],
                 body=f"""
                 Hello {self.get_username()},\n\n
-                Your administrator account for the SKA RefTest App has been updated by {current_user.get_username()}.\n\n
+                Your administrator account for the SKA RefTest App has been updated by {_current_user}.\n\n
                 Your new account details are as follows:\n\n
                 Email: {email}\n
                 Password: {password if password else '<same as old>'}\n\n
@@ -213,7 +214,7 @@ class User(UserMixin, db.Model):
                 """,
                 html=f"""
                 <p>Hello {self.get_username()},</p>
-                <p>Your administrator account for the SKA RefTest App has been updated by {current_user.get_username()}.</p>
+                <p>Your administrator account for the SKA RefTest App has been updated by {_current_user}.</p>
                 <p>Your new account details are as follows:</p>
                 <p>Email: {email} <br/> Password: <strong>{password if password else '&lt;same as old&gt;'}</strong></p>
                 <p>You can update your email address and password by logging in to the admin console using the following URL:</p>