diff --git a/participation/forms.py b/participation/forms.py
index e7848c7..a9fed47 100644
--- a/participation/forms.py
+++ b/participation/forms.py
@@ -13,6 +13,8 @@ from django import forms
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.core.validators import FileExtensionValidator
+from django.db.models import CharField, Value
+from django.db.models.functions import Concat
 from django.utils.translation import gettext_lazy as _
 from pypdf import PdfReader
 
@@ -301,10 +303,10 @@ class UploadNotesForm(forms.Form):
                                    _("The following note is higher of the maximum expected value:")
                                    + str(n) + " > " + str(max_n))
 
-            first_name, last_name = tuple(name.replace('’', '\'').split(' ', 1))
-
-            jury = User.objects.filter(first_name=first_name, last_name=last_name,
-                                       registration__volunteerregistration__isnull=False)
+            # Search by "{first_name} {last_name}"
+            jury = User.objects.annotate(full_name=Concat('first_name', Value(' '), 'last_name',
+                                                          output_field=CharField())) \
+                .filter(full_name=name.replace('’', '\''), registration__volunteerregistration__isnull=False)
             if jury.count() != 1:
                 self.add_error('file', _("The following user was not found:") + " " + name)
                 continue