diff --git a/participation/forms.py b/participation/forms.py
index 0a3f0f9..775422c 100644
--- a/participation/forms.py
+++ b/participation/forms.py
@@ -261,12 +261,11 @@ class UploadNotesForm(forms.Form):
             with file:
                 try:
                     csvfile = csv.reader(StringIO(file.read().decode()))
+                    self.process(csvfile, cleaned_data)
                 except UnicodeDecodeError:
                     self.add_error('file', _("This file contains non-UTF-8 content. "
                                              "Please send your sheet as a CSV file."))
 
-            self.process(csvfile, cleaned_data)
-
         return cleaned_data
 
     def process(self, csvfile: Iterable[str], cleaned_data: dict):