diff --git a/participation/forms.py b/participation/forms.py
index 7f5e290..5691971 100644
--- a/participation/forms.py
+++ b/participation/forms.py
@@ -271,28 +271,38 @@ class UploadNotesForm(forms.Form):
 
     def process(self, csvfile: Iterable[str], cleaned_data: dict):
         parsed_notes = {}
+        valid_lengths = [1 + 6 * 3, 1 + 7 * 4, 1 + 6 * 5]  # Per pool sizes
+        pool_size = 0
+        line_length = 0
         for line in csvfile:
             line = [s for s in line if s]
-            if len(line) < 19:
-                continue
-            name = line[0]
-            if name in ["moyenne", "coefficient", "sous-total"]:
-                continue
-            notes = line[1:19]
-            if not all(s.isnumeric() for s in notes):
-                continue
-            notes = list(map(int, notes))
-            if max(notes) < 3 or min(notes) < 0:
+            if line and line[0] == 'Problème':
+                pool_size = len(line) - 1
+                if pool_size < 3 or pool_size > 5:
+                    self.add_error('file', _("Can't determine the pool size. Are you sure your file is correct?"))
+                    return
+                line_length = valid_lengths[pool_size - 3]
                 continue
 
-            max_notes = 3 * [20, 16, 9, 10, 9, 10]
+            if pool_size == 0 or len(line) < line_length:
+                continue
+
+            name = line[0]
+            if name in ["Rôle", "Juré", "moyenne", "coefficient", "sous-total", "Equipe"]:
+                continue
+            notes = line[1:line_length]
+            if not all(s.isnumeric() or s[0] == '-' and s[1:].isnumeric() for s in notes):
+                continue
+            notes = list(map(int, notes))
+
+            max_notes = pool_size * ([20, 16, 9, 10, 9, 10] + ([4] if pool_size == 4 else []))
             for n, max_n in zip(notes, max_notes):
                 if n > max_n:
                     self.add_error('file',
                                    _("The following note is higher of the maximum expected value:")
                                    + str(n) + " > " + str(max_n))
 
-            first_name, last_name = tuple(name.split(' ', 1))
+            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)
diff --git a/participation/views.py b/participation/views.py
index 1fda3b2..72cc994 100644
--- a/participation/views.py
+++ b/participation/views.py
@@ -809,9 +809,11 @@ class PoolUploadNotesView(VolunteerMixin, FormView, DetailView):
             if vr not in pool.juries.all():
                 form.add_error('file', _("The following user is not registered as a jury:") + " " + str(vr))
 
+            # There is an observer note for 4-teams pools
+            notes_count = 7 if pool.passages.count() == 4 else 6
             for i, passage in enumerate(pool.passages.all()):
                 note = Note.objects.get_or_create(jury=vr, passage=passage)[0]
-                passage_notes = notes[6 * i:6 * (i + 1)]
+                passage_notes = notes[notes_count * i:notes_count * (i + 1)]
                 note.set_all(*passage_notes)
                 note.save()