diff --git a/stages/test_files/Export_HP_Formateurs.xlsx b/stages/test_files/Export_HP_Formateurs.xlsx
index 93a9b6e..d14ea9b 100644
Binary files a/stages/test_files/Export_HP_Formateurs.xlsx and b/stages/test_files/Export_HP_Formateurs.xlsx differ
diff --git a/stages/tests.py b/stages/tests.py
index 30c2cf8..85efa2b 100644
--- a/stages/tests.py
+++ b/stages/tests.py
@@ -326,10 +326,15 @@ class ImportTests(TestCase):
         st1 = Student.objects.create(
             ext_id=164718, first_name='Margot', last_name='Fellmann', birth_date="1994-05-12",
             pcode="2300", city="La Chaux-de-Fonds", corporation=corp)
+        Student.objects.create(
+            ext_id=53476, first_name='Jojo', last_name='Semaine', birth_date="1997-01-03",
+            pcode="2300", city="La Chaux-de-Fonds", corporation=None)
 
         path = os.path.join(os.path.dirname(__file__), 'test_files', 'Export_HP_Formateurs.xlsx')
         self.client.login(username='me', password='mepassword')
         with open(path, 'rb') as fh:
             response = self.client.post(reverse('import-hp-contacts'), {'upload': fh}, follow=True)
+        self.assertContains(response, "Impossible de trouver l'étudiant avec le numéro 10")
+        self.assertContains(response, "NoSIRET est vide à ligne 4. Ligne ignorée")
         st1.refresh_from_db()
         self.assertEqual(st1.instructor.last_name, 'Geiser')
diff --git a/stages/views.py b/stages/views.py
index aef6eee..2857d99 100644
--- a/stages/views.py
+++ b/stages/views.py
@@ -457,7 +457,7 @@ class HPContactsImportView(ImportViewBase):
     def import_data(self, up_file):
         obj_modified = 0
         errors = []
-        for line in up_file:
+        for idx, line in enumerate(up_file, start=2):
             try:
                 student = Student.objects.get(ext_id=int(line['UID_ETU']))
             except Student.DoesNotExist:
@@ -465,6 +465,11 @@ class HPContactsImportView(ImportViewBase):
                     "Impossible de trouver l'étudiant avec le numéro %s" % int(line['UID_ETU'])
                 )
                 continue
+            if not line['NoSIRET']:
+                errors.append(
+                    "NoSIRET est vide à ligne %d. Ligne ignorée" % idx
+                )
+                continue
             try:
                 corp = Corporation.objects.get(ext_id=int(line['NoSIRET']))
             except Corporation.DoesNotExist: