diff --git a/rero_ils/config.py b/rero_ils/config.py
index e0669e75ed..2fd8ebf0d2 100644
--- a/rero_ils/config.py
+++ b/rero_ils/config.py
@@ -214,8 +214,9 @@ def _(x):
     },
     'notification-creation': {
         'task':
-            'rero-ils.modules.tasks.create_over_and_due_soon_notifications',
-        'schedule': crontab(hour=4, minute=00)
+            'rero_ils.modules.notifications.tasks.create_over_and_due_soon_notifications',
+        'schedule': crontab(minute="*/5")
+        # TODO: in production set this up once a day
     },
     # 'mef-harvester': {
     #     'task': 'rero_ils.modules.apiharvester.tasks.harvest_records',
@@ -662,19 +663,13 @@ def _(x):
         search_type=None,
         record_serializers={
             'application/json': (
-                'rero_ils.modules.serializers' ':json_v1_response'
-            ),
-            'application/can-delete+json': (
-                'rero_ils.modules.serializers' ':can_delete_json_v1_response'
+                'rero_ils.modules.serializers:json_v1_response'
             )
         },
         search_serializers={
             'application/json': (
-                'invenio_records_rest.serializers' ':json_v1_search'
-            ),
-            'application/can-delete+json': (
-                'rero_ils.modules.serializers' ':can_delete_json_v1_search'
-            ),
+                'rero_ils.modules.serializers:json_v1_search'
+            )
         },
         record_loaders={
             'application/json': lambda: Notification(request.get_json()),
diff --git a/rero_ils/modules/circ_policies/jsonschemas/circ_policies/circ_policy-v0.0.1.json b/rero_ils/modules/circ_policies/jsonschemas/circ_policies/circ_policy-v0.0.1.json
index 6cbed29bc1..c0d6bf261f 100644
--- a/rero_ils/modules/circ_policies/jsonschemas/circ_policies/circ_policy-v0.0.1.json
+++ b/rero_ils/modules/circ_policies/jsonschemas/circ_policies/circ_policy-v0.0.1.json
@@ -70,7 +70,7 @@
       "description": "Number of days before due date for sending the availability notification.",
       "type": "integer",
       "default": 5,
-      "minimum": 1
+      "minimum": 0
     },
     "number_of_days_after_due_date": {
       "title": "Number of days after due data.",
diff --git a/rero_ils/modules/notifications/tasks.py b/rero_ils/modules/notifications/tasks.py
index 85b7bd4ed6..abf7b3b5d4 100644
--- a/rero_ils/modules/notifications/tasks.py
+++ b/rero_ils/modules/notifications/tasks.py
@@ -35,9 +35,18 @@
 def create_over_and_due_soon_notifications():
     """Creates due_soon and overdue notifications."""
     over_due_loans = get_overdue_loans()
+    no_over_due_loans = 0
     for loan in over_due_loans:
         loan.create_notification(notification_type='overdue')
+        no_over_due_loans += 1
 
     due_soon_loans = get_due_soon_loans()
+    no_due_soon_loans = 0
     for loan in due_soon_loans:
         loan.create_notification(notification_type='due_soon')
+        no_due_soon_loans += 1
+
+    return 'created {no_over_due_loans} overdue loans, '\
+        '{no_due_soon_loans} due soon loans'.format(
+            no_over_due_loans=no_over_due_loans,
+            no_due_soon_loans=no_due_soon_loans)
diff --git a/setup.py b/setup.py
index aa81f3af20..6d5ccfeb12 100644
--- a/setup.py
+++ b/setup.py
@@ -268,6 +268,7 @@ def run(self):
         'invenio_celery.tasks': [
             'rero_ils_oaiharvest = rero_ils.modules.ebooks.tasks',
             'rero_ils_mefharvest = rero_ils.modules.apiharvester.tasks',
+            'rero_ils_notifications = rero_ils.modules.notifications.tasks',
         ],
         'invenio_records.jsonresolver': [
             'organisations = rero_ils.modules.organisations.jsonresolver',
diff --git a/tests/api/test_serializers.py b/tests/api/test_serializers.py
index d4ba11b10a..2716d2c364 100644
--- a/tests/api/test_serializers.py
+++ b/tests/api/test_serializers.py
@@ -130,7 +130,7 @@ def test_items_serializers(
     patron_martigny_no_email,
     librarian_martigny_no_email,
     librarian_sion_no_email,
-    loan_pending
+    loan_pending_martigny
 ):
     """Test record retrieval."""
     login_user(client, librarian_martigny_no_email)
diff --git a/tests/ui/notifications/test_notifications_api.py b/tests/ui/notifications/test_notifications_api.py
index 517bdd8689..1370a5c7ef 100644
--- a/tests/ui/notifications/test_notifications_api.py
+++ b/tests/ui/notifications/test_notifications_api.py
@@ -36,9 +36,23 @@
     notification_id_fetcher as fetcher
 
 
-def test_notification_create_and_es_mapping(
-        dummy_notification, loan_validated_martigny, mailbox):
-    """Test notification creation."""
+def test_notification_organisation_pid(
+        org_martigny, notification_availability_martigny):
+    """Test organisation pid has been added during the indexing."""
+    search = NotificationsSearch()
+    pid = notification_availability_martigny.get('pid')
+    notification = next(search.filter('term', pid=pid).scan())
+    assert notification.organisation.pid == org_martigny.pid
+
+    # test notification can_delete
+    assert notification_availability_martigny.get_links_to_me() == {}
+    assert notification_availability_martigny.can_delete
+
+
+def test_notification_es_mapping(
+        dummy_notification, loan_validated_martigny):
+    """Test notification elasticsearch mapping."""
+
     search = NotificationsSearch()
     mapping = get_mapping(search.Meta.index)
     assert mapping
@@ -51,6 +65,22 @@ def test_notification_create_and_es_mapping(
     loan_ref = '{loan_url}{pid}'.format(**notif_data)
     notif['loan'] = {"$ref": loan_ref}
 
+    Notification.create(notif, dbcommit=True, delete_pid=True, reindex=True)
+
+    assert mapping == get_mapping(search.Meta.index)
+
+
+def test_notification_create(
+        es_clear, dummy_notification, loan_validated_martigny, mailbox):
+    """Test notification creation."""
+    notif = deepcopy(dummy_notification)
+    notif_data = {
+        'loan_url': 'https://ils.rero.ch/api/loans/',
+        'pid': loan_validated_martigny.get('loan_pid')
+    }
+    loan_ref = '{loan_url}{pid}'.format(**notif_data)
+    notif['loan'] = {"$ref": loan_ref}
+
     notification = Notification.create(
         notif, dbcommit=True, delete_pid=True, reindex=True)
     assert notification == notif
@@ -60,24 +90,9 @@ def test_notification_create_and_es_mapping(
     notification = Notification.get_record_by_pid(pid)
     assert notification == notif
 
-    assert mapping == get_mapping(search.Meta.index)
-
     fetched_pid = fetcher(notification.id, notification)
     assert fetched_pid.pid_value == pid
     assert fetched_pid.pid_type == 'notif'
 
     notification.dispatch()
     assert len(mailbox) == 1
-
-
-def test_notification_organisation_pid(
-        org_martigny, notification_availability_martigny):
-    """Test organisation pid has been added during the indexing."""
-    search = NotificationsSearch()
-    pid = notification_availability_martigny.get('pid')
-    notification = next(search.filter('term', pid=pid).scan())
-    assert notification.organisation.pid == org_martigny.pid
-
-    # test notification can_delete
-    assert notification_availability_martigny.get_links_to_me() == {}
-    assert notification_availability_martigny.can_delete
diff --git a/ui/src/app/records/custom-editor/circulation-settings/circulation-policy/circulation-policy.component.html b/ui/src/app/records/custom-editor/circulation-settings/circulation-policy/circulation-policy.component.html
index 5c75809bc7..9c24a13357 100644
--- a/ui/src/app/records/custom-editor/circulation-settings/circulation-policy/circulation-policy.component.html
+++ b/ui/src/app/records/custom-editor/circulation-settings/circulation-policy/circulation-policy.component.html
@@ -111,7 +111,7 @@ <h1 translate>Circulation Policy</h1>
           Days before due date is required.
         </div>
         <div *ngIf="number_of_days_before_due_date.errors.min" translate>
-          Days before due date must be greater than 0.
+          Days before due date must be greater or equal to 0.
         </div>
       </div>
     </div>