diff --git a/app/delivery/send_to_providers.py b/app/delivery/send_to_providers.py
index c50858ccb..3f92e54d1 100644
--- a/app/delivery/send_to_providers.py
+++ b/app/delivery/send_to_providers.py
@@ -28,7 +28,8 @@ from app.models import (
     EMAIL_TYPE,
     NOTIFICATION_TECHNICAL_FAILURE,
     NOTIFICATION_SENT,
-    NOTIFICATION_SENDING
+    NOTIFICATION_SENDING,
+    NOTIFICATION_STATUS_TYPES_COMPLETED
 )
 
 
@@ -125,7 +126,8 @@ def send_email_to_provider(notification):
 def update_notification_to_sending(notification, provider):
     notification.sent_at = datetime.utcnow()
     notification.sent_by = provider.get_name()
-    notification.status = NOTIFICATION_SENT if notification.international else NOTIFICATION_SENDING
+    if notification.status not in NOTIFICATION_STATUS_TYPES_COMPLETED:
+        notification.status = NOTIFICATION_SENT if notification.international else NOTIFICATION_SENDING
     dao_update_notification(notification)
 
 
diff --git a/tests/app/delivery/test_send_to_providers.py b/tests/app/delivery/test_send_to_providers.py
index dc19ff4ee..367f86059 100644
--- a/tests/app/delivery/test_send_to_providers.py
+++ b/tests/app/delivery/test_send_to_providers.py
@@ -9,7 +9,7 @@ from notifications_utils.recipients import validate_and_format_phone_number
 from requests import HTTPError
 
 import app
-from app import mmg_client, firetext_client
+from app import clients, mmg_client, firetext_client
 from app.dao import notifications_dao
 from app.dao.provider_details_dao import get_provider_details_by_identifier
 from app.delivery import send_to_providers
@@ -525,6 +525,20 @@ def test_should_not_update_notification_if_research_mode_on_exception(
     assert update_mock.called
 
 
+@pytest.mark.parametrize("starting_status, expected_status", [
+    ("delivered", "delivered"),
+    ("created", "sending"),
+    ("technical-failure", "technical-failure"),
+])
+def test_update_notification_to_sending_does_not_update_status_from_a_final_status(
+    sample_service, notify_db_session, starting_status, expected_status
+):
+    template = create_template(sample_service)
+    notification = create_notification(template=template, status=starting_status)
+    send_to_providers.update_notification_to_sending(notification, clients.get_client_by_name_and_type("mmg", "sms"))
+    assert notification.status == expected_status
+
+
 def __update_notification(notification_to_update, research_mode, expected_status):
     if research_mode or notification_to_update.key_type == KEY_TYPE_TEST:
         notification_to_update.status = expected_status