diff --git a/app/celery/scheduled_tasks.py b/app/celery/scheduled_tasks.py
index 3fd731994..6c27f8fb5 100644
--- a/app/celery/scheduled_tasks.py
+++ b/app/celery/scheduled_tasks.py
@@ -61,7 +61,7 @@ from app.celery.tasks import (
 )
 from app.config import QueueNames, TaskNames
 from app.utils import convert_utc_to_bst
-from app.v2.errors import JobIncompleteError, NoAckFileReceived
+from app.v2.errors import JobIncompleteError
 from app.dao.service_callback_api_dao import get_service_callback_api_for_service
 from app.celery.service_callback_tasks import send_delivery_status_to_service
 import pytz
@@ -533,17 +533,15 @@ def letter_raise_alert_if_no_ack_file_for_zip():
     # strip empty element before comparison
     ack_content_set.discard('')
     zip_file_set.discard('')
-    if current_app.config['NOTIFY_ENVIRONMENT'] in ['production', 'test']:
-        if len(zip_file_set - ack_content_set) > 0:
+
+    if len(zip_file_set - ack_content_set) > 0:
+        if current_app.config['NOTIFY_ENVIRONMENT'] in ['production', 'test']:
             deskpro_client.create_ticket(
                 subject="Letter acknowledge error",
                 message=deskpro_message,
                 ticket_type='alert'
             )
-
-            raise NoAckFileReceived(message=str(zip_file_set - ack_content_set))
-    else:
-        current_app.logger.info(deskpro_message)
+        current_app.logger.error(deskpro_message)
 
     if len(ack_content_set - zip_file_set) > 0:
         current_app.logger.info(
diff --git a/app/v2/errors.py b/app/v2/errors.py
index 9ce9f942f..dd76a03bc 100644
--- a/app/v2/errors.py
+++ b/app/v2/errors.py
@@ -27,23 +27,6 @@ class JobIncompleteError(Exception):
         }
 
 
-class NoAckFileReceived(Exception):
-    def __init__(self, message):
-        self.message = message
-        self.status_code = 500
-
-    def to_dict_v2(self):
-        return {
-            'status_code': self.status_code,
-            "errors": [
-                {
-                    "error": 'NoAckFileReceived',
-                    "message": str(self.message)
-                }
-            ]
-        }
-
-
 class TooManyRequestsError(InvalidRequest):
     status_code = 429
     message_template = 'Exceeded send limits ({}) for today'