diff --git a/orchestrator/activities/formatters.py b/orchestrator/activities/formatters.py
index 17a091b..1ebcc6b 100644
--- a/orchestrator/activities/formatters.py
+++ b/orchestrator/activities/formatters.py
@@ -558,15 +558,20 @@ class Formatters(BaseActivity):
             }
             receiver_groups[group_name]['notifications'] = []
 
+            already_added_keys = []
+
             ignore_list = receiver_group.get('ignore', [])
 
             for notification in notification_package:
                 alert_type = "reports"
                 notification_id = notification['notification_id']
 
+                key = f"{notification['trigger']}:{notification_id}"
+
                 # Check if this group must be notified
-                if alert_type in receiver_group['contents'] and notification_id not in ignore_list:
+                if alert_type in receiver_group['contents'] and notification_id not in ignore_list and key not in already_added_keys:
                     receiver_groups[group_name]["notifications"].append(
                         notification)
+                    already_added_keys.append(key)
 
         return receiver_groups
diff --git a/orchestrator/activities/slot_manager.py b/orchestrator/activities/slot_manager.py
index 16cf26f..076a1a8 100644
--- a/orchestrator/activities/slot_manager.py
+++ b/orchestrator/activities/slot_manager.py
@@ -289,6 +289,8 @@ class SlotManager(Redis):
             }
             receiver_groups[group_name]['notifications'] = []
 
+            already_added_keys = []
+
             ignore_list = receiver_group.get('ignore', [])
 
             for notification in notification_package:
@@ -311,9 +313,10 @@ class SlotManager(Redis):
                         alert_type = "persistent_alerts"
 
                 # Check if this group must be notified
-                if alert_type in receiver_group['contents'] and notification_id not in ignore_list:
+                if alert_type in receiver_group['contents'] and notification_id not in ignore_list and key not in already_added_keys:
                     receiver_groups[group_name]["notifications"].append(
                         notification)
+                    already_added_keys.append(key)
 
         return receiver_groups