diff --git a/Sources/EQNNotificationService/EQNNotificationService-Bridging-Header.h b/Sources/EQNNotificationService/EQNNotificationService-Bridging-Header.h
index 1b2cb5d..d0986b4 100644
--- a/Sources/EQNNotificationService/EQNNotificationService-Bridging-Header.h
+++ b/Sources/EQNNotificationService/EQNNotificationService-Bridging-Header.h
@@ -2,3 +2,4 @@
 //  Use this file to import your target's public headers that you would like to expose to Swift.
 //
 
+#import "NotificationService.h"
diff --git a/Sources/EQNNotificationService/NotificationService+Extension.swift b/Sources/EQNNotificationService/NotificationService+Extension.swift
new file mode 100644
index 0000000..7aab983
--- /dev/null
+++ b/Sources/EQNNotificationService/NotificationService+Extension.swift
@@ -0,0 +1,42 @@
+//
+//  NotificationService+Extension.swift
+//  EQNNotificationService
+//
+//  Created by Andrea Busi on 28/05/22.
+//  Copyright © 2022 Earthquake Network. All rights reserved.
+//
+
+import Foundation
+import UserNotifications
+
+
+extension NotificationService {
+    
+    @objc(removeNotificationsForType:completion:)
+    func removeNotifications(
+        for type: String?,
+        completion: @escaping() -> Void
+    ) {
+        guard let type = type else {
+            completion()
+            return
+        }
+        
+        let notificationCenter = UNUserNotificationCenter.current()
+        
+        notificationCenter.getDeliveredNotifications { notifications in
+            let sameTypeNotifications = notifications.filter { notification in
+                let payload = notification.request.content.userInfo
+                if let notificationType = payload["type"] as? String {
+                    return notificationType == type
+                }
+                return false
+            }
+            
+            let identifiers = sameTypeNotifications.map { $0.request.identifier }
+            notificationCenter.removeDeliveredNotifications(withIdentifiers: identifiers)
+            
+            completion()
+        }
+    }
+}
diff --git a/Sources/EQNNotificationService/NotificationService.m b/Sources/EQNNotificationService/NotificationService.m
index a8f021f..ba402e7 100644
--- a/Sources/EQNNotificationService/NotificationService.m
+++ b/Sources/EQNNotificationService/NotificationService.m
@@ -9,6 +9,8 @@
 #import "NotificationService.h"
 #import "EQNAllertaSismica.h"
 #import "Costanti.h"
+#import "EQNNotificationService-Swift.h"
+
 
 @interface NotificationService ()
 
@@ -158,7 +160,10 @@ static NSString * const EQNSoundNotificationEQN = @"alert_sound.wav";
         }
     }
     
-    [self contentComplete];
+    // remove same type posted notification
+    [self removeNotificationsForType:notificationType completion:^{
+        [self contentComplete];
+    }];;
 }
 
 - (void)serviceExtensionTimeWillExpire
diff --git a/Sources/Earthquake Network.xcodeproj/project.pbxproj b/Sources/Earthquake Network.xcodeproj/project.pbxproj
index 37ed6a9..2fe6499 100644
--- a/Sources/Earthquake Network.xcodeproj/project.pbxproj	
+++ b/Sources/Earthquake Network.xcodeproj/project.pbxproj	
@@ -11,6 +11,7 @@
 		651901B925F5358700CAFF20 /* EQNMapAnnotationSeismic.swift in Sources */ = {isa = PBXBuildFile; fileRef = 651901B825F5358700CAFF20 /* EQNMapAnnotationSeismic.swift */; };
 		6525A82625E13FD4008FE0D0 /* SeismicNetworkAdvertiseTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6525A82525E13FD4008FE0D0 /* SeismicNetworkAdvertiseTableViewCell.swift */; };
 		652C37BD26092B3C0068EC3B /* FiltersViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 652C37BC26092B3C0068EC3B /* FiltersViewModel.swift */; };
+		6531185928425B89006CBC29 /* NotificationService+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6531185828425B89006CBC29 /* NotificationService+Extension.swift */; };
 		65355FFF25F38D3300BB57D2 /* SegnalazioniMapViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 65355FFE25F38D3300BB57D2 /* SegnalazioniMapViewController.swift */; };
 		6535600425F398CD00BB57D2 /* Costanti+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6535600325F398CD00BB57D2 /* Costanti+Extensions.swift */; };
 		653604E9262348FA00B2B651 /* EQNBaseMapFilter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 653604E8262348FA00B2B651 /* EQNBaseMapFilter.swift */; };
@@ -288,6 +289,7 @@
 		651901B825F5358700CAFF20 /* EQNMapAnnotationSeismic.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EQNMapAnnotationSeismic.swift; sourceTree = "<group>"; };
 		6525A82525E13FD4008FE0D0 /* SeismicNetworkAdvertiseTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SeismicNetworkAdvertiseTableViewCell.swift; sourceTree = "<group>"; };
 		652C37BC26092B3C0068EC3B /* FiltersViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FiltersViewModel.swift; sourceTree = "<group>"; };
+		6531185828425B89006CBC29 /* NotificationService+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NotificationService+Extension.swift"; sourceTree = "<group>"; };
 		65355FFE25F38D3300BB57D2 /* SegnalazioniMapViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SegnalazioniMapViewController.swift; sourceTree = "<group>"; };
 		6535600325F398CD00BB57D2 /* Costanti+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Costanti+Extensions.swift"; sourceTree = "<group>"; };
 		653604E8262348FA00B2B651 /* EQNBaseMapFilter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EQNBaseMapFilter.swift; sourceTree = "<group>"; };
@@ -660,6 +662,7 @@
 				8C483CB521FDACD100259FD2 /* EQNNotificationService-Bridging-Header.h */,
 				8C4B0B7C21CACE3F00AED489 /* NotificationService.h */,
 				8C4B0B7D21CACE3F00AED489 /* NotificationService.m */,
+				6531185828425B89006CBC29 /* NotificationService+Extension.swift */,
 				DC30BC862534DBB30041B23B /* Icons */,
 				8C4B0B7F21CACE3F00AED489 /* Info.plist */,
 			);
@@ -1526,6 +1529,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				DCDAB31925188BB3001AE40D /* EQNAllertaSismica.m in Sources */,
+				6531185928425B89006CBC29 /* NotificationService+Extension.swift in Sources */,
 				8C4B0B7E21CACE3F00AED489 /* NotificationService.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;