diff --git a/src/app/models/enums.ts b/src/app/models/enums.ts
index fe84d50..2c15ca5 100644
--- a/src/app/models/enums.ts
+++ b/src/app/models/enums.ts
@@ -27,7 +27,10 @@ export enum PullRequestActivityAction {
   Rescoped = 'RESCOPED',
   Commented = 'COMMENTED',
   Merged = 'MERGED',
-  Declined = 'DECLINED'
+  Declined = 'DECLINED',
+
+  // virtual activity
+  Removed = 'REMOVED'
 }
 
 
diff --git a/src/app/services/background.service.ts b/src/app/services/background.service.ts
index 15d2e47..e32dc26 100644
--- a/src/app/services/background.service.ts
+++ b/src/app/services/background.service.ts
@@ -4,14 +4,16 @@ import {BitbucketCommentAction, PullRequestActivityAction, PullRequestRole, Pull
 import {ExtensionSettings, PullRequest} from '../models/models';
 import {DataService} from './data.service';
 import {NotificationService} from './notification.service';
+import {catchError} from 'rxjs/operators';
+import {of, throwError} from 'rxjs';
 import Alarm = chrome.alarms.Alarm;
+import {HttpErrorResponse} from '@angular/common/http';
 
 // @ts-ignore
 let chr: any = chrome;
 
 @Injectable()
 export class BackgroundService {
-  timer?: number;
   interval: number;
   public dataProcessed!: EventEmitter<PullRequestRole>;
   private settings!: ExtensionSettings;
@@ -208,7 +210,40 @@ export class BackgroundService {
     before
       .filter(b => !now.some(n => n.id === b.id))
       .forEach(b => {
-        // todo: check missing PR, was it merged / declined ?
+        this.bitbucketService
+          .getPullRequestActivities(b.fromRef.repository.project.key, b.fromRef.repository.slug, b.id)
+          .pipe(catchError(error => {
+            if (error instanceof HttpErrorResponse && error.status === 404) {
+              this.notificationService.sendNotification(
+                {
+                  action: PullRequestActivityAction.Removed,
+                  pullRequest: b
+                });
+
+              return of({values: []});
+            } else {
+              return throwError(error);
+            }
+          }))
+          .subscribe(data => {
+            let activities = data.values.filter(a =>
+              (a.action === PullRequestActivityAction.Merged || a.action === PullRequestActivityAction.Declined)
+              // make sure activity wasn't generated by myself
+              && a.user.id !== this.settings?.bitbucket?.userId
+              // check if action occurred after last running time
+              && a.createdDate >= this.lastRunningTime);
+
+            if (activities.length) {
+              // get recent activity
+              let act = activities.sort((one, two) => (one.createdDate > two.createdDate ? -1 : 1))[0];
+              this.notificationService.sendNotification(
+                {
+                  action: act.action,
+                  pullRequest: b,
+                  activity: act
+                });
+            }
+          });
       });
   }
 
diff --git a/src/app/services/notification.service.ts b/src/app/services/notification.service.ts
index 26c685c..40b7e3d 100644
--- a/src/app/services/notification.service.ts
+++ b/src/app/services/notification.service.ts
@@ -46,6 +46,15 @@ export class NotificationService {
               case PullRequestActivityAction.Approved:
                 body = 'pull request approved';
                 break;
+              case PullRequestActivityAction.Merged:
+                body = 'pull request merged';
+                break;
+              case PullRequestActivityAction.Declined:
+                body = 'pull request declined';
+                break;
+              case PullRequestActivityAction.Removed:
+                body = 'pull request removed';
+                break;
             }
 
             new Notification(options.pullRequest.title, {
@@ -123,10 +132,13 @@ export class NotificationService {
         title = `:merged: @${options.activity?.user.name} merged pull request`;
         break;
       case PullRequestActivityAction.Declined:
-        title = `:_: @${options.activity?.user.name} declined pull request`;
+        title = `:heavy_multiplication_x: @${options.activity?.user.name} declined pull request`;
+        break;
+      case PullRequestActivityAction.Removed:
+        title = `:x: pull request was removed`;
         break;
       default:
-        title = `something happened: ${options.action}`;
+        title = `something happened with pull request: ${options.action}`;
         break;
     }