diff --git a/app/javascript/mastodon/features/notifications/components/notification.jsx b/app/javascript/mastodon/features/notifications/components/notification.jsx
index cb3f92b71c..1872d9f689 100644
--- a/app/javascript/mastodon/features/notifications/components/notification.jsx
+++ b/app/javascript/mastodon/features/notifications/components/notification.jsx
@@ -30,6 +30,7 @@ const messages = defineMessages({
   status: { id: 'notification.status', defaultMessage: '{name} just posted' },
   statusReference: { id: 'notification.status_reference', defaultMessage: '{name} refered' },
   update: { id: 'notification.update', defaultMessage: '{name} edited a post' },
+  warning: { id: 'notification.warning', defaultMessage: 'You have been warned and "{action}" has been executed. Check your mailbox' },
   adminSignUp: { id: 'notification.admin.sign_up', defaultMessage: '{name} signed up' },
   adminReport: { id: 'notification.admin.report', defaultMessage: '{name} reported {target}' },
 });
@@ -443,6 +444,31 @@ class Notification extends ImmutablePureComponent {
     );
   }
 
+  renderWarning (notification) {
+    const { intl, unread } = this.props;
+    console.dir(notification);
+
+    return (
+      <HotKeys handlers={this.getHandlers()}>
+        <div className={classNames('notification notification-warning focusable', { unread })} tabIndex={0} aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.statusReference, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
+          <div className='notification__message'>
+            <div className='notification__favourite-icon-wrapper'>
+              <Icon id='exclamation-triangle' className='star-icon' fixedWidth />
+            </div>
+
+            <span title={notification.get('created_at')}>
+              <FormattedMessage id='notification.warning' defaultMessage='You have been warned and "{action}" has been executed. Check your mailbox' values={{action: notification.getIn(['account_warning', 'action'])}} />
+            </span>
+          </div>
+
+          <div className='notification__warning-text'>
+            {notification.getIn(['account_warning', 'text'])}
+          </div>
+        </div>
+      </HotKeys>
+    );
+  }
+
   renderAdminSignUp (notification, account, link) {
     const { intl, unread } = this.props;
 
@@ -522,6 +548,8 @@ class Notification extends ImmutablePureComponent {
       return this.renderUpdate(notification, link);
     case 'poll':
       return this.renderPoll(notification, account);
+    case 'warning':
+      return this.renderWarning(notification);
     case 'admin.sign_up':
       return this.renderAdminSignUp(notification, account, link);
     case 'admin.report':
diff --git a/app/javascript/mastodon/locales/ja.json b/app/javascript/mastodon/locales/ja.json
index cca4facea9..40e19d3a7a 100644
--- a/app/javascript/mastodon/locales/ja.json
+++ b/app/javascript/mastodon/locales/ja.json
@@ -439,6 +439,7 @@
   "notification.status": "{name}さんが投稿しました",
   "notification.status_reference": "{name}さんがあなたの投稿を参照しました",
   "notification.update": "{name}さんが投稿を編集しました",
+  "notification.warning": "あなたは警告を出され、「{action}」が実行されました。詳細はメールをご確認ください",
   "notifications.clear": "通知を消去",
   "notifications.clear_confirmation": "本当に通知を消去しますか？",
   "notifications.column_settings.admin.report": "新しい通報:",
diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index 984097ca0f..8ba9cf3c18 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -52,10 +52,11 @@ const notificationToMap = notification => ImmutableMap({
   id: notification.id,
   type: notification.type,
   account: notification.account.id,
-  emoji_reaction: ImmutableMap(notification.emoji_reaction),
   created_at: notification.created_at,
+  emoji_reaction: ImmutableMap(notification.emoji_reaction),
   status: notification.status ? notification.status.id : null,
   report: notification.report ? fromJS(notification.report) : null,
+  account_warning: notification.account_warning ? ImmutableMap(notification.account_warning) : null,
 });
 
 const normalizeNotification = (state, notification, usePendingItems) => {
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 1b6e5626ec..9cfce31355 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1848,6 +1848,11 @@ a.account__display-name {
   }
 }
 
+.notification__warning-text {
+  padding: 16px 16px 16px 48px;
+  color: $darker-text-color;
+}
+
 .notification__display-name {
   color: inherit;
   font-weight: 500;
diff --git a/app/models/admin/account_action.rb b/app/models/admin/account_action.rb
index 2b5560e2eb..c85d733619 100644
--- a/app/models/admin/account_action.rb
+++ b/app/models/admin/account_action.rb
@@ -54,6 +54,7 @@ class Admin::AccountAction
 
     process_email!
     process_queue!
+    notify!
   end
 
   def report
@@ -107,6 +108,10 @@ class Admin::AccountAction
     log_action(:create, @warning) if @warning.text.present? && type == 'none'
   end
 
+  def notify!
+    LocalNotificationWorker.perform_async(target_account.id, @warning.id, 'AccountWarning', 'warning') if @warning && %w(none sensitive silence).include?(type)
+  end
+
   def process_reports!
     # If we're doing "mark as resolved" on a single report,
     # then we want to keep other reports open in case they
diff --git a/app/models/admin/status_batch_action.rb b/app/models/admin/status_batch_action.rb
index b5178c672e..a6c0260758 100644
--- a/app/models/admin/status_batch_action.rb
+++ b/app/models/admin/status_batch_action.rb
@@ -17,6 +17,7 @@ class Admin::StatusBatchAction
 
   def save!
     process_action!
+    notify!
   end
 
   private
@@ -157,6 +158,10 @@ class Admin::StatusBatchAction
     report.save!
   end
 
+  def notify!
+    LocalNotificationWorker.perform_async(target_account.id, @warning.id, 'AccountWarning', 'warning') if warnable? && @warning
+  end
+
   def report
     @report ||= Report.find(report_id) if report_id.present?
   end
diff --git a/app/models/notification.rb b/app/models/notification.rb
index 8f15435c2a..50e45f05b3 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -28,6 +28,7 @@ class Notification < ApplicationRecord
     'EmojiReaction' => :emoji_reaction,
     'StatusReference' => :status_reference,
     'Poll' => :poll,
+    'AccountWarning' => :warning,
   }.freeze
 
   TYPES = %i(
@@ -42,6 +43,7 @@ class Notification < ApplicationRecord
     reaction
     poll
     update
+    warning
     admin.sign_up
     admin.report
   ).freeze
@@ -73,6 +75,7 @@ class Notification < ApplicationRecord
     belongs_to :status_reference, inverse_of: :notification
     belongs_to :poll, inverse_of: false
     belongs_to :report, inverse_of: false
+    belongs_to :account_warning, inverse_of: false
   end
 
   validates :type, inclusion: { in: TYPES }
@@ -159,6 +162,15 @@ class Notification < ApplicationRecord
     end
   end
 
+  def from_account_web
+    case activity_type
+    when 'AccountWarning'
+      account_warning&.target_account
+    else
+      from_account
+    end
+  end
+
   after_initialize :set_from_account
   before_validation :set_from_account
 
@@ -168,7 +180,7 @@ class Notification < ApplicationRecord
     return unless new_record?
 
     case activity_type
-    when 'Status', 'Follow', 'Favourite', 'EmojiReaction', 'EmojiReact', 'FollowRequest', 'Poll', 'Report'
+    when 'Status', 'Follow', 'Favourite', 'EmojiReaction', 'EmojiReact', 'FollowRequest', 'Poll', 'Report', 'AccountWarning'
       self.from_account_id = activity&.account_id
     when 'Mention', 'StatusReference'
       self.from_account_id = activity&.status&.account_id
diff --git a/app/serializers/rest/account_warning_serializer.rb b/app/serializers/rest/account_warning_serializer.rb
new file mode 100644
index 0000000000..3f5940b71c
--- /dev/null
+++ b/app/serializers/rest/account_warning_serializer.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class REST::AccountWarningSerializer < ActiveModel::Serializer
+  attributes :id, :action, :text, :status_ids
+end
diff --git a/app/serializers/rest/notification_serializer.rb b/app/serializers/rest/notification_serializer.rb
index 5a7d6e11b5..71b5d69fc5 100644
--- a/app/serializers/rest/notification_serializer.rb
+++ b/app/serializers/rest/notification_serializer.rb
@@ -3,10 +3,11 @@
 class REST::NotificationSerializer < ActiveModel::Serializer
   attributes :id, :type, :created_at
 
-  belongs_to :from_account, key: :account, serializer: REST::AccountSerializer
+  belongs_to :from_account_web, key: :account, serializer: REST::AccountSerializer
   belongs_to :target_status, key: :status, if: :status_type?, serializer: REST::StatusSerializer
   belongs_to :report, if: :report_type?, serializer: REST::ReportSerializer
   belongs_to :emoji_reaction, if: :emoji_reaction_type?, serializer: REST::NotifyEmojiReactionSerializer
+  belongs_to :account_warning, if: :warning_type?, serializer: REST::AccountWarningSerializer
 
   def id
     object.id.to_s
@@ -20,6 +21,10 @@ class REST::NotificationSerializer < ActiveModel::Serializer
     object.type == :'admin.report'
   end
 
+  def warning_type?
+    object.type == :warning
+  end
+
   def emoji_reaction_type?
     object.type == :emoji_reaction
   end