diff --git a/app/models/notice.rb b/app/models/notice.rb
index 04bcd269dd..99ab9a4023 100644
--- a/app/models/notice.rb
+++ b/app/models/notice.rb
@@ -5,7 +5,9 @@ class Notice < ActiveModelSerializers::Model
 
   # Notices a user has seen are stored as a bitmap in
   # `users.seen_notifications`.
-  NOTICE_BIT_MAP = {}.freeze
+  NOTICE_BIT_MAP = {
+    mastodon_privacy_4_2: 1, # rubocop:disable Naming/VariableNumber
+  }.freeze
 
   def dismiss_for_user!(user)
     user.update!(seen_notices: (user.seen_notices || 0) | NOTICE_BIT_MAP[id])
@@ -29,5 +31,22 @@ class Notice < ActiveModelSerializers::Model
 
       send("#{key}_notice")
     end
+
+    private
+
+    def mastodon_privacy_4_2_notice
+      new(
+        id: :mastodon_privacy_4_2, # rubocop:disable Naming/VariableNumber
+        icon: nil,
+        title: I18n.t('notices.mastodon_privacy_4_2.title'),
+        message: I18n.t('notices.mastodon_privacy_4_2.message'),
+        actions: [
+          Action.new(
+            label: I18n.t('notices.mastodon_privacy_4_2.review'),
+            url: settings_privacy_url
+          ),
+        ]
+      )
+    end
   end
 end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 71b8f27aac..5f759a6ff0 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1441,6 +1441,11 @@ en:
     copy_account_note_text: 'This user moved from %{acct}, here were your previous notes about them:'
   navigation:
     toggle_menu: Toggle menu
+  notices:
+    mastodon_privacy_4_2:
+      message: Mastodon's privacy settings have been moved to a new page, and now include a new setting related to search! Give it a look if you want to allow other people to search for your posts, or if you just want to make sure everything is set up like you want!
+      review: Go to privacy settings
+      title: Search and privacy settings
   notification_mailer:
     admin:
       report:
diff --git a/spec/requests/api/v1/notices_spec.rb b/spec/requests/api/v1/notices_spec.rb
new file mode 100644
index 0000000000..c318801158
--- /dev/null
+++ b/spec/requests/api/v1/notices_spec.rb
@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'notices' do
+  let(:user)    { Fabricate(:user) }
+  let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
+  let(:scopes)  { 'write:accounts' }
+  let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
+
+  describe 'DELETE /api/v1/notices/:id' do
+    subject do
+      delete '/api/v1/notices/mastodon_privacy_4_2', headers: headers
+    end
+
+    it_behaves_like 'forbidden for wrong scope', 'read'
+
+    it 'retruns http success' do
+      subject
+
+      expect(response).to have_http_status(200)
+    end
+
+    it 'marks the notice as seen' do
+      expect { subject }.to change { Notice.first_unseen(user.reload)&.id }.from(:mastodon_privacy_4_2) # rubocop:disable Naming/VariableNumber
+    end
+  end
+
+  describe 'GET /api/v1/notices' do
+    subject do
+      get '/api/v1/notices', headers: headers
+    end
+
+    context 'when the user has seen all notices' do
+      before do
+        Notice.find(:mastodon_privacy_4_2).dismiss_for_user!(user) # rubocop:disable Naming/VariableNumber
+      end
+
+      it 'returns an empty list', :aggregate_failures do
+        subject
+
+        expect(response).to have_http_status(200)
+        expect(body_as_json).to eq []
+      end
+    end
+
+    context 'when the user has unseen notices' do
+      it 'returns exactly one notice', :aggregate_failures do
+        subject
+
+        expect(response).to have_http_status(200)
+        expect(body_as_json.size).to eq 1
+      end
+    end
+
+    context 'without the authorization header' do
+      let(:headers) { {} }
+
+      it 'returns http unprocessable content' do
+        subject
+
+        expect(response).to have_http_status(422)
+      end
+    end
+  end
+end