diff --git a/app/models/concerns/domain/registry_lockable.rb b/app/models/concerns/domain/registry_lockable.rb
index 4a759296d..ccb0f305e 100644
--- a/app/models/concerns/domain/registry_lockable.rb
+++ b/app/models/concerns/domain/registry_lockable.rb
@@ -12,6 +12,7 @@ module Concerns
           statuses << DomainStatus::SERVER_DELETE_PROHIBITED
           statuses << DomainStatus::SERVER_TRANSFER_PROHIBITED
           self.locked_by_registrant_at = Time.zone.now
+          alert_registrar_lock_changes!
 
           save!
         end
@@ -42,10 +43,21 @@ module Concerns
           statuses.delete(DomainStatus::SERVER_DELETE_PROHIBITED)
           statuses.delete(DomainStatus::SERVER_TRANSFER_PROHIBITED)
           self.locked_by_registrant_at = nil
+          alert_registrar_lock_changes!
 
           save!
         end
       end
+
+      def alert_registrar_lock_changes!
+        translation = locked_by_registrant? ? 'locked' : 'unlocked'
+        registrar.notifications.create!(
+          text: I18n.t("notifications.texts.registrar_#{translation}",
+                       domain_name: name),
+          attached_obj_id: name,
+          attached_obj_type: self.class.name
+        )
+      end
     end
   end
 end
diff --git a/config/locales/notifications.en.yml b/config/locales/notifications.en.yml
index 1dff4a97c..d67fb5a5b 100644
--- a/config/locales/notifications.en.yml
+++ b/config/locales/notifications.en.yml
@@ -6,3 +6,5 @@ en:
         It was associated with registrant %{old_registrant_code}
         and contacts %{old_contacts_codes}.
       contact_update: Contact %{contact} has been updated by registrant
+      registrar_locked: Domain %{domain_name} has been locked by registrant
+      registrar_unlocked: Domain %{domain_name} has been unlocked by registrant
diff --git a/test/jobs/domain_update_confirm_job_test.rb b/test/jobs/domain_update_confirm_job_test.rb
index 51c42aa4f..dc6e14bf9 100644
--- a/test/jobs/domain_update_confirm_job_test.rb
+++ b/test/jobs/domain_update_confirm_job_test.rb
@@ -18,11 +18,11 @@ class DomainUpdateConfirmJobTest < ActiveSupport::TestCase
     super
   end
 
-  def test_registrant_locked_domain 
+  def test_registrant_locked_domain
     refute @domain.locked_by_registrant?
     @domain.apply_registry_lock
     assert @domain.locked_by_registrant?
-    assert_equal(@domain.registrar.notifications.last.text, 'Domain has been locked by registrant')
+    assert_equal(@domain.registrar.notifications.last.text, "Domain #{@domain.name} has been unlocked by registrant")
   end
 
   def test_registrant_unlocked_domain
@@ -31,7 +31,7 @@ class DomainUpdateConfirmJobTest < ActiveSupport::TestCase
     assert @domain.locked_by_registrant?
     @domain.remove_registry_lock
     refute @domain.locked_by_registrant?
-    assert_equal(@domain.registrar.notifications.last.text, 'Domain has been unlocked by registrant')
+    assert_equal(@domain.registrar.notifications.last.text, "Domain #{@domain.name} has been unlocked by registrant")
   end
 
   def test_rejected_registrant_verification_notifies_registrar