diff --git a/app/models/notification/event_payload.rb b/app/models/notification/event_payload.rb
index b296f7252..9fee43032 100644
--- a/app/models/notification/event_payload.rb
+++ b/app/models/notification/event_payload.rb
@@ -43,7 +43,7 @@ class Notification::EventPayload < Notification::DefaultPayload
     when "card_auto_postponed"
       "Moved to Not Now due to inactivity"
     else
-      event.creator.name
+      "Updated by #{event.creator.name}"
     end
   end
 
diff --git a/test/models/notification/push_target/web_test.rb b/test/models/notification/push_target/web_test.rb
index 26ad80cc8..4dd95ac40 100644
--- a/test/models/notification/push_target/web_test.rb
+++ b/test/models/notification/push_target/web_test.rb
@@ -161,6 +161,18 @@ class Notification::PushTarget::WebTest < ActiveSupport::TestCase
     Notification::PushTarget::Web.new(@notification).process
   end
 
+  test "payload for unhandled action uses updated fallback message" do
+    event = events(:logo_published)
+    event.update!(action: "card_unassigned")
+    @notification.update!(source: event)
+
+    @web_push_pool.expects(:queue).once.with do |payload, _|
+      payload[:body] == "Updated by #{event.creator.name}"
+    end
+
+    Notification::PushTarget::Web.new(@notification).process
+  end
+
   test "payload for mention includes mentioner name" do
     @web_push_pool.expects(:queue).once.with do |payload, _|
       payload[:title].include?("mentioned you")