diff --git a/source/_integrations/signal_messenger.markdown b/source/_integrations/signal_messenger.markdown
index e01b8813988..f579326d142 100644
--- a/source/_integrations/signal_messenger.markdown
+++ b/source/_integrations/signal_messenger.markdown
@@ -90,3 +90,21 @@ action:
       attachments:
         - "/tmp/surveillance_camera.jpg"
 ```
+
+### Text message with an attachment from a URL
+
+To attach files from outside of HomeAssistant, the URLs must be added to the [`allowlist_external_urls`](/docs/configuration/basic/#allowlist_external_urls) list.
+
+Note there is a 50MB size limit for attachments retrieved via URLs. You can also set `verify_ssl` to `false` to ignore SSL errors (default `true`).
+
+```yaml
+...
+action:
+  service: notify.NOTIFIER_NAME
+  data:
+    message: "Person detected on Front Camera!"
+    data:
+      verify_ssl: false
+      urls:
+        - "http://homeassistant.local/api/frigate/notifications/<event-id>/thumbnail.jpg"
+```