diff --git a/releasenotes/notes/deprecate_ert-449b16638c008457.yaml b/releasenotes/notes/deprecate_ert-449b16638c008457.yaml
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+++ b/releasenotes/notes/deprecate_ert-449b16638c008457.yaml
@@ -0,0 +1,9 @@
+---
+upgrade:
+  - |
+    The Extensible Resource Tracker is deprecated and will be removed in the
+    14.0.0 release.
+    If you use this functionality and have custom resources that are managed
+    by the Extensible Resource Tracker, please contact the Nova development
+    team by posting to the openstack-dev mailing list.
+    There is no future planned support for the tracking of custom resources.