diff --git a/nova/policies/flavors.py b/nova/policies/flavors.py
index d9d544df1091..11fd4b7a1df7 100644
--- a/nova/policies/flavors.py
+++ b/nova/policies/flavors.py
@@ -26,7 +26,8 @@ flavors_policies = [
     # as such should be removed.
     policy.RuleDefault(
         name=BASE_POLICY_NAME,
-        check_str=base.RULE_ADMIN_OR_OWNER),
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Deprecated in Pike and will be removed in next release'),
 ]
 
 
diff --git a/nova/policies/server_groups.py b/nova/policies/server_groups.py
index afa774a8c2e3..e0d74bec71ae 100644
--- a/nova/policies/server_groups.py
+++ b/nova/policies/server_groups.py
@@ -27,7 +27,8 @@ server_groups_policies = [
     # TODO(Kevin_Zheng): remove this rule as this not used by any API
     policy.RuleDefault(
         name=BASE_POLICY_NAME,
-        check_str=base.RULE_ADMIN_OR_OWNER),
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Deprecated in Pike and will be removed in next release'),
     base.create_rule_default(
         POLICY_ROOT % 'create',
         BASE_POLICY_RULE,
diff --git a/releasenotes/notes/deprecate_unused_policy-d3bf8589aee63eb6.yaml b/releasenotes/notes/deprecate_unused_policy-d3bf8589aee63eb6.yaml
new file mode 100644
index 000000000000..f5e429813cbd
--- /dev/null
+++ b/releasenotes/notes/deprecate_unused_policy-d3bf8589aee63eb6.yaml
@@ -0,0 +1,9 @@
+---
+deprecations:
+  - |
+    Some unused policies have been deprecated. These are:
+
+    * ``os_compute_api:os-server-groups``
+    * ``os_compute_api:flavors``
+
+    Please note you should remove these from your policy file(s).