diff --git a/defaults/main.yml b/defaults/main.yml
index 94c7b76e..1cac8585 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -460,7 +460,7 @@ keystone_sp: {}
 #       metadata_file: 'metadata-keystone-idp.xml'
 #       metadata_reload: 1800
 #       federated_identities:
-#         - domain: default
+#         - domain: Default
 #           project: fedproject
 #           group: fedgroup
 #           role: member
@@ -497,7 +497,7 @@ keystone_sp: {}
 #       metadata_file: 'metadata-testshib-idp.xml'
 #       metadata_reload: 1800
 #       federated_identities:
-#         - domain: default
+#         - domain: Default
 #           project: fedproject
 #           group: fedgroup
 #           role: member
@@ -523,7 +523,7 @@ keystone_sp: {}
 #       metadata_file: 'metadata-adfs-idp.xml'
 #       metadata_reload: 1800
 #       federated_identities:
-#         - domain: default
+#         - domain: Default
 #           project: fedproject
 #           group: fedgroup
 #           role: member
@@ -562,7 +562,7 @@ keystone_sp: {}
 #       entity_ids:
 #         - 'https://identity-provider/openid-endpoint/'
 #       federated_identities:
-#         - domain: default
+#         - domain: Default
 #           project: fedproject
 #           group: fedgroup
 #           role: member
diff --git a/releasenotes/notes/federated_domain_names-4e169b8b9a947940.yaml b/releasenotes/notes/federated_domain_names-4e169b8b9a947940.yaml
new file mode 100644
index 00000000..d323661d
--- /dev/null
+++ b/releasenotes/notes/federated_domain_names-4e169b8b9a947940.yaml
@@ -0,0 +1,13 @@
+---
+issues:
+  - |
+    Due to the underlying `bug <https://bugs.launchpad.net/ansible-collections-openstack/+bug/2065680>`_
+    in Ansible collections for OpenStack, ``Default`` domain name can be
+    renamed to ``default`` under certain conditions.
+    One known example is having ``domain: default`` defenition under
+    ``keystone_sp -> trusted_idp_list -> federated_identities`` structure.
+upgrade:
+  - |
+    Please, make sure that in case of federation usage you define domain
+    name instead of it's ID (ie. ``Default`` instead of ``default``)
+    under ``keystone_sp -> trusted_idp_list -> federated_identities``