diff --git a/changelogs/fragments/2955-rax_mon_notification_plan-added-elements-to-list-params.yaml b/changelogs/fragments/2955-rax_mon_notification_plan-added-elements-to-list-params.yaml
new file mode 100644
index 0000000000..9ff6f01f7d
--- /dev/null
+++ b/changelogs/fragments/2955-rax_mon_notification_plan-added-elements-to-list-params.yaml
@@ -0,0 +1,2 @@
+minor_changes:
+  - rax_mon_notification_plan - fixed validation checks by specifying type ``str`` as the ``elements`` of parameters ``ok_state``, ``warning_state`` and ``critical_state`` (https://github.com/ansible-collections/community.general/pull/2955).
diff --git a/plugins/modules/cloud/rackspace/rax_mon_notification_plan.py b/plugins/modules/cloud/rackspace/rax_mon_notification_plan.py
index a4b8920dc7..d5294cd509 100644
--- a/plugins/modules/cloud/rackspace/rax_mon_notification_plan.py
+++ b/plugins/modules/cloud/rackspace/rax_mon_notification_plan.py
@@ -32,16 +32,19 @@ options:
     required: true
   critical_state:
     type: list
+    elements: str
     description:
     - Notification list to use when the alarm state is CRITICAL. Must be an
       array of valid rax_mon_notification ids.
   warning_state:
     type: list
+    elements: str
     description:
     - Notification list to use when the alarm state is WARNING. Must be an array
       of valid rax_mon_notification ids.
   ok_state:
     type: list
+    elements: str
     description:
     - Notification list to use when the alarm state is OK. Must be an array of
       valid rax_mon_notification ids.
@@ -150,9 +153,9 @@ def main():
         dict(
             state=dict(default='present', choices=['present', 'absent']),
             label=dict(required=True),
-            critical_state=dict(type='list'),
-            warning_state=dict(type='list'),
-            ok_state=dict(type='list')
+            critical_state=dict(type='list', elements='str'),
+            warning_state=dict(type='list', elements='str'),
+            ok_state=dict(type='list', elements='str'),
         )
     )
 
diff --git a/tests/sanity/ignore-2.10.txt b/tests/sanity/ignore-2.10.txt
index f313df3620..d01c3762dc 100644
--- a/tests/sanity/ignore-2.10.txt
+++ b/tests/sanity/ignore-2.10.txt
@@ -5,7 +5,6 @@ plugins/modules/cloud/misc/rhevm.py validate-modules:parameter-state-invalid-cho
 plugins/modules/cloud/rackspace/rax.py use-argspec-type-path # fix needed
 plugins/modules/cloud/rackspace/rax_files.py validate-modules:parameter-state-invalid-choice
 plugins/modules/cloud/rackspace/rax_files_objects.py use-argspec-type-path
-plugins/modules/cloud/rackspace/rax_mon_notification_plan.py validate-modules:parameter-list-no-elements
 plugins/modules/cloud/rackspace/rax_scaling_group.py use-argspec-type-path  # fix needed, expanduser() applied to dict values
 plugins/modules/cloud/scaleway/scaleway_organization_info.py validate-modules:return-syntax-error
 plugins/modules/cloud/smartos/vmadm.py validate-modules:parameter-type-not-in-doc
diff --git a/tests/sanity/ignore-2.11.txt b/tests/sanity/ignore-2.11.txt
index 6858d92104..2106c993d3 100644
--- a/tests/sanity/ignore-2.11.txt
+++ b/tests/sanity/ignore-2.11.txt
@@ -4,7 +4,6 @@ plugins/modules/cloud/misc/rhevm.py validate-modules:parameter-state-invalid-cho
 plugins/modules/cloud/rackspace/rax.py use-argspec-type-path # fix needed
 plugins/modules/cloud/rackspace/rax_files.py validate-modules:parameter-state-invalid-choice
 plugins/modules/cloud/rackspace/rax_files_objects.py use-argspec-type-path
-plugins/modules/cloud/rackspace/rax_mon_notification_plan.py validate-modules:parameter-list-no-elements
 plugins/modules/cloud/rackspace/rax_scaling_group.py use-argspec-type-path  # fix needed, expanduser() applied to dict values
 plugins/modules/cloud/scaleway/scaleway_organization_info.py validate-modules:return-syntax-error
 plugins/modules/cloud/smartos/vmadm.py validate-modules:parameter-type-not-in-doc
diff --git a/tests/sanity/ignore-2.12.txt b/tests/sanity/ignore-2.12.txt
index 9b0e047d57..a30ff2e4ed 100644
--- a/tests/sanity/ignore-2.12.txt
+++ b/tests/sanity/ignore-2.12.txt
@@ -4,7 +4,6 @@ plugins/modules/cloud/misc/rhevm.py validate-modules:parameter-state-invalid-cho
 plugins/modules/cloud/rackspace/rax.py use-argspec-type-path # fix needed
 plugins/modules/cloud/rackspace/rax_files.py validate-modules:parameter-state-invalid-choice
 plugins/modules/cloud/rackspace/rax_files_objects.py use-argspec-type-path
-plugins/modules/cloud/rackspace/rax_mon_notification_plan.py validate-modules:parameter-list-no-elements
 plugins/modules/cloud/rackspace/rax_scaling_group.py use-argspec-type-path  # fix needed, expanduser() applied to dict values
 plugins/modules/cloud/scaleway/scaleway_organization_info.py validate-modules:return-syntax-error
 plugins/modules/cloud/smartos/vmadm.py validate-modules:parameter-type-not-in-doc