diff --git a/manila/message/message_field.py b/manila/message/message_field.py
index 4640228d3f..ef6a36aa47 100644
--- a/manila/message/message_field.py
+++ b/manila/message/message_field.py
@@ -127,6 +127,10 @@ class Detail(object):
           "insufficient privileges or wrong credentials. Please check your "
           "user, password, ou and domain."))
 
+    NO_DEFAULT_SHARE_TYPE = (
+        '024',
+        _("No default share type has been made available. "
+          "You must specify a share type for creating shares."))
     ALL = (
         UNKNOWN_ERROR,
         NO_VALID_HOST,
@@ -151,6 +155,7 @@ class Detail(object):
         UNSUPPORTED_CLIENT_ACCESS,
         UNSUPPORTED_ADD_UDPATE_SECURITY_SERVICE,
         SECURITY_SERVICE_FAILED_AUTH,
+        NO_DEFAULT_SHARE_TYPE,
     )
 
     # Exception and detail mappings
diff --git a/manila/scheduler/drivers/filter.py b/manila/scheduler/drivers/filter.py
index db7c1ad6b3..de0b8b4b92 100644
--- a/manila/scheduler/drivers/filter.py
+++ b/manila/scheduler/drivers/filter.py
@@ -25,6 +25,8 @@ from oslo_log import log
 
 from manila import exception
 from manila.i18n import _
+from manila.message import api as message_api
+from manila.message import message_field
 from manila.scheduler.drivers import base
 from manila.scheduler import scheduler_options
 from manila.share import share_types
@@ -40,6 +42,7 @@ class FilterScheduler(base.Scheduler):
         self.cost_function_cache = None
         self.options = scheduler_options.SchedulerOptions()
         self.max_attempts = self._max_attempts()
+        self.message_api = message_api.API()
 
     def _get_configuration_options(self):
         """Fetch options dictionary. Broken out for testing."""
@@ -141,6 +144,13 @@ class FilterScheduler(base.Scheduler):
                     " and specify in request body or"
                     " set default_share_type in manila.conf.")
             LOG.error(msg)
+            self.message_api.create(
+                context,
+                message_field.Action.CREATE,
+                context.project_id,
+                resource_type=message_field.Resource.SHARE,
+                resource_id=request_spec.get('share_id', None),
+                detail=message_field.Detail.NO_DEFAULT_SHARE_TYPE)
             raise exception.InvalidParameterValue(err=msg)
 
         share_type['extra_specs'] = share_type.get('extra_specs') or {}
diff --git a/manila/tests/scheduler/drivers/test_filter.py b/manila/tests/scheduler/drivers/test_filter.py
index 685876a72f..6a7641f892 100644
--- a/manila/tests/scheduler/drivers/test_filter.py
+++ b/manila/tests/scheduler/drivers/test_filter.py
@@ -24,6 +24,7 @@ from oslo_utils import strutils
 from manila.common import constants
 from manila import context
 from manila import exception
+from manila.message import message_field
 from manila.scheduler.drivers import base
 from manila.scheduler.drivers import filter
 from manila.scheduler import host_manager
@@ -65,6 +66,29 @@ class FilterSchedulerTestCase(test_base.SchedulerTestCase):
         # no "share_proto" was specified in the request_spec
         self.assertNotIn('storage_protocol', retval[0])
 
+    def test___format_filter_properties_no_default_share_type_provided(self):
+
+        sched = fakes.FakeFilterScheduler()
+        create_mock_message = self.mock_object(sched.message_api, 'create')
+        fake_context = context.RequestContext('user', 'project')
+        request_spec = {
+            'share_properties': {'project_id': 'string', 'size': 1},
+            'share_instance_properties': {},
+            'share_type': None,
+            'share_id': 'fake-id1',
+        }
+        self.assertRaises(exception.InvalidParameterValue,
+                          sched._format_filter_properties,
+                          fake_context, {}, request_spec)
+
+        create_mock_message.assert_called_once_with(
+            fake_context,
+            message_field.Action.CREATE,
+            fake_context.project_id,
+            resource_type=message_field.Resource.SHARE,
+            resource_id='fake-id1',
+            detail=message_field.Detail.NO_DEFAULT_SHARE_TYPE)
+
     @ddt.data(True, False)
     def test__format_filter_properties_backend_specified_for_replica(
             self, has_share_backend_name):
diff --git a/releasenotes/notes/fix-1870280-share-type-user-message-902275047410bdbf.yaml b/releasenotes/notes/fix-1870280-share-type-user-message-902275047410bdbf.yaml
new file mode 100644
index 0000000000..c62e2db79a
--- /dev/null
+++ b/releasenotes/notes/fix-1870280-share-type-user-message-902275047410bdbf.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    New user message now alerts users when attempting to create a new
+    share without identifying a share type, either through request body
+    or by setting a default share type. See `bug #1870280
+    <https://bugs.launchpad.net/manila/+bug/1870280>`_ for more details.