diff --git a/app/notifications/rest.py b/app/notifications/rest.py
index 102a0ecd1..61bd66574 100644
--- a/app/notifications/rest.py
+++ b/app/notifications/rest.py
@@ -270,11 +270,15 @@ def send_notification(notification_type):
             [user.mobile_number, user.email_address] for user in service.users
         )
     ):
-        raise InvalidRequest(
-            {'to': [(
+        if (api_user.key_type == KEY_TYPE_TEAM):
+            message = 'Can’t send to this recipient using a team-only API key'
+        else:
+            message = (
                 'Can’t send to this recipient when service is in trial mode '
                 '– see https://www.notifications.service.gov.uk/trial-mode'
-            )]},
+            )
+        raise InvalidRequest(
+            {'to': [message]},
             status_code=400
         )
 
diff --git a/tests/app/notifications/rest/test_send_notification.py b/tests/app/notifications/rest/test_send_notification.py
index a4a1c23dd..47626ee85 100644
--- a/tests/app/notifications/rest/test_send_notification.py
+++ b/tests/app/notifications/rest/test_send_notification.py
@@ -704,10 +704,9 @@ def test_should_not_send_email_if_team_api_key_and_not_a_service_user(notify_api
         app.celery.tasks.send_email.apply_async.assert_not_called()
 
         assert response.status_code == 400
-        assert [(
-            'Can’t send to this recipient when service is in trial mode – see '
-            'https://www.notifications.service.gov.uk/trial-mode'
-        )] == json_resp['message']['to']
+        assert [
+            'Can’t send to this recipient using a team-only API key'
+        ] == json_resp['message']['to']
 
 
 def test_should_not_send_sms_if_team_api_key_and_not_a_service_user(notify_api, sample_template, mocker):
@@ -730,10 +729,9 @@ def test_should_not_send_sms_if_team_api_key_and_not_a_service_user(notify_api,
         app.celery.tasks.send_sms.apply_async.assert_not_called()
 
         assert response.status_code == 400
-        assert [(
-            'Can’t send to this recipient when service is in trial mode – see '
-            'https://www.notifications.service.gov.uk/trial-mode'
-        )] == json_resp['message']['to']
+        assert [
+            'Can’t send to this recipient using a team-only API key'
+        ] == json_resp['message']['to']
 
 
 def test_should_send_email_if_team_api_key_and_a_service_user(notify_api, sample_email_template, mocker):