diff --git a/app/v2/notifications/post_notifications.py b/app/v2/notifications/post_notifications.py
index 74961d778..80da6c16a 100644
--- a/app/v2/notifications/post_notifications.py
+++ b/app/v2/notifications/post_notifications.py
@@ -16,7 +16,7 @@ from app.models import (
     SMS_TYPE,
     EMAIL_TYPE,
     LETTER_TYPE,
-    # PRECOMPILED_LETTER,
+    PRECOMPILED_LETTER,
     PRIORITY,
     KEY_TYPE_TEST,
     KEY_TYPE_TEAM,
@@ -69,7 +69,7 @@ def post_precompiled_letter_notification():
 
     # Check both permission to send letters and permission to send pre-compiled PDFs
     check_service_has_permission(LETTER_TYPE, authenticated_service.permissions)
-    # check_service_has_permission(PRECOMPILED_LETTER, authenticated_service.permissions)
+    check_service_has_permission(PRECOMPILED_LETTER, authenticated_service.permissions)
 
     check_rate_limiting(authenticated_service, api_user)
 
diff --git a/tests/app/v2/notifications/test_post_notifications.py b/tests/app/v2/notifications/test_post_notifications.py
index 3e1140367..493aedf15 100644
--- a/tests/app/v2/notifications/test_post_notifications.py
+++ b/tests/app/v2/notifications/test_post_notifications.py
@@ -697,7 +697,25 @@ def test_post_email_notification_with_invalid_reply_to_id_returns_400(client, sa
     assert 'BadRequestError' in resp_json['errors'][0]['error']
 
 
-def test_post_precompiled_letter_notification_returns_201(client, sample_service, notify_user, mocker):
+def test_post_precompiled_letter_requires_permission(client, sample_service, notify_user, mocker):
+    mocker.patch('app.v2.notifications.post_notifications.upload_letter_pdf')
+    data = {
+        "reference": "letter-reference",
+        "content": "bGV0dGVyLWNvbnRlbnQ="
+    }
+    auth_header = create_authorization_header(service_id=sample_service.id)
+    response = client.post(
+        path="v2/notifications/letter",
+        data=json.dumps(data),
+        headers=[('Content-Type', 'application/json'), auth_header])
+
+    assert response.status_code == 400, response.get_data(as_text=True)
+    resp_json = json.loads(response.get_data(as_text=True))
+    assert resp_json['errors'][0]['message'] == 'Cannot send precompiled_letters'
+
+
+def test_post_precompiled_letter_notification_returns_201(client, notify_user, mocker):
+    sample_service = create_service(service_permissions=['letter', 'precompiled_letter'])
     s3mock = mocker.patch('app.v2.notifications.post_notifications.upload_letter_pdf')
     data = {
         "reference": "letter-reference",