diff --git a/app/notifications/validators.py b/app/notifications/validators.py
index d1bf7b589..93992c580 100644
--- a/app/notifications/validators.py
+++ b/app/notifications/validators.py
@@ -12,7 +12,8 @@ from app.dao import services_dao
 from app.dao.service_sms_sender_dao import dao_get_service_sms_senders_by_id
 from app.models import (
     INTERNATIONAL_SMS_TYPE, SMS_TYPE, EMAIL_TYPE, LETTER_TYPE,
-    KEY_TYPE_TEST, KEY_TYPE_TEAM
+    KEY_TYPE_TEST, KEY_TYPE_TEAM,
+    ServicePermission,
 )
 from app.service.utils import service_allowed_to_send_to
 from app.v2.errors import TooManyRequestsError, BadRequestError, RateLimitError
@@ -128,10 +129,15 @@ def validate_and_format_recipient(send_to, key_type, service, notification_type,
 def check_if_service_can_send_to_number(service, number):
     international_phone_info = get_international_phone_info(number)
 
+    if service.permissions and isinstance(service.permissions[0], ServicePermission):
+        permissions = [p.permission for p in service.permissions]
+    else:
+        permissions = service.permissions
+
     if (
         # if number is international and not a crown dependency
         international_phone_info.international and not international_phone_info.crown_dependency
-    ) and INTERNATIONAL_SMS_TYPE not in service.permissions:
+    ) and INTERNATIONAL_SMS_TYPE not in permissions:
         raise BadRequestError(message="Cannot send to international mobile numbers")
     else:
         return international_phone_info
diff --git a/tests/app/service/test_send_one_off_notification.py b/tests/app/service/test_send_one_off_notification.py
index a40909ae8..0b8e74cd4 100644
--- a/tests/app/service/test_send_one_off_notification.py
+++ b/tests/app/service/test_send_one_off_notification.py
@@ -103,6 +103,29 @@ def test_send_one_off_notification_calls_persist_correctly_for_sms(
     )
 
 
+def test_send_one_off_notification_calls_persist_correctly_for_international_sms(
+    persist_mock,
+    celery_mock,
+    notify_db_session
+):
+    service = create_service(service_permissions=['sms', 'international_sms'])
+    template = create_template(
+        service=service,
+        template_type=SMS_TYPE,
+    )
+
+    post_data = {
+        'template_id': str(template.id),
+        'to': '+1 555 0100',
+        'personalisation': {'name': 'foo'},
+        'created_by': str(service.created_by_id)
+    }
+
+    send_one_off_notification(service.id, post_data)
+
+    assert persist_mock.call_args[1]['recipient'] == '+1 555 0100'
+
+
 def test_send_one_off_notification_calls_persist_correctly_for_email(
     persist_mock,
     celery_mock,