---
page_type: error
code: 21713
message: "21713: Messaging Service Use Case is Invalid"
level: ERROR
product: Programmable SMS
---

## Description

The Messaging Service use case you are trying to specify in the request is not a valid use case.

### Possible Causes

- The Messaging Service use case specified in the request is not a valid Messaging Service use case. Valid Messaging Service use cases include: discussion, marketing, notifications, poll, undeclared and verification.

### Possible Solutions

- Verify that you are spelling the use case correctly in your request and that it is using all lowercase letters.