---
page_type: error
code: 50413
message: "50413: Account is not authorized to use proxy address"
level: ERROR
product: Programmable Chat
---

## Error - 50413

### Conversations: Account is not authorized to use proxy address

Your account is not authorized to use the requested proxy address.

#### Possible Causes

- The provided conversation proxy address is not allowed to be used under your account.

#### Possible Solutions

- Check that MessagingBinding.ProxyAddress parameter passed to API contains a proxy address that belongs to your account. For example, use a Twilio phone number that is purchased under the same project.