---
page_type: error
code: 50407
message: "50407: Invalid messaging binding address"
level: ERROR
product: Programmable Chat
---

## Error - 50407

### Conversations: Invalid messaging binding address

An invalid participant public address was supplied.

#### Possible Causes

- Participant MessagingBinding.Address parameter provided with the request is not a valid participant address.

#### Possible Solutions

- Check that the length of MessagingBinding.Address parameter does not exceed 256 characters.
- Ensure that MessagingBinding.Address parameter contains an address with valid syntax (e.g. SMS phone numbers must follow [E.164 format](/docs/glossary/what-e164)).