# 50411: Participant address is empty

Log Level: ERROR

## Description

The provided participant public address parameter must not be empty.

### Possible causes

* MessagingBinding.Address parameter provided with the request contains an empty string.

### Possible solutions

* Add a non-empty MessagingBinding.Address parameter to the API request and supply a valid participant address matching your desired channel, e.g. SMS, MMS or WhatsApp.