# 48025: Outgoing conversation: Invalid contact address

Log Type: APPLICATION

Log Level: ERROR

## Description

A conversation could not be created because the provided contact address was invalid.

### Possible causes

* The contact phone number used to initiate a new conversation was invalid.

### Possible solutions

* Make sure that the contact address returned from the CRM callback is correct and properly formatted in [E.164 format](/docs/glossary/what-e164), including any channel prefixes if relevant.
  * Check out the [docs](/docs/frontline/my-customers) on CRM callbacks for additional information.