---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/48033#article
headline: "48033: Outgoing conversation: Invalid contact identity"
url: https://www.twilio.com/docs/api/errors/48033
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 48033: Outgoing conversation: Invalid contact identity

Log Type: APPLICATION

Log Level: ERROR

## Description

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

### Possible causes

* The contact chat identity was not formatted properly.
* A reserved identity was used for contact chat identity.

### Possible solutions

* Make sure that the contact chat identity returned from the CRM callback is formatted properly and does not violate the following rules.

  * Should not match a User SID pattern `US[0-9a-f]{32}`.
  * Should not be a reserved identity (`system`, `private`, `unique`).
  * Should not be longer than 256 characters.
* We recommend following the standard URI specification and avoid the following reserved characters `! * ' ( ) ; : @ & = + $ , / ? % # [ ]` for identity.