---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/53003#article
headline: "53003: Client received an invalid signaling message"
url: https://www.twilio.com/docs/api/errors/53003
inLanguage: en
dateModified: 2025-12-12T18:14:22.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 53003: Client received an invalid signaling message

Log Level: ERROR

## Description

Raised whenever the Client receives a message from the Server that the Client cannot handle.