---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32212#article
headline: "32212: SIP: Registration Authentication problem"
url: https://www.twilio.com/docs/api/errors/32212
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32212: SIP: Registration Authentication problem

Log Level: WARNING

## Description

### Possible causes

A SIP Endpoint tried to register with this SIP Domain and there isn't a Credential List mapped.

### Possible solutions

Please map a Credential List to the Registration Authentication part of the SIP Domain