---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/21257#article
headline: "21257: Invalid SIP Manipulation Policy SID"
url: https://www.twilio.com/docs/api/errors/21257
inLanguage: en
dateModified: 2026-03-11T18:38:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 21257: Invalid SIP Manipulation Policy SID

Log Type: APPLICATION

Log Level: ERROR

## Description

Operation could not be performed because the SIP Manipulation Policy SID does not exist.

### Possible causes

SIP Manipulation Policy SID is incorrect.

### Possible solutions

Verify the SIP Manipulation Policy SID is valid.