---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/54351#article
headline: "54351: Invalid identity"
url: https://www.twilio.com/docs/api/errors/54351
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 54351: Invalid identity

Log Level: ERROR

## Description

Identity must be a string with length 1-256.

### Possible causes

* The value supplied by the Identity parameter is an empty string.
* The value supplied by the Identity parameter exceeds 256 characters.

### Possible solutions

Confirm than an Identity string parameter of 1-256 characters is being passed in request.