---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/520003#article
headline: "520003: Observation not found"
url: https://www.twilio.com/docs/api/errors/520003
inLanguage: en
dateModified: 2026-04-01T03:32:01.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 520003: Observation not found

Log Type: TWILIO

Log Level: ERROR

## Description

Observation could not be located in the system.

### Possible causes

* Observation does not exist or has been removed or reconciled

### Possible solutions

* Verify the Profile ID and Observation ID
* Review observation reconciliation logs for details