---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/11010#article
headline: "11010: Letter of Authorization incomplete or invalid"
url: https://www.twilio.com/docs/api/errors/11010
inLanguage: en
dateModified: 2026-10-07T05:21:12.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 11010: Letter of Authorization incomplete or invalid

Log Type: TWILIO

Log Level: ERROR

## Description

The Letter of Authorization (LOA) submitted with the Branded Calling registration contains incomplete, missing, or incorrect information.

### Possible causes

* The LOA is missing required fields or contains inaccurate information.
* The information provided in the LOA cannot be linked to the business.
* LOA isn't signed by the authorized contact.

### Possible solutions

* Review the LOA to ensure all required fields are accurately completed. Resubmit the registration with a corrected LOA for verification.

#### Additional resources

* [Getting Started Branded Calling](/docs/voice/branded-calling)