---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/phone-numbers/regulatory/letter-authorization-loa-template#article
headline: Letter of Authorization (LOA) Template
description: A templated example of a Letter of Authorization (LOA) requesting authorization for inbound customer calls made to your business' Customer Support.
url: https://www.twilio.com/docs/phone-numbers/regulatory/letter-authorization-loa-template
inLanguage: en
dateModified: 2026-03-09T18:47:22.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Letter of Authorization (LOA) Template

\[END USER BUSINESS LETTERHEAD]

\[DATE]

To Whom It May Concern:

\[END USER BUSINESS NAME], with company registration number \[COMPANY REGISTRATION NUMBER], provides \[DESCRIPTION OF SERVICES]. By way of this letter, \[END USER BUSINESS NAME] requests to obtain the right to make use of \[COUNTRY AND NUMBER TYPE] number(s).

To provide support to customers in \[COUNTRY], \[END USER BUSINESS NAME] requires \[COUNTRY AND NUMBER TYPE] number(s) to facilitate service requests from these customers.

\[END USER BUSINESS NAME] agrees to use the number(s) exclusively for inbound customer calls made to Customer Support or similar services in connection with \[END USER BUSINESS NAME]'s business and agrees that it will not permit use of the number(s) by third-party users for their own purposes. Further, \[END USER BUSINESS NAME] will not use the number(s) for Callback, Calling Cards, and/or Third Country Calling.

\[END USER BUSINESS NAME] is aware of the country restrictions with respect to the number(s) and will respect them.

Sincerely,

\[SIGNATURE OF AUTHORIZED SIGNATORY]

\---------------------------------------------------

NAME:

TITLE:

PHONE NUMBER:

EMAIL:

Company Stamp: