# Brazil Letter of Authorization (LOA) guidelines

Before you begin, check the basics of [Brazil coverage, restrictions, and current regulations](https://www.infobip.com/docs/essentials/getting-started/sms-coverage-and-connectivity).

This page is created to address and answer the most frequently asked questions about the registration requirements for Brazil and how to complete the Letter of Authorization (LOA).

As per local regulations, alphanumeric senders can only be registered **by entities based in Brazil**.

There are three major networks in Brazil that support alphanumeric senders:

1. **Claro**
2. **TIM**
3. **Vivo**

## Registration requirements

The **Letter of Authorization (LOA)** is a mandatory document for SMS sender registration in Brazil. It verifies the legitimacy of the sender, ensures compliance with local regulations, and establishes accountability.

#### Sender requirements

* Must include only the **brand name**.
* Cannot contain special characters (including spaces and underscores).
* Must be written in **uppercase letters**.
* Cannot be **generic**, such as acronyms or short words that could apply to multiple companies.
* Maximum length is **11 characters**. Any sender name longer than this will be rejected.

## Local senders registration

A local sender is an entity that operates within Brazil and focuses on reaching recipients who are also located within the country.

To be considered **local traffic**, the company must have a registered entity in Brazil.

To register your sender, make sure to:

* Provide the required documents.
* Download and complete the [Letter of Authorization](https://infobip-cdn-h0h7ekhqhgh4hgau.a02.azurefd.net/1g8x60m5haaeebc38sw9etdnqwq2orfxs6yjtxwklw767cqz71/termo-de-autorizacao-uso-sender-id.docx) fully and accurately.

Note
- Only alphanumeric senders are allowed for local registration.
- Any sender that is not registered will automatically be converted into a short code.

Once you download the LOA template, make sure to complete it according to the following guidelines:

1. **Full name** of the appointed person
2. **ID number** of the appointed person
3. **Company name**
4. **Company Tax ID**
5. **Infobip** (as the authorized provider)
6. **Sender name** you are registering
7. **Infobip** (as the authorized provider)
8. **Date**
9. **Name**, **position**, and **signature** of the appointed company representative

The LOA must be signed by the company, authorizing Infobip to use their brand for SMS traffic.

## International senders registration

An international sender operates outside Brazil, but the target recipients are located within Brazil.

Registration is **not required** for international traffic. If you are sending **gambling or betting-related traffic** via short code, please contact the **Spam team** at _spam@infobip.com_ to request safelisting for this type of traffic.

Once all requirements and documents are completed, you can:

- Direct customers (end customers) - start the Sender ID registration process [here](https://portal.infobip.com/channels-and-numbers/channels/sms/overview), and click the **Request Sender** button under Alphanumeric Sender ID. Provide the necessary details and submit the request.
- Wholesales/partner - contact wholesale_registrations@infobip.com and your dedicated account manager, and provide the documents along with the required sender information.