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Messaging Registration

CarrierX messaging

To protect users from spam and unwanted messages, mobile carriers require the registration and vetting of applications that want to send messages to people, referred to as A2P (Application-to-Person). This allows carriers to know who is sending messages and the content of those messages. CarrierX will help you understand the requirements to streamline the review process.

Common Requirements​

There are some common requirements to keep in mind, regardless of the number type you choose.

Opt In​

For the majority of types of messages, it is a requirement that recipients opt in before receiving messages. The recipient needs to confirm that they understand what they will be receiving. Your registration should include a detailed description of how a user opts in to receive your messages. This opt-in process may also be called Call to Action.

Required Responses​

It is required that your application can receive and act upon two classes of keyword messages from users: STOP and HELP. You must have in place, systems to properly act on these messages before registering.

STOP​

If a users sends the keyword STOP or similar to your phone number, you are required to stop sending messages to the user's phone number. You can send a confirmation message telling the user they will not receive more messages. Unless the user explicitly opts in again, you must not send any messages to the user.

HELP​

If a user sends the keyword HELP or similar, your application should respond with a message that tells the user:

  • The program or brand name.
  • Additional customer care contact information, including a phone number or email address.
  • How to opt-out or stop receiving messages from you.
Sample HELP Response​
Made Up Company
Contact customer support at 800-555-1212
Text STOP to stop all messages
Msg&Data rates may apply

Use Case Description​

This is a description of what content subscribers are signing up to receive or the purpose of the messages.

Sample Message​

Provide samples of text and media sent to recipients. Supply samples of each type of message if a campaign may include multiple types.