Important: The regulatory landscape regarding alphanumeric Sender ID (formerly alpha tag) registration is continually evolving. While we strive to provide the most current information, we strongly advise checking the Australian Communications and Media Authority (ACMA) website directly for the latest guidance and updates. These FAQs are based on information available from the ACMA as at the date of this article, which is yet to include detailed information about the register/sender ID application process, access to the register or administration of the register.
The sender ID register and how it is proposed to work
Q: What is an alphanumeric sender ID (formerly alpha tag)?
A: When you receive an SMS or MMS message there is an identifier letting you know who it's from. That's the Sender ID. It's an alphanumeric header - a mix of letters, numbers, and maybe a few symbols. Examples of alphanumeric Sender IDs include names like ‘ATO’, ‘AusPost’, or ‘myGov’. This ID is your way of instantly recognising trusted senders. Other kinds of Sender IDs include a mobile number or a short number (e.g., 1223).
Q: What is the purpose of the SMS Sender ID register?
A: The SMS Sender ID register is here to safeguard you and the businesses that reach out to you through messages. How? By disrupting impersonation scams. These scams happen when fraudsters use fake Sender IDs that look like well-known brands, like banks or government agencies, to access and steal their personal info or money.
Q When will the SMS Sender ID register be ready?
A: The register is open from 30 November 2025, with enforcement from 1 July 2026.
Q: How will the register work for businesses?
A: In Australia, the upcoming registration model will be a must-do for anyone using alphanumeric Sender IDs (formerly alpha tags) to send SMS or MMS messages to Australian mobile numbers. This means you'll need to register any alphanumeric Sender IDs you plan to use.
This registration ensures that only businesses with a genuine connection of the tag can use sender IDs.
Q: What happens if I don't register by the deadline?
A: From 1 July 2026, all alphanumeric Sender IDs used for sending messages to Australian mobile numbers must be registered and approved by the ACMA. Unregistered alphanumeric sender ID messages will be sent with the generic 'Unverified' label.
Q: Can I register through Vodafone Business?
A: Yes, for Messaging Hub customers, once TPG Telecom has been approved as a participating telco, registration can be initiated through Vodafone Business Messaging Hub. Registration can also be via another participating telco or directly via ACMA Assist. A list of all participating providers will be available on the ACMA’s website.
Q: What information will I need to provide to register my Sender ID?
A: In order for Vodafone Business to initiate registration of the alphanumeric Sender ID on your behalf, you will need to provide:
- Full entity name and Australian Business Number (ABN).
- Contact information of an authorised representative (legal name and business email) for the entity on the Australian Business Register - this is critical for ACMA’s verification process.
- Valid use case details showing a match between the Sender ID and the entity. To have a sender ID match, the sender identification must be the same as a contraction or abbreviation of or an acronym of:
- the registered business name;
- the company name;
- the registered trade mark; or
- the domain name.
Sender ID may also include another word or other words associated with the entity’s functions.
Q: Why do I need to go through the registration process for my alphanumeric Sender ID (formerly alpha tag) when I have already done this recently?
A: Our previous approval process for alphanumeric Sender IDs (alpha tags) was implemented where there was no central Sender ID Register in place. Even though you've recently gone through an approval process, these alphanumeric sender IDs must now be registered through ACMA's official framework. This is to ensure all alphanumeric Sender IDs comply with ACMA's new requirements.
Q: Who is authorised to register alphanumeric Sender IDs (formerly alpha tags) under the new ACMA process?
A: Only the following types of entities can participate in the Register:
- an individual;
- a body corporate;
- a corporation sole;
- a body politic;
- a government entity;
- a partnership;
- any other unincorporated association or body of persons;
- a trust; and
- a superannuation fund.
For entities with an ABN, the authorisation process requires:
- Verification of the entity’s legitimacy and their authorised representatives.
- Identification of the representative responsible for registering, which could include individuals or business administrators tied to the entity on platforms like the Australian Business Register (ABR).
Q: Will registering alphanumeric sender IDs (formerly alpha tags) under the ACMA process cost anything?
A: There may be an applicable charge associated with registering sender IDs, including any ongoing annual charge. The exact cost details will be provided once the ACMA finalises and communicates the fee structures. We are committed to updating our customers with more information as soon as it becomes available from the ACMA.
Q: Can I use my registered sender ID with other telecommunications providers?
A: Yes, once your sender identification is registered, you will be able to authorise other participating telecommunications providers to originate messages using that same sender identification.
Q: Does the register affect SMS sent by consumers?
A: No, the register won't impact any SMS messages you send directly from your personal mobile device to another person.
Q: How do I register my Sender ID with the ACMA via Vodafone Business?
A: Step 1 – Registration of sender identification
Registration is initiated through the alphanumeric Sender ID management section via Settings > Numbers in your Messaging Hub account. The system will need to validate your alphanumeric sender ID with your business entity details, and provide contact details of an authorised representative, ensuring these matches the Australian Business Register.
Once submitted, Vodafone Business reviews the application to ensure there is a valid use case. If accepted, Vodafone Business informs the customer.
Step 2 – Verification of the Sender ID
The ACMA will then contact the entity's representative via email to verify the registration in the ACMA Assist portal. We anticipate that the representative will need to verify their identity, select TPG Telecom as their participating telecommunications provider on the ACMA Assist Register. Vodafone Business will be notified by ACMA upon approval.
Upon completion, ACMA confirms the registration with Vodafone Business, which updates your Sender ID status to "Approved" in their account. They will also receive an email notification of successful registration.
Alphanumeric sender ID format rules
Q: What characters are allowed in a sender ID?
A: Sender IDs must consist solely of characters with ASCII decimal codes 32–126. This includes all printable ASCII characters.
Q: What is the required length for a sender ID?
A: Sender IDs must be at least 2 characters and no more than 11 characters long.
Q: Can a sender ID be composed entirely of numbers?
A: No. Sender IDs must not consist solely of numbers; they must include at least one letter.
Q: Are there any restrictions on where certain characters can be used in a Sender ID?
A: Yes. Sender IDs must not contain a space or underscore at the beginning or end.
Q: Are there specific words that cannot be used in a Sender ID?
A: Yes. Sender IDs cannot include the word ‘Unverified’ or any term identified by the ACMA as a disruption term for unregistered Sender IDs. Additionally, no offensive, deceptive, or misleading words are allowed.
Q: Are Sender IDs case sensitive?
A: No, Sender IDs are case insensitive. For instance, ‘ABC’ is considered the same as ‘abc’.
Q: Can multiple entities use the same Sender ID?
A: Yes, Sender IDs can be registered and used by multiple entities if each entity can prove a valid use case.
Q: Are there restrictions on certain Sender IDs due to sensitivity or risk?
A: Yes, some sensitive or high-risk Sender IDs may be limited to single registration to reduce harm if misused. Examples include government-related identifiers like ‘ATO’ or ‘Medicare’.
Q: Can generic words be used as standalone Sender IDs?
A: No, standalone generic Sender IDs like ‘Alert’ are prohibited. They can be misused to create false urgencies. However, using them with a qualifier, such as 'ACMA Alert’, is acceptable.
Conclusion
To ensure seamless messaging services and compliance with ACMA regulations, please proactively prepare for the upcoming changes in alphanumeric Sender ID registration. For further assistance or queries, contact support or visit the ACMA website for more detailed guidance.