Why your appointment reminders now say ‘Unverified’: the SMS Sender ID Register explained
SMS Sender ID Register explained: why branded texts and appointment reminders now show ‘Unverified’, who has to register, and a practice checklist to fix it.
If your booking reminders or recall texts now arrive from ‘Unverified’ instead of your business name, that name isn't registered on the ACMA's SMS Sender ID Register through the provider sending it. Since 1 July 2026, telcos must swap any unregistered sender name for ‘Unverified’ and group those texts in one thread with other unregistered senders, including scams. The fix: register it through your SMS provider.
Why do our texts suddenly say ‘Unverified’?
A sender ID (also called an alphanumeric sender ID or alpha tag) is the name shown at the top of a text instead of a phone number, such as ‘AusPost’ or ‘myGov’. As the ACMA explains, scammers copy well-known sender IDs, so their fakes appear in the same message thread as the real organisation's texts. In 2025 alone the National Anti-Scam Centre referred 921 unique sender IDs to telcos for disruption.
The response is the Telecommunications (SMS Sender ID Register) Industry Standard 2025. When the register went live on 1 July 2026, the ACMA set out the split: registered sender IDs keep showing the business name, while unregistered ones must be labelled ‘Unverified’ by the telco and grouped in a single thread. For now those texts are labelled rather than blocked. At launch the ACMA said telcos that break the rules face court-ordered penalties of up to $250,000 per contravention, a ceiling that new laws welcomed by the ACMA on 15 October 2026 are set to raise significantly.
In its May 2026 warning, ACMA member Samantha Yorke said messages labelled ‘Unverified’ "may be ignored or deleted by customers who are on high alert for scams." So a genuine recall reminder now looks like the texts patients are told to treat with caution, and the cost shows up as empty chairs and missed inspections.
Does the SMS Sender ID Register apply to our business?
Yes, if the people you text see a name rather than a number, whichever system sends it. That covers SMS and MMS sent on your behalf by booking systems, practice software, CRMs, property-management platforms and marketing tools. The ACMA's register FAQs confirm the reverse: if your messages show a phone number, no action is required. Messaging apps such as WhatsApp, iMessage and Facebook Messenger aren't covered either.
The texts most likely to carry your name:
- Medical and allied health: clinical reminders, results notices and health-awareness campaigns (see healthcare and medical IT).
- Dental: recall reminders and post-treatment follow-ups (see IT for dental practices).
- Pharmacy: script-ready and collection alerts (see pharmacy IT support).
- Real estate: inspection reminders, rent and maintenance notices (see real estate IT support).
One wrinkle catches practices out. A branded sender ID is one-way, so reminders that ask patients to "reply Y to confirm" usually come from a mobile number and sit outside the register. Best Practice's knowledge base is a good example: practices using Bp Comms only for appointment reminders aren't affected, but clinical reminders and health-awareness messages use an alpha tag and are. One practice can have one message stream working perfectly and another quietly turned ‘Unverified’.
| What appears at the top of the text | Covered by the register? | What to do |
|---|---|---|
| Your business name or a short form of it | Yes. It's your sender ID. | Confirm it's registered against your ABN through the provider that sends it. |
| Your software or platform's brand | Yes, but it's the platform's sender ID. | Ask the platform to confirm it's registered, and whether patients even recognise that name. |
| A mobile or virtual phone number | No. | Nothing to register. Tell customers which number you text from. |
| ‘Unverified’ | Yes. It's a sender ID that isn't registered, or isn't registered through the provider sending it. | Contact the provider now and work through the checklist below. |
Who registers the sender ID: you or your SMS provider?
Both of you have a part. The telco or message provider lodges the application, but the sender ID belongs to the business whose name it is, and someone authorised at that business has to confirm it. Ask each platform that texts in your name:
Whose sender ID is it?
If it's the platform's own brand, registration is their job. If it's your name, it's registered against your business.
Who lodged it, and through which provider?
That provider should be on the ACMA's list of approved telcos and message providers. Since 1 July 2026, only participating telcos can send sender ID texts at all.
Who received the confirmation email?
If it went to a former staff member or an unmonitored inbox, the application may be sitting unconfirmed.
A business that sends texts using your sender ID on your behalf, such as a marketing agency, is what the ACMA calls an entity associate. It must be approved to participate in the register, and your representative gets an email asking you to confirm both the registration and its permission to use the name. You also need to register through each telco or message provider you send with, so two platforms can mean two applications.
How do you register a sender ID?
For a business with an ABN, the ACMA's registration steps are: contact your telco or message provider, give them each sender ID you want, then confirm the application yourself. Two things trip people up first:
- Stale ABR details. The register checks the Australian Business Register's ‘authorised contact’ or ‘service of notice’ email to see who can act for your business. It does not use Relationship Authorisation Manager (RAM). Update your ABR contacts first, or ask your tax or BAS agent to.
- No myID. Confirming happens in ACMA Assist, which needs a myID at Standard identity strength or higher.
The name itself has rules. Under the ACMA's sender ID criteria it must be 2 to 11 characters, can't be only numbers, can't contain ‘Unverified’ and isn't case-sensitive. With an ABN, it must match your registered business name, company name, trademark or domain name, though a shortened form, an acronym, or added words about your role, location or purpose are allowed, the way ‘Australia Post’ becomes ‘AusPost’.
Once the provider lodges the application, the ACMA emails your contact with the subject ‘SMS Sender ID Register: request to confirm your application’. Sign in through the unique link in that email, or ACMA Assist won't connect your account to the application. The ACMA says most applications are approved within 24 hours of confirmation, though some sit ‘Under review’ for longer. You can also manage registrations in ACMA Assist directly, but self-registering doesn't replace registering through your telco, which is the only way to authorise it to send under your sender ID.
A practice manager's checklist for booking-platform SMS
Text yourself from every system: reminders, recalls, results, script alerts, rent notices, newsletters, review requests and payment reminders. Note what appears at the top of each.
List every sender name and the platform behind it.
Ask each platform the three questions above and file the answers with your supplier records.
Check your ABR record lists a current, monitored mailbox, not someone who left two years ago.
Get the confirming person a myID at Standard strength before you need it.
Find the confirmation email, including in junk folders. If nothing arrived, ask the provider which address they used.
Check the status in ACMA Assist: the Sender ID tab should say ‘Complete’, while ‘Pending’ means it's still awaiting your confirmation.
Re-check after any change: a new platform or SMS provider, a practice rename, or the authorised contact leaving.
What else helps patients and clients believe your texts?
Registration gets your name back. These habits make that name worth something:
Use one sender name and say so on your website, appointment cards and intake forms. The ACMA notes that customers who know your registered sender ID know to treat ‘Unverified’ texts and unknown numbers with caution.
Link only to addresses people already know, such as your own website or your booking platform's usual domain. Skip link shorteners and look-alike addresses.
Never ask for card numbers, passwords or bank changes by text.
For agencies handling bonds and rent, bank-detail changes are the heart of the payment redirection scam.
Protect your email name too.
The register only covers SMS and MMS; email spoofing is handled by the records in SPF, DKIM and DMARC explained.
Keep one known phone number alongside your sender name, which is worth planning with your business phone system.
Verify before you click.
If a "confirm your sender ID" email arrives unexpectedly, check with your provider that they lodged an application first.
Frequently asked questions
Is ‘Unverified’ the same as being blocked?
No. While the register grows, the ACMA says unregistered sender IDs are labelled, not blocked, so your message still arrives. It just lands in a single ‘Unverified’ thread alongside scams and other unregistered senders, where many people will ignore it. Your provider should also be on the ACMA's approved list, because only participating telcos can send sender ID texts.
Is it too late to register our sender ID?
No. The ACMA has said there's no cut-off date for registering, and it's urging businesses still sending unregistered branded SMS to talk to their messaging provider straight away. Once the sender ID is registered and your provider is sending under it, your texts show your name again. Allow time for the confirmation step and any review.
Do texts sent from a mobile number need to be registered?
No. The register only covers messages that use a sender ID, meaning a name in place of a number. If people see a mobile or virtual number at the top of your texts, there's nothing to register. Two-way reminders that ask people to reply usually work this way, because a branded sender ID can't receive replies.
Does it cost anything to register a sender ID?
The ACMA's FAQs don't list a register fee today; they say only that it will consult on fees in the future. Your SMS provider or booking platform sets its own pricing for sending messages, so check their terms. For most practices the bigger cost is staff time spent untangling ABR contacts and chasing confirmation emails.
Our booking platform says registration is handled. How do we check?
Ask the platform for the exact sender ID and the provider that registered it, then sign in to ACMA Assist, where the Sender ID tab should show ‘Complete’. Finally, send test texts to a few staff phones on different networks and look at the top of each message.
Does the register stop scammers pretending to be our business?
It makes faking your name in the sender field much harder, because telcos must replace unregistered sender IDs with ‘Unverified’. It does nothing about scam texts from ordinary phone numbers, or messages on WhatsApp, iMessage and Facebook Messenger, which the rules don't cover. Telling patients exactly how you contact them still matters.
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