> For the complete documentation index, see [llms.txt](https://contactharald.gitbook.io/contact-harald-legals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contactharald.gitbook.io/contact-harald-legals/ask-harry/sms-sender-id-registration-and-compliance.md).

# SMS Sender ID Registration & Compliance

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<summary><strong>About the SMS Sender ID Register</strong></summary>

From 1 July 2026, Australian regulations require branded SMS Sender IDs (for example, dealership brand names) to be registered with the Australian Communications and Media Authority **(ACMA)**.

Unregistered Sender IDs may be labelled “Unverified” or blocked by Australian telecommunications providers.&#x20;

Contact Harald participates in the SMS Sender ID Register framework as an Electronic Messaging Service Provider **(EMSP)**.

<br>

</details>

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<summary><strong>What is a Sender ID?</strong></summary>

A Sender ID is the business name displayed at the top of an SMS message instead of a mobile number.

Examples:

* “ABC Motors”
* “ContactHarald”

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<summary><strong>Who needs to register?</strong></summary>

Any organisation using branded SMS messages sent to Australian mobile numbers must register their Sender IDs before 1 July 2026.&#x20;

</details>

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<summary><strong>Information we may require</strong></summary>

To register a Sender ID on your behalf, we may request:

* Australian Business Number (ABN)
* business/trading name
* trademark evidence (if applicable)
* website/domain ownership evidence
* proof of authorised representative
* valid use case for the Sender ID

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<summary><strong>Sender ID Requirements</strong></summary>

Sender IDs must:

* be between 2 and 11 characters,
* not contain only numbers,
* not contain “Unverified”,
* and comply with ACMA requirements.&#x20;

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<summary><strong>How registration works</strong></summary>

1. Customer submits Sender ID request
2. Contact Harald reviews eligibility and documentation
3. Registration request submitted via the ACMA framework
4. Customer completes any required verification steps
5. Sender ID activated once approved

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<summary><strong>Important dates</strong></summary>

* Registration period opened: 30 November 2025
* Enforcement commences: 1 July 2026

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### Support

For Sender ID registration assistance:\
<support@contactharald.com>&#x20;