This guide walks you through how to register multiple alphanumeric sender IDs in bulk when you're an EMSP (Electronic Messaging Service Provider) Partner registering on behalf of your end customers. It explains how to download the template, populate customer data, validate records, handle errors, and submit valid registrations. You'll also learn what to expect after submission and how to track registration status.
Note: Before using this flow, ensure your organization has completed the EMSP Partner onboarding process, including signing the Partner Addendum and being registered as a Participating Telco with ACMA.
Getting started
Navigate to Settings > Numbers and click Apply for ACMA registration, then select Bulk ACMA Registration.
The bulk registration wizard has 5 steps:
Your Business Details
Download Template
Upload & Validate
Review & Submit
Complete
Registration Process
Step 1: Enter your business details (EMSP Partner)
First, you'll provide information about your EMSP Partner organization. You only need to complete this step once - the details are saved for future bulk registrations.
Note: End-customer business details are captured per Sender ID within the spreadsheet template. This step is only for your EMSP partner business details.
Pre-filled information (read-only)
The system automatically retrieves your business information from the Australian Business Register:
EMSP Partner ABN - Your organization's ABN
EMSP Partner Legal Entity Name - Your registered company name
Required fields
Complete the following fields for your organization:
EMSP Partner Business Address - Enter your registered business address. Suggestions will appear as you type. Select your official head office address.
Business Website URL - Use the official website for the legal entity listed above.
Business Phone Number - Provide a generic business contact number (not tied to an individual).
Authorized representative
Important: This must be the ABR-listed contact or a delegated ACMA Assist user authorised to approve registrations for this EMSP partner.
Authorized Representative Name - Full name of the authorized contact
Authorized Representative Email - Business email address
Authorized Representative Phone - Mobile or business phone number
Click Save and Continue to proceed.
Step 2: Download template
Download the working file that contains your existing sender IDs requiring registration.
What's included in this file:
Included Content | Description |
|---|---|
Sender IDs requiring action (locked) | Pre-populated with your existing alphanumeric sender IDs |
Required registration fields (highlighted) | Empty columns you need to complete |
Built-in formatting guidance | Instructions in the template header |
Click Download working file (.csv) to save the template.
Tip: Save the file somewhere your team can collaborate before uploading.
Click Continue to upload when ready.
Step 3: Complete the template
Open the downloaded CSV file in your preferred spreadsheet application (Excel, Google Sheets, etc.).
Template columns
Column | Description | Required |
|---|---|---|
Sender ID | Pre-populated from your account (locked) | ✓ |
Account ID | The account/sub-account ID for this sender ID | ✓ |
Account Name | Account name for reference |
|
ABN | Customer's Australian Business Number | ✓ |
Business Legal Name | Customer's registered entity name | ✓ |
Business Address | Customer's registered business address | ✓ |
Business Address State | State/territory (e.g., Victoria) | ✓ |
Business Address Postcode | Postal code | ✓ |
Business Website | Customer's official website URL | ✓ |
Business Phone | Customer's business phone number | ✓ |
ACMA Assist Authorised Contact Name | Full name of customer's authorized representative | ✓ |
ACMA Assist Authorised Contact Email | Email of customer's authorized representative | ✓ |
ACMA Assist Authorised Contact Phone | Phone number of customer's authorized representative | ✓ |
Important: By uploading this file you confirm that all listed authorised representatives are aware of and agree to this ACMA registration on behalf of their business.
Save your completed file as a CSV before uploading.
Step 4: Upload & validate
Upload your completed CSV file for validation.
Drag and drop your file or click to browse
Supports .csv files only (max 10 MB)
Click Validate file
What we validate
The system validates each record against:
Required fields - Ensures all mandatory columns are populated
Domain ownership - Verifies website domains match business details
External services - Checks ABN validity against Australian Business Register
Sender ID format - Validates format rules (3-11 characters, starts with letter, alphanumeric only)
Sender ID match - Checks if sender ID matches the customer's registered business name, entity name, trademark, or domain
Validation progress
While validation runs, you'll see:
Total sender IDs detected
Records eligible for validation
Records skipped (missing required fields)
Processing progress (e.g., "Processing row 4 of 16...")
Note: Larger files may take longer to process. You can leave this page — validation will continue in the background.
Step 5: Review validation results
After validation completes, you'll see a summary of results.
Validation complete summary:
Category | Description |
|---|---|
Records processed | Total records in your file |
Valid | Records that passed all ACMA validation checks |
Requires correction | Records that need updates before submission |
Blocked | Records that cannot be submitted |
Skipped | Records with missing required fields |
Valid records
These records passed all ACMA validation checks and are ready to submit.
Click Submit [X] records to proceed with valid records.
Records requiring correction
These records need updates before they can be submitted. Common issues include:
Format errors - Problems in the file (format or missing required information)
Sender ID validation errors - The sender ID may not match the business details on file
Common validation error messages:
Error | Description |
|---|---|
Sender ID must be 2-11 ASCII characters (codes 32-126) | Sender ID length or character issue |
Sender ID does not sufficiently match registered business name | Business name match failed |
Sender ID cannot start or end with a space or underscore | Invalid characters at start/end |
Sender ID cannot contain the word 'unverified' | Reserved word in sender ID |
Note: Review the business details in the working file, correct the Sender ID so it matches the business, then re-upload the file.
Export validation results
Click Export validation results (.csv) to download a detailed error report showing:
Row-by-row correction reasons
Blocking reasons for each failed record
Validation status per record
Review outcome recommendations
Click Back to upload to fix errors and re-upload, or proceed with valid records only.
Step 6: Review & submit
Once you click submit, the system processes each eligible record.
Submission progress
"Submitting 1 of X sender IDs..."
You can leave this page — submission will continue in the background
Click Continue to summary when complete.
Step 7: Submission complete
After successful submission, you'll see the submission summary.
Submission summary
Metric | Description |
|---|---|
Successfully submitted | Number of records submitted for review |
Failed to submit | Number of records that failed during submission |
Eligible records in this run | Total valid records processed |
Note: Tracks sender IDs submitted for ACMA processing. Approval status can be viewed by going to Settings > Numbers in the Sinch Engage platform.
Submission received confirmation
Your [X] sender ID registrations have been received. Your submission will undergo internal review before submission to ACMA.
What happens next
After submission, your registrations follow this process:
Step | Description |
|---|---|
1 | Your submission undergoes internal review |
2 | Submitted to ACMA on your behalf, once approved by our internal team |
3 | Customer receives an email of approval in ACMA Assist (ABR contact or ACMA Assist authorised user) |
Customer approval readiness
Note: Confirm the approving contact (ABR contact or ACMA Assist authorised user) is ready to approve the registration in ACMA Assist once it is submitted.
Delays may occur if ACMA Assist access has not been configured in advance.
Learn more about ACMA Assist setup → Australia | How Alphanumeric Sender ID registration works with Sinch Engage
Viewing your registration status
You can check your sender ID registration status at any time:
Go to Settings > Numbers
View the Alphanumeric sender IDs section
Available statuses
Status | Description |
|---|---|
Pending Review | Application submitted, awaiting Sinch Engage review |
Pending ACMA Registration | Under review by ACMA |
Active/Verified | Approved and ready to use |
Requires Action | Additional information needed |
Download status report
You can download a CSV export of all sender IDs with their current registration status for tracking and customer communication.
Tips for successful bulk registration
Recommended batch sizes
We recommend submitting approximately 200 records per batch, especially for initial submissions. This allows:
Faster feedback loop to identify and fix issues
More manageable processing for our compliance team
Quicker turnaround on approvals
You can increase batch sizes once the process is proven and running smoothly.
Preparing your data
Collect accurate customer details - Ensure ABN, business name, and contact details are correct
Verify authorized contacts - Confirm each customer's authorized representative can approve in ACMA Assist
Match sender IDs to business names - Ensure each sender ID aligns with the customer's registered entity name, business name, trademark, or domain
Use valid formats - Sender IDs must be 3-11 characters, start with a letter, and contain only alphanumeric characters
Handling validation errors
Download the validation error report
Review each error reason
Correct the data in your working file
Re-upload the corrected file
Valid records from previous uploads are not affected