Some countries require sender IDs to be registered with an authority or with the mobile operators before you send. This usually concerns alphanumeric sender IDs. You handle this pre-registration in the dashboard under Settings -> Compliance.
Auf einen Blick
- You can currently register sender IDs for Austria, the United Kingdom, Turkey, France, Romania, Australia, the Czech Republic, Denmark, Thailand and Ukraine.
- Each country only asks for the details and documents its registry or its operators require.
- Every entry has to be actively submitted - creating it is not enough.
- In the Czech Republic, every registered sender ID costs a setup fee and a monthly fee, charged to your balance.
- You are informed by email when a sender ID is registered or rejected.
Supported countries
| Country | When required | Notes |
|---|---|---|
| Austria | Every alphanumeric sender ID, since 1 October 2026 | Public RTR register, owner data is published, justification in German |
| United Kingdom | Every alphanumeric sender ID | Generic sender IDs such as "Info" or "SMS" are blocked |
| Turkey | Every alphanumeric sender ID | Official document of the owner and a signed letter (NOC, template in the form) |
| France | Every alphanumeric sender ID | Letters and digits only, no spaces or special characters |
| Romania | Every alphanumeric sender ID | Signed agreements for Vodafone, DIGI and Telekom (templates in the form) |
| Australia | Every alphanumeric sender ID | Letter of authorization and organization information form (templates in the form), sender ID starts with a letter |
| Czech Republic | Every alphanumeric sender ID | Setup and monthly fee, see Costs |
| Denmark | As soon as your messages contain a link | Link, use case and sample message |
| Thailand | Every alphanumeric sender ID | Signed and stamped letter of authorization (template in the form), links only to the owner's own domain |
| Ukraine | Depending on network and type of traffic | Choice of network and sender category |
More countries will follow as soon as we can reliably cover the requirements of the respective operators.
Who can register
All roles can see the page; only the account Owner and Administrator can create and submit entries.
You do not have to create the sender ID under Settings -> Sender IDs first. The two areas are independent of each other.
Pre-filled entries
You may find entries under Compliance that you did not create yourself. These are sender IDs we have seen in your past traffic, or registrations we previously handled for you through support. Check and complete incomplete entries; registered ones need no action.
Register a sender ID
- Open Settings -> Compliance and click Register sender ID.
- In the first step, choose the destination country. Below it you see what the country requires and whether fees apply.
- In the second step, fill in the form, upload the required documents and save.
- Then submit the entry using Submit.
Step 4 is essential: an entry that is saved but not submitted will not be registered.
Details requested
The form adapts to the destination country. Typical details are:
- Owner (company/organization) - the company or organization your recipients see as the sender, not necessarily the owner of your seven account. If you send on behalf of a customer, enter the customer's details.
- Website and a short description of the company or the use case
- Message type, for example one-time codes, transactional or marketing messages
- Sample message - a typical message exactly as it will be sent
For Austria, the full address, a contact email, the reason for registration and a justification in German are added: one sentence explaining why the owner is entitled to the sender ID, for example "X ist ein Produkt der Y GmbH, siehe y.com". The register rejects entries without a comprehensible justification.
Documents
Some countries require documents such as a letter of authorization or a company registration certificate. Where the registrar provides a template, download it directly in the form, put it on the owner's letterhead, fill it in and upload it signed. PDF, JPG or PNG up to 10 MB are accepted. If you fill in an Excel template, upload it signed as a PDF.
Sender ID rules
The exact rules are shown in the form below the sender ID field. In general:
- Usually 3 to 11 characters (Australia: 2 to 11)
- Allowed characters depend on the country; France, for example, only allows letters and digits
- No leading or trailing space, no leading
+ - Not purely numeric - if you want to use a phone number as the sender, add it under Sender IDs instead
- In Austria, upper and lower case matter:
AcmeandACMEare two different sender IDs and need two registrations
The sender ID must identify the owner. Generic terms such as "Info", "SMS" or "Service" are rejected.
Each combination of country and sender ID can only exist once.
Publication of data
Achtung
By submitting, you agree that the details and documents are passed on to the registrar of the destination country. In Austria, the owner data including the contact email is published in the public RTR register. Use a functional address there, such as info@your-domain.com, instead of a personal mailbox.
Track the status
| Status | Meaning |
|---|---|
| Incomplete | Required details or documents are missing. The dashboard shows which ones. |
| Ready to submit | All details are complete, the entry has not been submitted yet. |
| Submitted | The entry is with us or with the registrar and waiting for its answer. |
| Registered | The sender ID is registered. For Austria, the date it becomes valid is shown below. |
| Already registered | The sender ID is already listed in the register for another owner (Austria). |
| Rejected | The registrar or our pre-check rejected the entry. The reason is shown below the status. |
| Blocked | The monthly fee was not paid (Czech Republic). Messages with the sender ID are rejected. |
| Cancelled | You cancelled the registration and the paid period has ended. |
We forward submitted entries to the registrar in batches and enter its answer. When a sender ID is registered or rejected, you receive an email.
Edit, delete and withdraw entries
- You can edit an entry while it is incomplete, ready to submit, already registered or rejected. It also stays editable after submission until we have forwarded it to the registrar. After an edit, submit it again.
- You can also correct the sender ID itself.
- After a rejection, correct the details and submit again. The rejection reason disappears.
- You can withdraw a submission as long as it has not been forwarded yet - delete the entry to do so.
- Registered entries cannot be deleted. In the Czech Republic you can cancel them (see below); otherwise contact support@seven.io.
Costs
In most countries, registration is free of charge for you. In the Czech Republic, the operators charge for every registered sender ID:
- EUR 39 one-time setup and EUR 39 per month per sender ID, both net
- The fee is shown in the form and in the confirmation dialog before you submit.
- Once the sender ID is registered, the setup fee and the first month are charged to your balance, then the monthly fee every month. You find a receipt for every charge under Billing.
If your balance is too low
The invoice stays open and is paid automatically as soon as your balance covers it, for example after an automatic top-up. You can also pay it directly under Billing. Until then you receive a daily reminder.
If the fee is still unpaid after 7 days, the invoice is canceled and the sender ID is set to Blocked. Messages with this sender ID to the Czech Republic are then rejected. Reactivate charges one month to your balance right away and the sender ID can be used again.
Cancel a registration
Cancel registration ends the monthly fee. The registration runs until the end of the paid month; after that it is Cancelled and messages with the sender ID are rejected. As long as we have not removed the sender ID at the registrar, you can reactivate it. After that, submit it again if needed; the setup fee then applies again.
After registration
The status "Registered" means that the operators of the destination country recognize your sender ID as registered. Nothing changes in your account: you keep sending as usual and do not have to activate the sender ID anywhere else.
Frequently asked questions
I do not send to any of these countries - do I need to do anything? No. The registration requirement only applies to messages to recipients in the respective country.
I use a phone number as the sender. Do I need to register? In the countries supported here, only alphanumeric sender IDs are registered. Numeric senders work without registration in Australia, for example. If in doubt, ask support@seven.io.
I use several sender IDs. Then create a separate entry for each sender ID and each country. There is no limit.
My destination country is not in the list. Write to us at support@seven.io. We will check whether and how the sender ID can be registered there.
For general background on registration requirements in other countries, see International SMS dispatch.