Sender IDs, Message Types and SMS Regulation in Nigeria
Every business SMS in Nigeria carries a sender ID that a network has approved for that business, is classed as promotional or transactional, and must respect the NCC's consumer rules. This guide explains each, and what a corporate organisation needs to get its name approved.
Why SMS is regulated
SMS reaches almost every phone in Nigeria, costs the recipient nothing to receive and is trusted more than email. That reach is exactly why it is abused, and why the Nigerian Communications Commission (NCC) and the networks control who can send, under what name and what.
Three problems drive the rules:
Unsolicited marketing
By 2016 subscribers were receiving so many unwanted promotional texts that the NCC directed all operators to honour a national Do-Not-Disturb register (short code 2442) or face a ₦5 million fine plus ₦500,000 for each day the breach continued (The Guardian).
Fraud and impersonation
A message that appears to come from "GTBank" or "MTN" is believed. Without control of sender names, anyone could send fake debit alerts, phishing links or SIM-swap prompts in a bank's name. Registered sender IDs tie every name to a verified company.
Consumer protection and privacy
Phone numbers are personal data under the Nigeria Data Protection Act 2023, and the NCC's Consumer Code of Practice requires licensees to respect each subscriber's recorded contact preferences and to explain how their information is used (NCC Consumer Portal).
The regulator is also tightening the international side: its July 2025 licence framework for international A2P messaging proposes a central NCC-overseen gateway and SMS firewall, and states that a message without a sender ID must not be accepted or delivered (BroadNet summary).
Sender ID rules
A sender ID is the name that appears in place of a phone number, such as GTBank, DSTV or LagosFresh. It must be registered with each network before use, and a name belongs to one organisation.
| Rule | Detail |
|---|---|
| Length | 3 to 11 characters; anything longer is cut off. |
| Characters | Letters and digits only. No spaces, symbols or emoji. |
| Case | Networks may show it in capitals; do not rely on mixed case. |
| Must identify the sender | The name, or a recognisable form of it, of the company or its registered brand. |
| No generic words | INFO, SMS, ALERT, PROMO, VERIFY, NOTIFY, OTP and CODE are rejected: they could be anyone. |
| No one else's name | No bank, government body (NCC, CBN, FIRS), telco or other company's brand you do not own or are not authorised to use. |
| No look-alikes | No digit-for-letter swaps (SH0P), no country codes (NG, +234). |
| One owner | A name already registered to another business is refused. |
Use separate sender IDs for service messages and marketing (for example LagosFresh for receipts and FreshDeals for offers). Mixing marketing into a transactional ID is the fastest way to have it flagged or suspended.
Names are approved network by network. If MTN and Airtel approve but Glo is still reviewing, messages to Glo subscribers may be refused or delivered under a generic name until Glo approves (Bulk SMS Nigeria, Telerivet, Twilio).
Promotional and transactional messages
Every sender ID is registered as one of two types, and the type decides the route, the hours and whether DND applies. The test is the content, not what the sender calls it: a message that sells is promotional.
| Rule | Transactional | Promotional |
|---|---|---|
| Purpose | Information the customer needs about their own account or order. | Selling, advertising or announcing offers. |
| Examples | OTPs, debit/credit alerts, receipts, delivery and appointment notices, password resets, account security warnings. | Discounts, new products, sales, event invitations, newsletters, seasonal greetings with an offer. |
| Consent | Implied by the customer's relationship with the business. | Explicit opt-in expected; every message should allow opt-out. |
| Do-Not-Disturb (2442) | Delivered to DND numbers. | Blocked for numbers on full DND, and for partial-DND numbers that did not choose that category. |
| Hours | 24 hours. | The networks enforce a quiet period of 8 PM to 8 AM WAT; messages are held or refused. |
| Content | Must carry no marketing: an alert with an offer attached is treated as promotional. | Must not be misleading; prices accurate; obscene or prejudicial content barred. |
| Price | Usually higher per page (priority route). | Usually lower per page. |
Subscribers manage DND by texting:
- STOP to 2442 — block all unsolicited messages.
- HELP — choose from 11 categories they still accept: banking and finance, real estate, education, health, consumer goods, communication and entertainment, tourism, sports, religion, new products and news.
- ALLOW — opt back in.
- STATUS — check their status.
(Source: NCC Consumer Portal.)
The 8 PM to 8 AM window is applied by the networks and bulk SMS providers as an NCC directive; the NCC's published consumer pages do not state it, so treat it as an operator rule rather than a quoted regulation (Telerivet, Sent).
Promotions themselves (competitions, prize draws, discounted bundles run by a licensee) need NCC approval before launch (NCC Guidelines on Promotional Advertisements).
Onboarding a corporate sender ID
A corporate sender ID is approved on the strength of two things: proof that the company exists (CAC) and a signed request on its letterhead showing it owns the name it wants. Requests go through a licensed aggregator such as Eudor, which files them with each network.
Required documents
| Document | What it proves | Notes |
|---|---|---|
| CAC certificate of incorporation (or business name registration) | The company is real. | RC or BN number must match the letter. |
| CAC status report or Form CAC 7 | Who the directors are. | Needed to check the signatory. |
| Authorisation letter on company letterhead | The company asks for this exact name and type. | Signed by a director, company stamp; template below. |
| Director's valid ID (NIN slip, passport, driver's licence) | The signatory is who they say. | Name must match the CAC directors. |
| Sample messages | What will actually be sent. | One per use case; decides transactional or promotional. |
| Trademark certificate or brand authorisation | Right to a name that differs from the company name. | Required when the sender ID is a brand, product or a client's name. |
| Regulator approval where relevant | Licence for regulated sectors. | Banks, fintechs, insurers, lotteries and betting firms usually need their CBN/NAICOM/NLRC licence; some networks ask banks for a separate no-objection letter. |
The steps
- Choose the name and type. Check it against the rules above; plan one ID per use (service and marketing apart).
- Prepare the letter on letterhead. Include the company name, RC number, address, the sender ID, the message type, what it will be used for, one or two sample messages, and a director's name, signature and stamp.
- Submit through the aggregator. Include the CAC documents and the director's ID. In the Eudor portal this is Sender IDs → Request a sender ID.
- Wait for network review. The aggregator files with each network. MTN, Airtel, Glo and 9mobile review independently; most approve within 1 to 5 working days when documents are complete.
- Fix and resubmit if rejected. Common reasons include the wrong signatory, an unclear sample, a generic name or missing brand proof. The other networks' approvals stand.
- Send. Keep to the registered type and sample use; a change of use needs a new request.
Agencies and resellers sending for a client need the client's own letter authorising the agency to use the client's name, plus the client's CAC documents. The agency's documents alone are not enough.
Sample authorisation letter
[Company letterhead: name, RC number, address, phone, email]
[Date]
The Manager, Sender ID Registration
[Aggregator name]REQUEST FOR SENDER ID REGISTRATION: "LAGOSFRESH" (TRANSACTIONAL)
We, Lagos Fresh Foods Ltd (RC 1234567), request registration of the sender ID LAGOSFRESH on MTN, Airtel, Glo and 9mobile for transactional messages to our customers: order confirmations, payment receipts and delivery notices.
Sample message:
"Your order LF-20931 of N12,500 has been received and will be delivered tomorrow before 2pm. Lagos Fresh."
We confirm that LAGOSFRESH is our registered name, that messages will be sent only to our customers, and that no promotional content will be sent under this sender ID.
Yours faithfully,
[Signature]
[Company stamp][Name], Director
Messages that should not be sent
The NCC's rules bar misleading, obscene and prejudicial content and unsolicited marketing; the networks add their own content filters on top, and these are what most rejections come from. Categories marked restricted can be sent only by a licensed business on its own approved sender ID, to customers who opted in.
| Category | Status | Why |
|---|---|---|
| Impersonation of banks, telcos, government or another brand | Prohibited | The core fraud vector: fake alerts, BVN/PIN requests, SIM-swap and phishing. |
| Requests for PINs, passwords, OTPs, BVN or card details | Prohibited | No legitimate sender asks for these by SMS. |
| Phishing or unknown short links (bit.ly and similar) | Prohibited / filtered | Hide the destination; widely used to steal credentials. Use your own domain. |
| Misleading offers, hidden charges, fake prizes and "you have won" messages | Prohibited | NCC promotional rules require honest, clearly priced offers; prize promotions need NCC approval. |
| Adult and obscene content | Prohibited | NCC bars obscene and profane content; it reaches minors. |
| Hate, ethnic or religious incitement, or prejudicial content | Prohibited | NCC bars racially or otherwise prejudicial content; public-order risk. |
| Marketing to DND numbers, after STOP, or without consent | Prohibited | Consumer Code of Practice and the 2442 directive; personal data rules under the NDPA 2023. |
| Marketing between 8 PM and 8 AM | Held or refused by networks | Protects subscribers' rest. |
| Political campaign messages | Restricted | Need the sender's authorisation and, in election periods, INEC and network rules. |
| Religious broadcasts | Restricted | Allowed only to people who chose the religion category or opted in. |
| Betting, gaming and lotteries | Restricted | Licensed operators only (NLRC/state licence); never to minors; no unsolicited sends. |
| Loans and credit offers | Restricted | Only CBN/FCCPC-registered lenders; aggressive or shaming debt-recovery messages to a borrower's contacts are barred. |
| Alcohol, tobacco and drugs; cannabis and controlled substances | Restricted / prohibited | Age-restricted products; controlled substances are illegal to advertise. |
| Marketing content on a transactional sender ID | Prohibited | Bypasses DND and quiet hours; gets the sender ID suspended. |
International SMS gateways (for example Twilio's Nigeria rules) list gambling, adult, money/loan, political, religious, controlled-substance, cannabis and alcohol content as prohibited for traffic they carry into Nigeria, which is stricter than the local routes.
Penalties and enforcement
The sender usually feels enforcement first through the networks, long before a regulator's fine.
Networks
A sender ID used for the wrong type or for barred content is suspended or blacklisted on that network, and repeat offenders lose their bulk SMS account with the aggregator. A blacklisted name is hard to get back.
NCC
The 2016 DND directive, issued under section 53 of the Nigerian Communications Act 2003, set a ₦5 million fine plus ₦500,000 a day for operators that kept sending unsolicited messages (The Guardian).
The Consumer Code of Practice Regulations allow warnings, fines and stricter penalties for repeat breaches (NCC Consumer Portal), and unapproved promotions can lead to suspension from promotional activity (NCC Guidelines on Promotional Advertisements).
Data protection
Sending to numbers collected without a lawful basis is a breach of the Nigeria Data Protection Act 2023, with fines up to the higher of ₦10 million or 2% of annual gross revenue for the largest data controllers (KPMG).
Criminal law
Impersonation and phishing by SMS are fraud and offences under the Cybercrimes Act, whatever the sender ID.
The practical rule for a corporate sender: register a name you can prove is yours, keep service and marketing on separate IDs, send marketing only to people who agreed, between 8 AM and 8 PM, and keep a record of each customer's consent.
Sources
- NCC Consumer Portal: Do Not Disturb (DND) service in Nigeria
- NCC Consumer Portal: Highlights of the Consumer Code of Practice Regulations 2024
- NCC Guidelines on Promotional Advertisements 2023
- The Guardian: NCC moves to sanction telecoms firms over unsolicited SMS, calls
- BroadNet: Nigeria A2P SMS 2026, NCC licence and single gateway
- Telerivet: SMS sender ID registration and DND rules in Nigeria
- Bulk SMS Nigeria: Sender ID guide
- Sent: Nigeria SMS guide
- Twilio: Nigeria SMS guidelines
- KPMG: Nigeria Data Protection Act 2023