DLT Registration in India: Complete Step-by-Step Guide

Sending an SMS to a customer sounds simple.

You write the message, add the customer’s number, click Send, and expect it to arrive.

But if you are a business sending SMS in India, there is another step you need to know about: DLT registration.

Without proper DLT registration, your business SMS may not reach your customers.

So, what exactly is DLT registration? Who needs it? What documents do you need? How much does it cost? And how do you register?

This guide explains the complete DLT registration process in simple language, including the latest requirements and changes businesses should know about in 2026.

What Is DLT Registration?

DLT stands for Distributed Ledger Technology.

If you want to understand the technology behind DLT, you can read our detailed guide on what DLT means.

For SMS, however, you don’t need to understand all the technical details.

DLT registration is the process of registering your business, sender ID, and SMS templates on a telecom DLT platform before sending commercial SMS in India.

The system was introduced under TRAI’s Telecom Commercial Communications Customer Preference Regulations (TCCCPR), 2018.

The basic idea is simple.

Before a commercial SMS reaches a customer, the telecom network checks whether the sender and message match the information registered on the DLT platform.

This process is commonly known as scrubbing.

Your SMS generally needs to match three important things:

1. Your business – registered as a Principal Entity
2. Your sender ID – registered as a Header
3. Your message – registered as a Content Template

If these details don’t match the DLT records, the message can be rejected instead of being delivered.

Who Needs DLT Registration?

If your business sends commercial SMS in India, you generally need to complete the applicable DLT registration and compliance requirements.

This can include businesses sending:

• OTPs and verification codes
• Order confirmations
• Delivery updates
• Payment notifications
• Appointment reminders
• Service alerts
• Promotional offers
• Discount messages
• School or coaching fee reminders
• Loan and EMI notifications
• Insurance-related communications

DLT requirements are not limited to large companies.

A small startup sending a few hundred SMS messages can also need to follow the same framework.

The type and volume of your business do not automatically remove the requirement.

Principal Entity vs Telemarketer

You will usually come across two important terms during the DLT registration process:

Principal Entity (PE):
The business or organisation that wants to send the SMS.

Telemarketer (TM):
The telecom or SMS service provider that helps transmit the messages.

For example, suppose you run an online store and use an SMS provider to send order updates.

Your online store is the Principal Entity.

Your SMS provider acts as the Telemarketer.

You register your business as the Principal Entity, while your SMS provider provides the information needed to connect the two.

What Happens If You Don’t Complete DLT Registration?

The biggest problem is simple:

Your SMS may not be delivered.

Imagine a customer is trying to log in to your website but never receives the OTP.

Or you send an important payment notification, but the customer never sees it.

Or your marketing team launches an SMS campaign that appears to be sent successfully, but customers don’t receive the messages.

DLT compliance can be one of the reasons behind such delivery problems.

There can also be regulatory consequences for businesses that violate applicable telecom communication rules.

TRAI’s enforcement framework includes actions against telecom resources, SMS headers, and senders involved in prohibited or non-compliant communications.

This is why businesses should not treat DLT registration as optional paperwork.

Documents Required for DLT Registration

Before starting your registration, keep the required documents ready.

Having the correct documents can save you from unnecessary rejection and delays.

Commonly requested documents include:

Document	Who May Need It	Purpose
PAN card	Businesses and entities	Business identification
GST certificate	GST-registered businesses	Business verification
Certificate of Incorporation/Registration	Companies, LLPs, societies, trusts, etc.	Proof of registration
Partnership deed	Partnership firms	Business verification
Authorisation letter	Businesses/entities	Authorises the signatory
ID proof of authorised signatory	Authorised signatory	Identity verification
Business address proof	Businesses/entities	Address verification
TAN	Where applicable	Tax-related verification
Company seal/stamp	Where required	Document authentication
Mobile number and email	Authorised person	OTP and communication

The exact documents can vary depending on your business structure and the DLT portal you use.

3 Things to Check Before Uploading Documents

1. Keep your business name consistent

Your business name should match across your important documents and the registration application.

Even small differences in the name can create verification problems.

2. Upload clear documents

Make sure scans and photographs are readable and meet the portal’s file-size requirements.

3. Keep the authorised person available

The authorised signatory may need to complete OTP or other verification steps during registration.

Which DLT Platform Should You Use?

Several telecom operators provide DLT platforms.

Some commonly used platforms include:

Telecom Operator	DLT Platform
Reliance Jio	TrueConnect
Vodafone Idea	Vilpower
Airtel	Airtel Commercial Communication
BSNL	UCC BSNL
Tata Teleservices	Tata DLT
Videocon/VMIPL	Smartping
MTNL	MTNL DLT

Do You Need to Register on Every DLT Platform?

No.

You generally need to register your Principal Entity on one DLT platform.

The DLT ecosystem is designed so that registered entities can be recognised across participating telecom networks.

So, don’t waste time creating multiple entity registrations simply because your customers use different telecom operators.

Choose one suitable DLT portal and complete your registration there.

How Much Does DLT Registration Cost?

There is no single fee that applies to every operator.

DLT charges can vary depending on the telecom operator and may change over time.

Depending on the platform:

• Entity registration may have a one-time fee.
• Some operators may provide registration without an entity registration fee.
• Header registration is generally not separately charged on the DLT portal.
• Content template registration is generally free on the portal.
• Your SMS provider may charge separate SMS or scrubbing-related fees.

Some DLT portals have historically charged fees in the range of a few thousand rupees, while others may offer registration free of charge.

Always check the current fee on the DLT portal before making a payment.

Also be careful with third-party companies that charge large amounts simply to “complete DLT registration” for you. In many cases, businesses can complete the process themselves if they have the required documents and information.

DLT Registration Process: Step by Step

Now let’s get to the part most businesses are looking for.

The DLT registration process can be broken into four main steps:

1. Register your business as a Principal Entity
2. Register your SMS Header
3. Register your Content Templates
4. Connect your SMS provider through the PE-TM chain

Let’s look at each one.

Step 1: Register as a Principal Entity

First, choose a DLT platform and start the Principal Entity registration process.

You will need to provide information about your business and upload the required documents.

Depending on the portal, you may need to provide details such as:

• Business name
• Business type
• PAN
• GST details
• Address
• Authorised person’s details
• Mobile number
• Email address

You will also need to complete the required verification steps.

Once your registration is approved, you receive a Principal Entity ID (PE ID).

Think of the PE ID as your business’s unique identity on the DLT platform.

Save this ID carefully.

Your SMS provider will usually need it to connect your account and send messages on your behalf.

Step 2: Register Your SMS Header

Next comes your Header, also commonly called your sender ID.

This is the identifier associated with your business when customers receive your SMS.

For example, a brand may use a sender name related to its business name.

The important thing is that the header must follow the applicable DLT rules and be relevant to your registered entity.

A generic sender name may not be approved simply because it sounds professional.

Your header category also matters because different types of communication are treated differently under the telecom framework.

Header Suffixes

Under the newer framework, telecom operators can append category suffixes to headers during message processing.

These categories include:

Suffix	Category	Example Use
-T	Transactional	Certain transaction-related messages
-S	Service	Order or service updates
-P	Promotional	Marketing and promotional messages
-G	Government	Government communications

You generally do not manually add these suffixes yourself.

The telecom system applies the relevant category based on the registered communication type.

This is why choosing the correct message category during registration is important.

Step 3: Register Your SMS Content Templates

This is one of the most important parts of DLT registration.

A content template is the message you plan to send to customers.

For example:

Dear {#var#}, your OTP for login is {#var#}. Valid for 10 minutes. Do not share it with anyone.

The parts that change, such as the customer’s name or OTP, are represented using variables.

Why Are Templates Required?

The DLT system uses registered templates to check whether the SMS being sent matches an approved message format.

If the actual SMS is significantly different from the registered template, the message may not pass the required checks.

Important Template Rules

When creating your templates, pay attention to the following:

1. Use variables correctly

Dynamic information such as names, order numbers, amounts, OTPs, or dates may need to be represented using approved variables.

2. Pre-tag variables where required

TRAI introduced requirements around pre-tagging variables in SMS content templates.

This helps identify what type of information will be inserted into each variable.

For example, a variable may represent:

• A URL
• A phone number
• An account number
• A customer name
• An OTP

3. Whitelist URLs

If your SMS contains a website link, you may need to whitelist the relevant domain or URL through the DLT platform.

Public URL shorteners can create compliance problems.

Instead of relying on a generic short URL, use an approved domain and follow the applicable DLT whitelisting process.

4. Select the correct category

Don’t register a promotional message as a service or transactional message simply to make delivery easier.

The category should match the actual purpose of the message.

Example of a Simple OTP Template

A basic OTP template could look like this:

Dear {#var#}, your OTP for login is {#var#}. It is valid for 10 minutes. Please do not share it with anyone. – BRAND

The exact template requirements can change, so always check the current rules on the DLT platform before submitting it.

Step 4: Connect Your SMS Provider

This step is often overlooked.

After registering your business, header, and templates, you need to connect your Principal Entity with the SMS provider that will send your messages.

This is known as the PE-TM chain.

Your SMS provider should provide its relevant Telemarketer information, including the Telemarketer ID (TM ID) where required.

You then add or bind the provider to your Principal Entity on the DLT platform.

If this relationship is not correctly configured, your SMS traffic may be rejected even if your entity, header, and template are already approved.

What Changed in DLT Rules in 2025 and 2026?

DLT compliance has changed significantly over the last few years.

If your business completed DLT registration several years ago, don’t assume everything is still the same.

Some important changes include:

Date	Important Change
1 Oct 2024	Restrictions around URLs, APKs, OTT links and callback numbers
1 Dec 2024	PE-TM chain requirements strengthened
12 Feb 2025	TCCCPR amendments introduced additional compliance requirements
6 May 2025	Header category suffixes introduced
7 May 2025	Service Explicit category discontinued
18 Nov 2025	Requirements introduced for pre-tagging variables
19 Nov 2025	1600-series requirements began for certain regulated entities
16 Dec 2025	1600-series requirements extended to certain insurers
1 Jan 2026 onward	Further 1600-series implementation phases
13 Mar 2026	Draft Third Amendment proposed additional anti-spam measures

What About the 2026 Third Amendment?

One important distinction is that the Third Amendment mentioned in the source material was still a draft at the time of this article’s September 2026 update.

That means businesses should not treat proposed changes as if they are already final regulations.

For current compliance requirements, always check the latest notified TRAI rules and directions.

Why Does DLT Registration Get Rejected?

Getting rejected does not necessarily mean there is a serious problem with your business.

Often, it is a simple documentation or template issue.

Here are some common reasons:

1. Business Name Doesn’t Match

The name on your PAN, GST documents, and application may not match properly.

Check the spelling and legal name before submitting.

2. Documents Are Unclear

Blurry scans, incomplete documents, or files that don’t meet the portal’s requirements can result in rejection.

3. Authorisation Letter Is Incorrect

Your authorisation letter may be missing a signature, date, seal, or other required information.

4. Header Is Too Generic

A header that does not clearly relate to your registered business or brand may not be approved.

5. Wrong Template Category

A marketing message should not be submitted under a category that does not match its actual purpose.

6. Too Many Variables

A template with excessive dynamic content may create approval problems.

Keep your message clear and include enough fixed content to explain what the SMS is about.

7. Variables Are Not Properly Tagged

If the platform requires variable pre-tagging, make sure every variable is correctly classified.

8. URL Is Not Whitelisted

A URL inside the SMS may need to be registered or whitelisted before the message can be delivered.

9. Business Details Are Invalid

Expired or incorrect registration details can cause verification problems.

10. Verification Is Not Completed

If the authorised signatory cannot complete OTP or other verification steps, the application may remain incomplete.

Tip: If a template gets rejected, read the rejection reason carefully and correct the existing submission instead of creating unnecessary duplicate registrations.

Conclusion

DLT registration may seem like another piece of paperwork your business has to deal with before sending SMS.

But the purpose is straightforward.

It creates a system where businesses, senders, and SMS content can be identified and checked before commercial messages reach customers.

For businesses, the most important thing is not just completing the registration.

You also need to make sure your Principal Entity, sender ID, content templates, URLs, and SMS provider connection are correctly configured.

If you’re starting from scratch, follow the process step by step:

Register your business → Register your header → Register your SMS templates → Connect your SMS provider → Test your messages.

And don’t stop there.

DLT rules continue to evolve, so businesses that rely on SMS for OTPs, alerts, notifications, or marketing should regularly check the latest TRAI requirements.

If you’re new to DLT and want to understand the technology first, start with our guide on what DLT means. If your goal is to start sending business SMS, this registration process is the practical next step.