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What is the Process of DLT Registration in India?

What is the Process of DLT Registration in India?

Profile Headshot of Nisha Bhakar
Nisha Bhakar

3
mins read

April 26, 2025

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Key Takeways

In India, the Telecom Regulatory Authority of India (TRAI) has implemented the Distributed Ledger Technology (DLT) platform to regulate and monitor commercial communications, aiming to curb unsolicited messages and enhance transparency. 

DLT registration is a mandate for any business wanting to send SMS in India. As of December 1, 2024, new regulations have been introduced to further strengthen this framework. ​ 

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

  1. Select a DLT Portal: Begin by choosing a telecom operator's DLT platform for registration. Registration on one platform is recognized across all. Here are some options:
  2. Register as a Principal Entity (PE): Sign up as a Principal Entity on the chosen DLT portal. You'll need to provide:
    • Business Details: Name, address, and type of organization.
    • Authorized Signatory Information: Name, designation, and contact details.​
    • Documents: 
      • PAN Card of the business.
      • Certificate of Incorporation or GST Certificate.
      • Letter of Authorization on company letterhead.
      • ID proof of the authorized signatory.
      • Proof of address.
  3. Complete KYC Verification: Upload the necessary documents for Know Your Customer (KYC) verification. The verification process typically takes 1-3 working days. Upon approval, you'll receive a unique Entity ID.
  4. Register Headers (Sender IDs): Post approval, register your Sender IDs, known as Headers. Headers are alphanumeric strings representing your brand in SMS communications. They are categorized as:
    • Promotional: Used for marketing messages; typically numeric.​
    • Transactional: Used for essential information like OTPs; typically alphabetic.​
    • Service (Implicit and Explicit): For informational messages; can be alphabetic or numeric.​

  1. Register Content Templates: All message content must be pre-registered and approved to ensure compliance. Templates should include fixed content and variables for dynamic information. For example:
    • "Dear {#var#}, your OTP is {#var#}. Valid for 10 minutes."​ Ensure templates adhere to TRAI guidelines to avoid rejections.

You can also refer to our guide on DLT content templates for a detailed coverage on this topic. 

  1. Obtain Customer Consent: Before sending promotional messages, secure explicit consent from recipients. The opt in text messaging and consent records should be maintained and may need to be uploaded to the DLT platform. 
  2. Associate with Telemarketers: Link your Entity ID with registered aggregators like Message Central who will facilitate the delivery of your messages. This association ensures compliance and smooth message transmission.
  3. Start Messaging: After completing the above steps and receiving necessary approvals, you can commence sending messages through your chosen platform, ensuring adherence to registered headers and templates.

Recent Updates

TRAI has introduced additional measures to enhance the security and traceability of commercial communications:-

  • PE-TM Linkage: Effective December 1, 2024, the PE-TM (Principal Entity–Telemarketer) chain has been introduced to ensure the traceability of SMS communications. This mechanism links Principal Entities (PEs) with Telemarketers (TMs) to prevent spam and the misuse of SMS headers and templates. ​ 
  • Content Scrutiny: Telecom operators are now required to review and verify the headers and content templates registered on the DLT portal to ensure compliance with regulations. ​ 

OTP SMS Authentication with Message Central

Message Central is a CPaaS platform providing authentication and communication solutions to businesses. You can use Message Central to enable OTP verification without any DLT registration in India.
You will be using Message Central’s DLT approved template and can customize the same for your brand name.

You can simply signup for free and get started.

Frequently Asked Questions

How do I choose the right OTP service provider?

When selecting an OTP SMS service provider, focus on:

  • Delivery reliability and speed
  • Global coverage and local compliance
  • Multi-channel support and fallback
  • Ease of integration
  • Pricing transparency

The right provider should not just send OTPs but ensure they are delivered consistently across regions and networks.

Not all OTP SMS service providers are built the same.

Some optimize for cost, others for flexibility but very few balance delivery reliability, global coverage and ease of use. And that balance is what actually impacts whether your users receive OTPs on time.

If OTP is critical to your product, focus on:

  • reliable delivery (not just sending)
  • multi-channel fallback
  • scalability across regions

Try It for Yourself

Why is multi-channel OTP important?

Relying only on SMS can lead to failed verifications due to:

  • network issues
  • telecom filtering
  • device limitations

Multi-channel OTP systems (SMS + WhatsApp + voice) improve success rates by automatically retrying through alternative channels if one fails.

What is the best OTP SMS service provider in India?

Some of the commonly used OTP SMS service providers in India include MSG91, Exotel and 2Factor.

That said, India has additional challenges like DLT compliance and operator filtering. Platforms that handle these internally while also offering fallback options tend to provide more consistent OTP delivery.

Which is the cheapest OTP service provider?

Providers like Fast2SMS and 2Factor are often considered among the cheapest OTP service providers, especially in India.

However, lower pricing can come with trade-offs such as:

  • lower route quality
  • higher delivery delays
  • limited fallback options

For mission-critical OTP flows, reliability often matters more than just cost.

Which is the best OTP service provider in 2026?

The best OTP service provider depends on your use case.

  • For global scale and flexibility: Twilio, Infobip
  • For cost-effective APIs: Plivo
  • For India-focused SMS OTP: MSG91, Exotel

However, platforms like Message Central stand out by balancing global coverage, multi-channel fallback and ease of deployment, making them suitable for businesses that prioritize delivery reliability.

What is an OTP service provider?

An OTP service provider enables businesses to send temporary verification codes to users via channels like SMS, WhatsApp or voice to authenticate logins, transactions or sign-ups.

Modern OTP SMS service providers go beyond just sending messages, they ensure reliable delivery using optimized routing, retries and sometimes multi-channel fallback.

Ready to Get Started?

Build an effective communication funnel with Message Central.

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