DLT (Distributed Ledger Technology) registration is mandatory for all bulk SMS senders in India, as per TRAI guidelines. It ensures sender IDs and related details are verified to prevent spam and fraud. Previously, only SMS service providers needed registration, but now all businesses sending promotional or transactional SMS must register on the DLT platform.
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DLT (Distributed Ledger Technology) registration has been made mandatory by TRAI (Telecom Regulatory Authority of India) to regulate and safeguard the SMS ecosystem in India. It is a government initiative aimed at curbing spam, phishing, and fraudulent messages that often misuse sender identities to deceive recipients. By registering on a DLT platform, businesses verify their identity and messaging content, creating a more secure and transparent communication channel.
Due to rising cases of spam and fraud via SMS, TRAI made DLT registration mandatory from 2020 for all businesses that send bulk SMS. It helps:
If you're sending any type of bulk SMS, DLT registration is mandatory as per TRAI regulations. This applies to every entity — regardless of size, type, or industry — that uses SMS to communicate with customers, users, or members
Whether you're a startup, school, hospital, NGO, or large enterprise — if you send bulk SMS, DLT registration is mandatory.
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Choose a portal and sign up as a Principal Entity
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Register sender headers and upload SMS templates for approval
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Register sender headers and upload SMS templates for approval
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Link your SMS provider (telemarketer) to your DLT account
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Pick a custom toll-free number that fits your brand.
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Choose a portal and sign up as a Principal Entity
03
Register sender headers and upload SMS templates for approval
04
Link your SMS provider (telemarketer) to your DLT account
To complete DLT registration, you need the entity’s PAN card, Certificate of Incorporation or GST certificate, an authorization letter on company letterhead, and Aadhaar or PAN of the authorized signatory. These verify your business and ensure compliant SMS communication.
Most DLT platforms charge a nominal one-time fee of ₹500 to ₹5000. Additional small charges may apply for template and header registration, varying by operator. Some providers offer free entity registration but may charge for approvals.
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DLT (Distributed Ledger Technology) template registration is a mandatory process by TRAI (Telecom Regulatory Authority of India) to regulate SMS communication and curb spam. All entities must register SMS message templates before sending bulk SMS.
Yes. Any business sending promotional, transactional, or service SMS to customers must register on a DLT platform and get content templates approved.
It’s a pre-approved message format that includes fixed text and optional variables (e.g., “Dear {#var#}, your OTP is {#var#}”).
Variables are placeholders for dynamic content. Format must be {#var#}, and each variable should be ≤30 characters.
No. SMS content must exactly match the approved template. Any change requires a new template registration.
Yes. The brand or sender name must appear clearly in the message, either in the body or as a footer.
It’s the alphanumeric (for transactional/service) or numeric (for promotional) identifier that appears as the sender of the SMS.
Common reasons include:
You must register with any TRAI-approved DLT platforms such as: