Why DLT Registration is Mandatory in India
The Distributed Ledger Technology (DLT) platform was mandated by TRAI (Telecom Regulatory Authority of India) in 2019 to combat spam and protect consumers. Every business sending commercial SMS in India — OTPs, promotions, alerts — must register their entity, sender IDs, and message templates on the DLT platform.
Non-compliant messages are automatically blocked by telecom networks, resulting in 0% delivery. Businesses face penalties and brand damage if they skip registration. The good news: registration is free, one-time, and straightforward with the right guidance.
Important: As of November 2019, all commercial SMS sent in India must comply with TRAI DLT regulations. Unregistered messages are blocked at the network level — no exceptions.
Understanding SMS Message Types
DLT classifies SMS into distinct categories — each with different rules on timing, DND, and allowed content
DLT Registration Process
Follow these 6 steps to get fully compliant on the TRAI DLT platform
Complete Document Checklist
Keep all these documents ready before starting your DLT registration to avoid delays
Common DLT Registration Mistakes
Learn from others — these errors cause rejection, delays, or delivery failures
Mismatched Business Name
High ImpactFix: Use the exact legal name as on GST — abbreviations cause rejection.
Template Variable Errors
High ImpactFix: Always wrap dynamic values in {#var#}. Plain brackets or missing syntax fail.
Wrong Message Category
Medium ImpactFix: OTPs must use Transactional. Marketing messages must use Promotional category.
Expired Documents
Medium ImpactFix: GST and other docs must be current. Re-upload before they expire each year.
Unregistered Sender ID
High ImpactFix: Every header used in campaigns must be registered — even temporary ones.
Single-Platform Registration
Low ImpactFix: Register on 2–3 platforms for redundancy and better delivery across all operators.