---
title: "DLT Registration and Template Approval for Inbound/Outbound Indian SMS"
---

DLT Registration and Template Approval for Inbound/Outbound Indian SMS: SMSRiver

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Telecom Regulations & A2P 10DLC

Published 2026-09-11

•

8 min read

# DLT Registration and Template Approval for Inbound/Outbound Indian SMS

Comprehensive guide to Distributed Ledger Technology (DLT) compliance under TRAI in India. Entity registration, header approval, and template scrubbing.

Key Takeaway & Executive Summary

TRAI mandates DLT registration for all Indian SMS traffic. Learn how template variable scrubbing and header approval prevent total message rejection.

The Telecom Regulatory Authority of India (TRAI) mandates that all commercial SMS messaging operate through Distributed Ledger Technology (DLT) platforms (such as Jio, Airtel, or Vil DLT). Messages that fail to match registered templates character-for-character are rejected immediately by carrier scrubbers.

## Table of Contents

- [DLT Regulatory Architecture](#section-1)

- [Frequently Asked Questions](#frequently-asked-questions)

## 1 DLT Regulatory Architecture

To deliver SMS in India, senders must register three components:

1. Principal Entity (PE): Verified business identity registered with TRAI.
2. Headers (Sender IDs): 6-character sender codes approved for explicit use-cases.
3. Content Templates: Exact text templates registered with {#var#} replacement variables for dynamic passcodes.

## Frequently Asked Questions • Telecom Regulations & A2P 10DLC

What happens if message copy deviates from the DLT template?

The Indian carrier's telecom gateway rejects the message instantly with failure code 'Template Mismatch' before it ever reaches the handset.

## Related Technical Articles & Deep Dives

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[Telecom Regulations & A2P 10DLC
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[OTP & 2FA Engineering
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