---
title: Why do I get a DND error when sending Transactional or OTP messages?
description: "Occasionally, you might encounter a **DND** (Do Not Disturb) error even when sending purely Transactional or OTP messages. This can happen if the message content is approved under the ***[Service Explicit](https://www.smsgatewaycenter.com/service-explicit-sms/)*** or***[Promotional SMS](https://www.smsgatewaycenter.com/promotional-sms/)*** category on the respective **DLT** (Distributed Ledger…"
url: "https://www.smsgatewaycenter.com/blog/kb/why-do-i-get-a-dnd-error-when-sending-transactional-or-otp-messages/"
updated: "2025-03-05"
category: Bulk SMS
---

# Why do I get a DND error when sending Transactional or OTP messages?

Occasionally, you might encounter a **DND** (Do Not Disturb) error even when sending purely Transactional or OTP messages. This can happen if the message content is approved under the ***[Service Explicit](https://www.smsgatewaycenter.com/service-explicit-sms/)*** or***[Promotional SMS](https://www.smsgatewaycenter.com/promotional-sms/)*** category on the respective **DLT** (Distributed Ledger Technology) platform. Messages in these categories **are not delivered** to numbers **registered** under **DND**, as per TRAI (Telecom Regulatory Authority of India) guidelines.

To resolve this issue, ensure that your **Transactional or OTP content** is **approved** under the ***[Service Implicit](https://www.smsgatewaycenter.com/service-implicit-sms/)*** or *Inferred* category on the **DLT platform**. This category allows delivery to DND-enabled numbers for legitimate transactional purposes. For further assistance, please review your **[DLT settings](https://www.smsgatewaycenter.com/dlt-sms/)** or contact our support team.

***Note:*** TRAI permits individuals to **activate DND** on their mobile numbers to restrict unwanted messages.

### More Related Articles

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- [What are the different SMS sending methods on SMSGatewayCenter?](https://www.smsgatewaycenter.com/blog/kb/what-are-the-different-sms-sending-methods-on-smsgatewaycenter/)
- [What are the advantages of using BulkSMS services?](https://www.smsgatewaycenter.com/blog/kb/what-are-the-advantages-of-using-bulksms-services/)

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