---
title: "SMS Content Guidelines"
slug: "sms-content-guidelines"
description: "Review Insider One’s SMS content guidelines to ensure compliance and best practices for message copy, formatting, allowed content, and user consent requirements."
tags: ["message content", "sms content guidelines"]
updated: 2026-01-05T13:41:45Z
published: 2026-01-05T13:41:45Z
canonical: "academy.insiderone.com/sms-content-guidelines"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://academy.insiderone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SMS Content Guidelines

Many SMS-related laws and regulations are applied in various countries. One of them, for instance, specifies that you can’t send SMS messages during so-called "white hours." For example, in some countries, it is not possible to send a text message between 10 pm and 8 am. To prevent this from happening, you can enable the [Silent Hour](/docs/sms-silent-hours) feature or schedule it to be sent at a later time.

[Opt-out](/v1/docs/unsubscription-methods-for-sms) and [opt-in](/v1/docs/subscriber-collection-for-sms-campaigns) processes are important in the SMS world, and authorized institutions perform ongoing audits. Ensure you comply with [the rules and regulations of the country](/v1/docs/sms-country-guidelines) to which you send your SMS.

Please keep in mind that SMS message content can’t have any of the following characteristics:

- It cannot violate any law or regulation.
- It cannot be deliberately deceiving.
- It must not contain sexually explicit or pornographic content.
- In some regions, special regulations apply to commercial gambling-related content.
- In some cases, pre-registration of the sender ID (‘From’) is required.
- For some destinations, the entire content template needs to be pre-approved by the authorities.

## Related

- [Single SMS Message](/create-a-single-sms-message.md)
- [Cart Reminder SMS](/create-a-cart-reminder-sms.md)