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

# General US content restrictions

> Learn about content restrictions for SMS/MMS messages in the United States.

# General US content restrictions

Learn about content restrictions for SMS/MMS messages in the United States.

## Prohibited content

The following content is prohibited in SMS/MMS messages:

* **Fraudulent messages**: Deceptive or misleading content
* **Spam**: Unsolicited bulk messages
* **Harassment**: Harassing or threatening content
* **Illegal content**: Content promoting illegal activities

## Restricted content

The following content has restrictions:

* **Adult content**: Restrictions on adult-oriented messages
* **Gambling**: Restrictions on gambling-related content
* **Alcohol**: Restrictions on alcohol-related messaging
* **Tobacco**: Restrictions on tobacco-related content

## Best practices

* **Be honest**: Use truthful, accurate messaging
* **Be relevant**: Send only relevant, expected messages
* **Respect privacy**: Respect customer privacy and preferences
* **Follow regulations**: Comply with all applicable laws

## Content guidelines

### Message format

* Clear sender identification
* Accurate message content
* Appropriate message length
* Professional tone

### Required disclosures

Include in messages:

* Business name or identification
* Contact information
* Opt-out instructions
* Frequency of messages (if applicable)

**See also:**

* [Key US regulations →](/help-and-reference/deliverability-compliance/united-states-sms-mms-compliance/key-us-regulations)
* [US SMS/MMS compliance →](/help-and-reference/deliverability-compliance/united-states-sms-mms-compliance/us-sms-mms-compliance)