> ## 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.

# US compliance FAQs

> Frequently asked questions about SMS/MMS compliance in the United States.

# US compliance FAQs

Frequently asked questions about SMS/MMS compliance in the United States.

## General compliance

### What is TCPA?

The Telephone Consumer Protection Act (TCPA) is a federal law that regulates telemarketing calls, automated calls, and text messages. It requires express written consent before sending SMS/MMS messages.

### Do I need consent before sending messages?

Yes, you must obtain express written consent before sending SMS/MMS messages to customers. Consent must be clear, unambiguous, and can be revoked at any time.

### What is express written consent?

Express written consent means the recipient has clearly agreed to receive messages from you. This can be through:

* Checkbox on a form
* Written agreement
* Text message opt-in
* Electronic signature

## Opt-out requirements

### How quickly must I process opt-outs?

Opt-out requests must be processed immediately. You should stop sending messages to opted-out numbers within a reasonable time (typically within 24 hours).

### What keywords should I support for opt-out?

Support common opt-out keywords:

* STOP
* STOPALL
* UNSUBSCRIBE
* END
* QUIT

### Do I need to confirm opt-outs?

Yes, it's a best practice to send a confirmation message when someone opts out, confirming they will no longer receive messages.

## Do Not Call Registry

### Do I need to check the Do Not Call Registry?

If you're making telemarketing calls, you must check the National Do Not Call Registry. For SMS/MMS, this depends on the nature of your messages.

### How often should I check the Do Not Call Registry?

Check the registry every 31 days if you're making telemarketing calls. Maintain your own internal Do Not Call list as well.

## Time restrictions

### When can I send messages?

Messages should not be sent before 8 AM or after 9 PM in the recipient's local time zone. Always respect time zones.

### Are there exceptions to time restrictions?

Emergency messages and certain types of informational messages may have different rules. Check regulations for specific exceptions.

## State laws

### Do state laws apply in addition to federal laws?

Yes, many states have their own messaging and privacy laws. You must comply with both federal and state laws where applicable.

### Which states have additional requirements?

States like California, Florida, New York, and Texas have specific requirements. Consult with legal counsel for your specific situation.

## Consent forms

### What should be included in consent forms?

Consent forms should include:

* Clear explanation of what types of messages will be sent
* Message frequency
* How to opt-out
* Business contact information
* Privacy policy link

**See also:**

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