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

# Message opt-out

> Understand how contacts can opt out of text messages and manage subscription preferences

## Overview

Quo, formerly OpenPhone, provides automatic opt-out functionality to comply with anti-spam legislation and industry standards. Recipients can easily unsubscribe from text messages using standard keywords, and the system automatically prevents future messages while allowing opt-back-in options.

## How opt-out works

### Standard opt-out keywords

Recipients can stop receiving messages by replying with any of these single-word responses:

* **STOP**
* **STOPALL**
* **UNSUBSCRIBE**
* **CANCEL**
* **END**
* **QUIT**

<Note>
  Only single-word messages trigger the opt-out. Messages like "STOP PLEASE" or "PLEASE CANCEL" will not activate the unsubscribe process.
</Note>

### Automatic confirmation

When someone uses an opt-out keyword, Quo automatically sends this confirmation message:

> "You have successfully been unsubscribed. You will not receive any more messages from this number. Reply START to resubscribe."

### Account-wide blocking

**Important:** The opt-out applies to all Quo numbers associated with your account, not just the specific number they replied to.

## What happens after opt-out

### Message delivery prevention

Once someone opts out:

* All future message attempts to that contact will fail
* You'll see a "Failed" status in Quo for attempted messages
* The block remains in effect until they manually opt back in

<Frame>
  <img src="https://mintcdn.com/resource-center/8lhuScSltRbkg8Kf/images/core-concepts-messaging/how-your-contacts-can-opt-out_what-an-attempted-sent-text-me_9fbb2e45.png?fit=max&auto=format&n=8lhuScSltRbkg8Kf&q=85&s=9dba52b0b288ee6fdb39482991bc210c" alt="Failed message status when contact has opted out" style={{ maxHeight: '450px' }} width="1550" height="1408" data-path="images/core-concepts-messaging/how-your-contacts-can-opt-out_what-an-attempted-sent-text-me_9fbb2e45.png" />
</Frame>

### Identifying opted-out contacts

**Signs a contact has opted out:**

* Messages consistently show "Failed" delivery status
* No response to recent messages
* Previous successful message history suddenly stops

## Opt-back-in process

### How contacts can resubscribe

Recipients can opt back into messages by texting either keyword:

* **START**
* **UNSTOP**

### Resubscription confirmation

When someone opts back in, they automatically receive this message:

> "You have successfully been re-subscribed to messages from this number. Reply HELP for help. Reply STOP to unsubscribe. Msg\&Data Rates May Apply."

### Restored messaging access

**After opt-back-in:**

* All Quo numbers in your account can message the contact again
* Normal message delivery resumes immediately
* Previous conversation history remains intact

## Compliance considerations

### Legal requirements

<Warning>
  While Quo handles automatic opt-out processing, you should consult legal counsel to ensure your text messaging practices comply with all applicable laws and regulations.
</Warning>

### Best practices for compliance

**Include opt-out instructions:**

* Add "Reply STOP to unsubscribe" in initial messages
* Clearly communicate how recipients can opt out
* Honor opt-out requests immediately

**Record keeping:**

* Document when contacts opt out
* Maintain records of consent and opt-out history
* Track resubscription events

### Industry standards

**CTIA compliance:**

* Automatic keyword processing meets industry standards
* Single-word trigger requirements follow best practices
* Confirmation messages include required elements

## FAQs

<AccordionGroup>
  <Accordion title="Contact says they didn't opt out but messages are failing">
    Check if they accidentally sent a single-word message matching opt-out keywords (STOP, END, etc.). They can text START to resubscribe.
  </Accordion>

  <Accordion title="Opt-out confirmation not sent automatically">
    Quo's system should automatically send confirmations. If this fails, contact support to investigate the issue with automatic message processing.
  </Accordion>

  <Accordion title="Contact opted back in but messages still failing">
    Allow a few minutes for system processing. If messages continue failing after opt-back-in, there may be other delivery issues to investigate.
  </Accordion>

  <Accordion title="How to see which contacts have opted out?">
    Quo doesn't provide a master opt-out list. Monitor individual conversation threads for failed message status to identify opted-out contacts.
  </Accordion>

  <Accordion title="Can I manually remove someone from opt-out list?">
    No, contacts must opt back in themselves using START or UNSTOP keywords. This ensures compliance with anti-spam regulations.
  </Accordion>

  <Accordion title="Opt-out affecting wrong contact">
    If multiple contacts share a phone number (business lines), the opt-out applies to that number for your entire account. This is normal system behavior.
  </Accordion>
</AccordionGroup>

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