---
page_type: error
code: 23002
message: >-
  23002: Message Redaction Incompatible Configuration: Short code "STOP"
  filtering
level: WARNING
product: Programmable SMS
---

## Description

Phone Number Redaction is enabled for your account. Twilio's default opt-out keyword handling ("SMS STOP filtering") is not compatible with Phone Number Redaction and should be disabled.

### Possible Causes

- Twilio is currently set to handle opt-out keywords for short code numbers on your account. Twilio's opt-out handling requires Twilio to save non-redacted phone numbers of users who have opted out, and is incompatible with Phone Number Redaction.

### Possible Solutions

- To resolve this issue, your application needs to be able to handle [opt-out keyword messages](https://support.twilio.com/hc/en-us/articles/223134027-Twilio-support-for-opt-out-keywords-SMS-STOP-filtering-) from end users.
- Users who reply STOP, STOPALL, UNSUBSCRIBE, CANCEL, END, or QUIT should be added to a blocklist in your application to ensure you do not send them any further messages, unless they opt-in again.
- Users who reply HELP or INFO should be sent an informational message about your application or service.
- Users who reply START, YES, or UNSTOP should be removed from your "STOP" blocklist so they can receive messages from you again.
- Once you are ready to disable Twilio's built-in opt-out handling and process the above keywords in your own application, please reach out to Twilio Support through the [Console](https://console.twilio.com) or [Help Center](https://support.twilio.com) to disable Twilio's built-in opt-out keyword handling for your account.