# 30844: Verification rejection - Double opt-in required for this use case

Log Type: APPLICATION

Log Level: ERROR

## Description

The verification submission has been reviewed and it was rejected. Messaging traffic on this phone number is blocked until it's verified.

Verification is one component of ensuring A2P SMS is used by businesses in a legal and compliant manner. The review process looks at the business sending messaging (not the software powering it), the use case, sample content, the web presence, the opt-in/consent collected and associated website terms and privacy policies.

### Possible causes

Your messaging use case requires a double opt-in process, but:

* Only a single opt-in was provided
* The double opt-in process wasn't documented
* The confirmation step was missing or incomplete

Double opt-in is required for certain use cases including shopping cart reminders.

### Possible solutions

* Implement a double opt-in process for your specific use case
* Ensure the process includes:
  1. Initial opt-in (web form, keyword, etc.)
  2. Confirmation message asking user to confirm subscription
  3. User's affirmative response to complete enrollment
* Document the complete double opt-in flow in your submission.
* Provide example messages for both steps of the double opt-in process.