# 30709: Subscribers Must Be Opted In When Providing an Opt-In Message

Log Type: APPLICATION

Log Level: ERROR

## Description

When registering an A2P 10DLC campaign, an opt-in message is required if the campaign involves subscriber opt-in. If an opt-in message is provided, the campaign must ensure that subscribers are properly opted in before messages are sent.

### Possible causes

* An opt-in message was provided, but there is no clear opt-in process for subscribers.
* The campaign setup does not align with opt-in policies.

### Possible solutions

* Ensure that subscribers explicitly opt in before receiving messages.
* Provide an accurate opt-in process that aligns with compliance guidelines.
* Review Twilio's A2P 10DLC opt-in compliance requirements.