# 63051: WhatsApp Sender or Account is Locked

Log Type: APPLICATION

Log Level: ERROR

## Description

This error appears when Meta restricts either a WhatsApp sender or its associated WhatsApp Business Account (WABA). Meta can apply a restriction for policy violations, security issues, or inactivity. While a sender or WABA is restricted, all messaging traffic and sender-management actions (such as updates or new registrations) are blocked.

### Possible causes

* **30-day inactivity (most common):** Meta locks a sender if it detects no traffic during a rolling 30-day period.
* **Policy or account violations:** The sender or WABA violates one or more of the following:
  * [WhatsApp Business Terms of Service](https://www.whatsapp.com/legal/business-terms)
  * [WhatsApp Business Messaging Policy](https://business.whatsapp.com/policy)
  * [Meta Commerce Policy](https://www.facebook.com/policies_center/commerce)
* **Verification mismatch:** Meta cannot verify the request data (for example, an incorrect two-step verification PIN).

### Possible solutions

* **Inactivity lock**

  * Re-register the sender in the Twilio Console through [Self Sign-up](/docs/whatsapp/self-sign-up) or by using the [Senders API](/docs/whatsapp/api/senders).
  * Prevent future locks by sending at least one message every 30 days. If possible, wait to register the sender until you are ready to send traffic.
* **Policy or account violation**

  1. Attempt to re-register the sender.
  2. If re-registration fails and you believe the restriction is in error, contact [Twilio Support](https://help.twilio.com). Twilio Support can appeal the restriction to Meta on your behalf.
* **Verification mismatch**

  1. Confirm that the two-step verification PIN and any other requested data match the values configured in WhatsApp Manager.
  2. After correcting the data, re-register the sender.