---
page_type: error
code: 21737
message: "21737: Brand Registration Failure: 2FA Verification Expired"
level: ERROR
product: Programmable Messaging
---

## Description

The two-factor verification window expired before a response was received. A new request is required.

### Possible Causes

The verification link or token expired after the allowed duration without user confirmation.

### Possible Solutions

Submit a new 2FA request using the API or Console and ask the brand contact to complete it within the active time window.