# 21727: Campaign registration failed due to missing parameter(s)

Log Type: APPLICATION

Log Level: ERROR

## Description

We could not register your US A2P Campaign because one or more required parameter(s) are missing

### Possible causes

One or more required parameters are missing for Campaign registration

### Possible solutions

Please include all required parameters and retry Campaign registration. Please check out our [support article](https://support.twilio.com/hc/en-us/articles/8959909733403-Changes-to-the-A2P-10DLC-Campaign-Creation-Process) to understand which fields are required for campaign registration.