# 21910: Invalid 'From' and 'To' pair. 'From' and 'To' should be of the same channel

Log Type: APPLICATION

Log Level: ERROR

## Description

`From` and `To` parameters in the API Request should be of the same channel.

### Possible causes

You are trying to send a message between different channels, eg. from an SMS capable number to a WhatsApp number.

### Possible solutions

Ensure `From` and `To` parameters are the same channel, eg. both are SMS or both are WhatsApp.