You can have a “Warning” message at the bottom of the Relay Point selection map :

Warning carte choix point relais
Warning message on the relay point selection map

This means that the plugin uses the Mondial Relay – InPost test account, as shown on the next page of the documentation. :

To switch to production mode, you need to configure the “Account” tab of the plugin with your own Mondial Relay – InPost identifiers, as indicated in the dedicated page of the documentation.: