New user template

Hi,
When a new user is created the notification is signed by the user who created the new one. The notification is created by this template new user template
Basically, if I’m not the administrator the notification will be signed by me but I want it to be anonymous. If I go to email templates, this one is not there. I don’t have access to the backend since the service is through a third party provider.

Is there any way to modify this?