How do I raise a Response Forbidden in django

Return it from the view as you would any other response.

from django.http import HttpResponseForbidden

return HttpResponseForbidden()

if you want to raise an exception you can use:

from django.core.exceptions import PermissionDenied

def your_view(...):
    raise PermissionDenied()

It is documented here :

https://docs.djangoproject.com/en/stable/ref/views/#the-403-http-forbidden-view

As opposed to returing HttpResponseForbidden, raising PermissionDenied causes the error to be rendered using the 403.html template, or you can use middleware to show a custom "Forbidden" view.