def form_valid(self, form):
        if self.request.user.__can_checkout(client=self.client, checkout_class=self.CHECKOUT_CLASS)
            checkout = self.client.pending_extra_staff(
                by=self.request.user,
                state_from=self.client.state,
                state_to=self.STATE_TO,
                checkout_class=self.CHECKOUT_CLASS)
            self.client.save()
        else:
            msg = "RE {client} Can't be checkout 2 times for the same user".format(
                client=self.client)
        if checkout.has_enough_confirmations():
            msg = self.state_to()
        else:
            msg = "RE {client} Pending extra staff to confirm status change".format(
                client=self.client)

        messages.info(self.request, msg)
        return super(BaseActionView, self).form_valid(form)