Car hire and administrative fees

I am convinced that administrative fees sum up to 80% of car hire companies' benefits. They will charge your credit card without prior notice, send you an e-mail informing about the fine and wash their hands. 

Is there anything we can do? Nothing, but paying for the fine. 

It is not clear why such a fee should be charged, given the fact that identifying the driver is their legal duty to do so! They are charging you and me for something they are obliged to.