Unfortunately, as the Registered Keeper, you are liable for Parking Penalties under Traffic Management Act 2004 for Council issued tickets or Protection of Freedoms Act 2012 for Private Land.
As you can no doubt imagine, there are different ways of dealing with them depending on who issued them.
Was it Council issued or a Private Company? Did you get a ticket stuck to your windscreen or did it arrive through the post?
Wether or not they "sustained no loss" is irrelevant.