Its the owners car. Either they say who was responsible for that ticket or the owner is getting fined themselves.
And to be fair, these tickets are delivered by post. Only if you then didnt pay or show up to a hearing will you get into more serious trouble.
Assuming the courts work (much better than police either way), you get a fair process there. (of course, circumstances can be fabricated, but thats then up to the court, not much you can do really apart from forcing them to have video evidence in such easy things)