The person who received the parking ticket is responsible to pay the fine. If it gets to the point where bailiffs are involved, then they are only allowed to take things that the debtor owns. They cannot for example break into your house and seize the TV in your living room if it doesn't belong to you. Sometimes it happens though but you can get it back if you can prove that you don't own it, for instance you can show that the receipt is in somebody's else name. The same applies to the car parked on your drive - if you are not the legal owner, bailifss are not allowed to take it and if they do, you can sue them for doing so.
