Under certain conditions they have the right to do so. One condition would be if they (parents) have co-signed any loan arrangement that you have entered into.. Ie You need help to get a car loan and they sign with you to guarrantee it.
If your parents or parent are co-applicants or co-account holders of a credit card, but not an authorized user.
Your name is the same as your fathers..
Remember these guys are paid by the collection.. If they can rattle or disturb anyone close to you and lay an emotional trip on them to influence you to pay your bill or make an inappropriate decision THEY WILL>
Have a look into a Debt Management / Credit counselling specialist to help out. We can assist further at Bankruptcy-America.com