You have to pay them or they will result in a warrant or license suspension or something. They do not go away just because you do not pay them. That would just encourage people to not pay them.
My standard disclaimer: I am not offering legal advice, assume I do not know the law in your state and that I am just making suggestions for starting points for when you do speak with an attorney. Do NOT rely on anything I write and contact a lawyer in your area immediately after reading my posting.