This is scam. They have been calling me for months on my cell and at work. They are trying to scare you with legal action to get money from you, but the legal action they claim is illegal and will not happen. The sheriff is not going to show up at your home or work to arrest you. No law enforcement is going to get involved in any debt collecting. I just tell them they need to send me proof and they eventually hang up on me! haha, don't give them any information!!