ID thieves and bill collectors buy and sell your information. Cheer up; it costs them money every time they give up and have to sell. Thieves want you to call them back in order to collect more information to sell to others if they can't con you. Don't ever give out or "confirm" ANY information over the telephone, including your name; it's the safest way to protect yourself. If you call them back, they have your number. If you identify yourself, they have your name, and so on. Do not push any buttons or leave messages. These are common tactics of thieves and bill collectors alike. Beware, these thieves ARE POSTING HERE (800notes) to confuse people.
You can help your entire community by doing what I did. Contact your local TV station and tell them about this website, so that they can share it with their viewers. I have offered good advice here. I encourage everyone to copy it and re-post as you see fit.