ZOIKS ! I would report that right away. How often do you check your credit report? If not often then who knows how long its been there. They will look at the time frame from when it went into collections and the time you called to report it then try to blame you for not paying your bill. If that happens then contact the Better Business Bureu or the Federal Trade Commision and tell them whats up they should issue you a file # and they report direct to the FBI ect. I put every piece of paper with any of my info on it ect through a shredder ( $25.00 ). Did you live in Vegas? If so that is where my problems started. Vegas is the capital of identity theft. Unfortunently I still live there. Good luck man..
Sean
Sean