Debts are not discharged on an "address" basis but on individuals or corporation. This collection agency might have taken this address from your credit report or some other search. Like the other counsel suggested you should ask for validation. Also, possibly it may be a violation of the Bankruptcy discharge and you should contact either your old bk attorney or someone knowledgeable attorney in this regard. It is definitely a legal violation. Oh yeas, one more thing: Pull out your latest credit report and see if it is still there. Once you see it, you can ask the creditor listed on the report to send you verification.
Only see a licensed attorney before you make any decision. This answer may not be perfect in any given situation. However, more fact may be required by your local attorney. If you are in Las Vegas, you are welcome to send your questions regarding Chapter 7, or 13 to Attorney Malik Ahmad at Malik@lasvegaslawgroup.com or www.fastbankruptcynevada.com or by calling (702) 270-9100. In many cases, we do not charge initial consultation fee.