Received call on my cellphone stating that either I needed to contact them or have my retained attorney contact them with 24 hours.  I called back and gave the case number they left on my voicemail.  They are looking for someone else, but I was a reference for this person when they applied for credit many years ago.  They did ask me to provide the party they are looking for with the details of the call and I told them I would not because I was no longer in contact with the person.  The lady on the other end said thank you and ended the call.  I have no information on whether this is a scam or legitimate attempt to collect a debt, but did not even give my name to be safe.  Hope this helps, even if a little bit.