Calls any third part about your debt like friends, neighbors, relatives, etc. However they can contact your attorney, a consumer reporting agency, the creditor, the attorney of the creditor, or the attorney of the debt collector.
FDCPA Section 805. (b) $1000.00 (Above courtesy of creditinfocenter).
When the collector called, were they just looking for you or, did they state that you owed money to the third-parties. If they mentioned ANYTHING about you owing a debt they are in violation of the above referenced law.