They have contacted everyone associated with an individual I am associated with asking if I know this person. Will not give any details. Have also contacted the individual directly.Callahan & Associates is a Credit Union company that does Credit union research, analytics, software, networking, and consulting solutions. They ARE NOT a debt collector. They are using a name that is familiar to myself as I work in Credit Unions.When another associated person contacted them they asked for phone # and SS#. Big tip off that this is a scam.