Received an unblocked phone call and as left on my voicemail in regards to my son - they stated he had a warrant out for his XXXX. they need to process serve him in regards to a court summons in XXXX county and left a phone # XXXX XXXX XXXX with a case # XXXX - I called back, told them I was his mother and they left a voicemail for my son. I asked who they worked for and what was this about. and they refused to tellme who they work for. all I got out of them they were working a FRAUD case that there was a credit card taken out in my son 's name. I told him I will have him file apolice report because he barely turned XXXX they hung up on me. I called them back, he then accused me of opening a credit card in my son 's name, I asked for the original information and he refused. then he insulted meand called me names. I told him not to call my number again. - I asked for his manager another man came on phone and he refused his name or who he worked for.