I have been receiving multiple calls from several numbers claiming to be from Concord Resolutions. They say they will not give me any information until I verify my SSN with them. I asked for the debt information and their address. They told me New York State and then when I asked again that they were in XXXX but refused to give any further information. When I requested that I get validation of the debt prior to speaking with them further he hung up on me. Calls from XXXX. I know what debts I owe and this is not a valid debt.