Portfolio Recovery calls XXXX of times per month from unique phone numbers attempting to collect a debt. They refuse to provide proof of debt or divulge any information about the origin of the debt. There is also XXXX record of any potential debt on any of the XXXX credit agencies. This " debt collector '' is a scammer attempting to collect debt that is either so outdated that it is past any statue of limitations, or not actually the person that they 're attempting to collect from. 

I am an extremely detailed watcher of my credit reports, so I am 100 % confident this is not a valid debt whatsoever.