I am dealing with ACR- Advanced credit recovery,
https://www.acrnf.com/index.html, which is located in upstate NY- 6000 N. Bailey Avenue Suite 1E Amherst, NY 14226 (last location i could find... also listed in Niagra falls, but its always tough with these types! i sent a validation letter to both addresses to be safe).
They are attempting to collect on a PDL that I tried to settle (paid all principal, demanded PIF, PDL ignored and attempted to debit ACH, got it reversed, never heard from them again nor did they respond to BBB).