Attorney General Andrew M. Cuomo is demanding information from dozens of debt collection law firms throughout the state as part of a civil lawsuit to overturn more than 100,000 faulty default judgments, he announced yesterday.

The suit, Pfau v. Forster & Garbus , 2009-8236, was filed in state Supreme Court in Erie County on behalf of Chief Administrative Judge Ann Pfau. It asks Justice Timothy J. Drury ( See Profile) to vacate all default judgments where the sole evidence that a defendant received service notifying him that he was being sued was an affidavit from American Legal Process of Lynbrook, N.Y. ( See the complaint.)