HUD just issued a report that might have far reaching implications.

The audits accuse the five major lenders of violating the False Claims Act, a Civil War-era law crafted as a weapon against firms that swindle the government. The audits were completed between February and March, the sources said. The internal watchdog office at HUD referred its findings to the Department of Justice, which must now decide whether to file charges.

The federal audits mark the latest fallout from the national foreclosure crisis that followed the end of a long-running housing bubble. Amid reports last year that many large lenders improperly accelerated foreclosure proceedings by failing to amass required paperwork, the federal agencies launched their own probes.

The resulting reports read like veritable indictments of major lenders, the sources said. State officials are now wielding the documents as leverage in their ongoing talks with mortgage companies aimed at forcing the firms to agree to pay fines to resolve allegations of routine violations in their handling of foreclosures.

The audits conclude that the banks effectively cheated taxpayers by presenting the Federal Housing Administration with false claims: They filed for federal reimbursement on foreclosed homes that sold for less than the outstanding loan balance using defective and faulty documents.