The Federal Housing Finance Agency incorrectly piggybacked and failed to independently verify Fannie Maes and Freddie Macs mandated assurances or covenants that the GSEs were in compliance with the Treasury Departments terms in exchange for taxpayer support during conservatorship, according to a recent report by the FHFAs official watchdog. The FHFAs Office of Inspector General noted a gap in the Finance Agencys compliance with the terms of the preferred stock purchase agreement with the Treasury.Until June 2012, FHFA did not provide Treasury with a certification that the enterprises filings and related documents were free of materially false or misleading statements, said the OIG report, issued in August.