The bill, named the Interstate Recognition of Notarizations Act, would require courts to accept document notarizations made out of state. Its sponsors intended the effort to promote interstate commerce. But homeowner advocates warn the new law could allow lenders to cut even more corners as they seek to evict homeowners.

White House press secretary Robert Gibbs said the president did not believe Congress meant to undermine consumer protections regarding foreclosure challenges. Still, Obama will use a “pocket veto,” which will effectively kill the legislation.

Democratic leaders on the Hill were scrambling to figure out how the bill managed to sail through both chambers of Congress without any objection. The episode may prove embarrassing for Democrats who in recent weeks have been calling for federal investigations into flawed paperwork, forged documents and other kinds of misconduct in foreclosure proceedings initiated by big lenders.