As explained in this National Law Journal article by Zoe Tillman,
In the latest constitutional challenge against the Consumer Financial Protection Bureau, the agency was accused today of overstepping its authority by attempting to regulate the practice of law and collect personal financial data. A complaint filed in the U.S. District Court for the District of Columbia accused the agency of trying to force a company that provides support services to lawyers to turn over confidential personal financial information. The plaintiffs also claimed the bureau was weighing enforcement actions over fee arrangements in bankruptcy matters that would "usurp" the authority of state bar associations. More broadly, the lawsuit included claims that the bureau's structure was unconstitutional because it operated too far outside the oversight of the executive, legislative and judicial branches. Previous challenges to the bureau focused on President Barack Obama's recess appointment of bureau director Richard Cordray, but the Senate confirmed his appointment last week.