Editor's note: This story has been updated to include comments from the American Land Title Association, Fannie Mae, Freddie Mac, and the Federal Housing Finance Agency.The "robo-signing" controversy over lenders' allegedly lax foreclosure procedures is picking up momentum, with the Office of Comptroller of the Currency ordering the nation's largest lenders to review their foreclosure processes.The OCC has directed Bank of America, J.P. Morgan Chase, Citibank, HSBC, PNC Bank, U.S. Bank, Wells Fargo and GMAC Mortgage to make sure they are following proper procedures and that no harm has been done in the past, the Washington Post reported, citing an OCC spokesman.In testimony before members of the Senate Banking Committee Thursday, OCC Acting Director John Walsh said some lenders c...