U.S. banking regulators are close to finalizing new national guidelines that will impact mortgage servicing shops after an interagency investigation revealed "significant weaknesses in mortgage servicing related to foreclosure oversight and operations," said John Walsh, the Acting Comptroller of the Currency, in prepared statements to be delivered before a Senate Banking panel Thursday. Walsh said the OCC partnered with the Office of Thrift Supervision, the Federal Deposit Insurance Corp. and the Federal Reserve to investigate foreclosure practices at 14 federally regulated loan servicing shops, including Bank of America Corp. (BAC), Wells Fargo & Co. (WFC), Citigroup Inc. (C), and GMAC LLC. (GMA). "In general, the examinations found critical deficiencies and shortcomings in foreclosure governance processes, foreclosure document preparation processes, and oversight and monitoring of third-party law firms and vendors," Walsh said. "These deficiencies have resulted in violations of state and local foreclosure laws, regulations, or rules and have had an adverse affect on the functioning of the mortgage markets and the U.S. economy as a whole." Walsh said even though the process of outlining new guidelines for servicers is at its early stage, regulators intend to address some of the pressing issues they discovered while investigating the servicing process -- namely a lack of national standards for the foreclosure process and borrower confusion over whom to contact in foreclosure cases due to uncertain protocols. Walsh's report on the investigation of loan servicing firms comes on the heels of a major announcement from the Mortgage Electronic Registration System, or MERS. MERS, which is an electronic registry of mortgage records, informed members late Wednesday that they are now prohibited from foreclosing on residential loans using the MERS name. MERS has long been the target of foreclosure defense attorneys and consumer advocates for creating a foreclosure process that fails to create transparent oversight and protocols. Walsh said as part of their comprehensive examination of servicing shops, regulators examined Lender Processing Services Inc. (LPS), MERSCORP, the parent company of MERS, and MERS itself. After reviewing the servicing shops and examining bank self assessments, as well as 2,800 foreclosure cases, Walsh said investigators concluded that there were "significant weaknesses in mortgage servicing related to foreclosure oversight and operations." He said regulators have yet to finalize their proposed guidelines, but that will be the next step in the process. Write to Kerri Panchuk.