Goldman Sachs (GS) is facing another lawsuit over claims it misrepresented or omitted important details about the quality of mortgages the investment bank bundled and sold to investors. The latest case was filed by CIFG Assurance North America Inc., a New York-based insurer selected by Goldman to insure $275 million worth of securities tied to Goldman's securitization of 6,204 residential mortgage loans. CIFG also named M&T Bank, the originator who issued most of the loans, a defendant in the case. The actual securitization transaction occurred in 2007. CIFG accuses Goldman in the suit of failing "to disclose that the securitization (of mortgage loans) constituted an integral part of an orchestrated corporate policy to offload billions of dollars in toxic exposure to mortgage-related assets, thereby duping investors and insurers such as CIFG to take on Goldman's enormous market risk." Goldman Sachs was not immediately available for comment. Goldman was sued by Allstate Insurance (ALL) earlier this month in another RMBS case. In that case, the insurance giant accused Goldman of selling it $123 million in toxic mortgage-backed securities without representing the toxic quality of the underlying mortgages. Write to: Kerri Panchuk.