Effective January 1, 2011, California first trust deed mortgage holders who consent to a short sale of residential property (up to 4 units) are prohibited from seeking a deficiency judgment for the difference between the mortgage balance and proceeds realized through the sale. 

Senate Bill931 was passed by legistature in August and approved by the Governor on 9/30/10 to help strapped homeowners.

See the complete article at Realty Times