A new federal law protects innocent tenants from eviction after foreclosure.
The purchaser at foreclosure takes the property subject to any unexpired lease. The law also requires the foreclosure auction purchaser to give notice to vacate to any month-to-month tenant. The notice must be served at least ninety days prior to its effective date.
The law expires at the end of 2012.
 S. 896, Public Law No: 111-22, signed by Pres. Obama May 22, 2009.