California Code, Code of Civil Procedure - CCP § 1046a

In all cases brought under the provisions of any act providing for the establishment and quieting of title to real property in cases where the public records in the office of the county recorder have been, or shall hereafter be, lost or destroyed, in whole or in any material part by flood, fire or earthquake, all papers filed under order of court nunc pro tunc as of the date when they should have been filed, shall have the same force and effect as if filed on the date when they should have been filed.