A California partition action happens when one co-owner of real property wants to sell but other co-owners do not want to sell their ownership rights. A partition action enables you to force the sale of property when coowners are refusing to sell.A partition action is a lawsuit that forces the sale or division of jointly owned real property. A partition action is a legal procedure used to divide or sell jointly owned property when co-owners can't agree on its use or disposition. A Partition Action is a type of lawsuit a coowner would bring against another one or two owners if they cannot agree on how to dispose of the property. An action to partition settles any differing interests that arise between interested parties.