In Arizona, when two or more people own property together and disagree about its use, one or more of them can file a partition action. The first step in a partition action after filing the lawsuit is the court appointment of a neutral third-party to sell the real property.Partition actions can force the sale of a property over co-owners' objections. I am a part of a partition in Phoenix Arizona for a house my Ex and I own. We are both on the deed and she is the only one on the mortgage. If there is no immediate agreement on dividing the sale proceeds, the parties should mediate with a mediator (e.g. Arizona law provides a process in which an owner of property can request a division or sale of the property. This process is called a partition action.