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. Lasiter Law Helps Unmarried Clients Divide Property Through Partition Actions.Call the Phoenix Family Lawyers For Consultation. This article will provide you with the knowledge and tools you need to confidently navigate the sale of unsubdivided lands in Arizona. Court Forms and Instructions. Completing the Forms. A partition action can be taken that will allow Arizona courts to assume responsibility for determining the most suitable way of apportioning the estate. This process is a way to change property lines through the recordation of new deeds and can be used in certain circumstances where a Final Plat is not required. A petition to partition usually results in a physical split of the property or the property is sold and the proceeds split among the co tenants. STEP 1: USING BLACK INK ONLY, Fill out the "Civil Cover Sheet.