A partition action is a legal remedy used when coowners of a property cannot come to an agreement on how to divide or manage the property. Our lawyers are uniquely capable of assisting with partition actions.These complicated matters frequently involve intersections of estate and real estate laws. The foremost thing that you need to do is prove that the property is joint and ancestral. Filing a partition complaint: The party seeking partition files a complaint in the Supreme Court of the county where the property is located.