The court has placed the most commonly used forms on line as a resource. Please be advised that the forms detailed below are intended to be a guide.Partition Addendum (840P) A fill-in-the-blanks RJI Partition Addendum. Uncontested Matrimonial RJI (UD-13) A fill-in-the-blanks Uncontested Matrimonial RJI. Note, there are no preprinted forms for a separation agreement. Have a question about a partition action? Not sure how to proceed when you've received a partition action? A partition action is a legal mechanism commonly used when two or more coowners of a property cannot agree on what to do with the property. A partition action forces the sale of jointly owned real estate. Many people opt for a simple approach to dividing their assets when making their estate plans.