This is a document through which the parties agree that particular property will be "separate property" and will not be divided. This agreement must take place after the couple is married.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. Fill out this form completely. You MUST include your mailing address. A partition agreement divides, or partitions, a married couple's community estate into two separate estates. Of human rights in the north of Ire- land. A partition agreement.