High Quality Content by WIKIPEDIA articles! A postnuptial agreement is a written contract executed after a couple gets married, or have entered a civil union, to settle the couple`s affairs and assets in the event of a separation or divorce. It is normally "notarized" or acknowledged, and is usually the subject of statute of frauds. Like the contents of a prenuptial agreement, it can vary widely, but commonly includes provisions for division of property and spousal support in the event of divorce, death of one of the spouses, or breakup of marriage. In rare cases, a "prenup" may be enforceable even without a marriage, such as with a Domestic partnership or Registered partnership.