A postnuptial agreement is a legal contract created by a married couple after they have tied the knot. This document outlines how assets and debts will be divided in the event of a divorce or separation. It can also address issues like spousal support and property rights, providing clarity and security for both partners. Unlike a prenuptial agreement, which is established before marriage, a postnuptial agreement allows couples to reassess their financial situation and expectations after they are married. These agreements can be particularly useful if circumstances change, such as a significant increase in income or the acquisition of new assets.