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 make decisions based on their current circumstances. It can be particularly useful if there are significant changes in income, assets, or family dynamics after marriage.