A post-nuptial agreement allows married couples to define how their finances and assets will be divided if they divorce. While not strictly binding, courts are increasingly considering post-nuptial agreements when deciding divorce settlements, especially if both parties agreed to the terms recently and understood them fully. Post-nuptial agreements can address issues like property, pensions, debts, maintenance, and child arrangements. However, they cannot override the interests of any children, so the agreement may need updating if children are born after it is signed.