Prenuptial and postnuptial agreements can prevent you from having to sell certain assets with your spouse. For instance, if you have a family property, a marital agreement can prevent you from having to sell it in the event of a divorce. If you own all or part of a business, you could lose half of your stake in it to your spouse if the marriage terminates.
Conversely, if your spouse or spouse-to-be has significant debt, it may attach to you in the absence of a legally binding marital agreement.