A: Most don’t, but prenuptial agreements are common in second or third marriages. A prenuptial agreement specifies who gets what in terms of assets and spousal support in the event of divorce. Prenups can protect your separate property, support your estate plan, reduce conflicts and save money in the event of a divorce. For a prenuptial agreement to hold up in court, it must be in writing, entered voluntarily, offer full disclosure at the time of execution, cannot be extremely unjust, and must be signed by both parties in front of a notary public. For more, read: Prenuptial Agreement: Five Required Elements.