Even in countries that have not adopted UPAA/UPMAA such as New York, properly executed marriage contracts have the same presumption of legality as any other treaty.  It is not necessary for a couple who signs a marriage pact to keep separate lawyers to represent him as long as each party understands the agreement and signs it voluntarily with the intention of being bound by its terms. There is a strong public policy that favours parties that control and decide their own interests through contracts.  There are no state or federal laws requiring adults with contractual capacity to hire a lawyer in order to enter into a marriage contract such as a marriage contract, with the exception of a California law that requires the parties to be represented by a lawyer if spousal assistance (support) is limited by the agreement.  The marriage agreement may be challenged if it is proven that the contract was signed under duress.  Whether a pre-marriage contract was signed under duress must be justified by the facts and circumstances of this case. For example, it was found that a spouse`s assertion that she believed there would be no marriage if it was not a marriage, where the marriage was only two weeks away and marriage plans had been made, was not sufficient to demonstrate coercion.  Contracting parties may waive disclosure beyond what is expected and there is no certification requirement, but it is good practice. There are special requirements when the parties sign the agreement without a lawyer, and the parties must have an independent lawyer when they limit spousal assistance (also known as simony or spousal support in other states). Parties must wait seven days after the pre-marital contract has been submitted for review for the first time before signing it, but it does not need to happen a number of days before the marriage.  Prenups often take months to negotiate, so they should not be abandoned until the last minute (as people often do). If the pre-scheme requires a lump sum payment at the time of divorce, it can be assumed that it favours divorce.