To complete the third element, each party must provide a detailed list of its assets, debts, income and future gifts. In order to discharge the fourth element and ensure that the matrimonial agreement is fair and appropriate, each party should review the provisions of the marriage agreement with its respective lawyers. It is more likely that a court will find that a marriage agreement is applicable if each party is represented by a lawyer and both lawyers have the marriage agreement reviewed before signing. A lawyer representing both parties is a potential conflict of interest and should be avoided. There are several ways to attack a marital agreement in court. These include lack of volunteerism, lack of scruples and lack of disclosure of assets.  In all U.S. states, it is not permissible to address issues relating to children of marriage, particularly custody and access issues.  The reason is that children`s issues must be decided in the best interests of children.  However, this is controversial: some people think that, as custody disputes are often the worst part of a divorce, couples should be able to settle this in advance.  In several European countries such as France, Belgium, the Netherlands, Germany, Poland, Switzerland, Sweden, Denmark, Norway and Finland, marital agreements have long been considered valid.
While in some of these countries, limits apply to restrictions enforceable or valid by the courts (for example. B Germany after 2001, when the appelncies courts indicated it), a written and duly initiated contract, which was freely concluded, cannot be challenged, for example by arguing the circumstances in which the marriage broke down or where the marriage reigned. In France and Belgium (as in Quebec, which has the same judicial tradition), marital agreements must be concluded in the presence of a notary. For example, the California Family Code Section 1612 (c) provides that the absence of sp assistance absolutely requires that the party who waives the right be represented by an independent lawyer at the time of the contract. Therefore, if a lawyer has not advised the party and signed the marriage agreement (the independent legal advice certificate is completed), the waiver is not enforceable. Custody of the children cannot be requested in advance, as the best interests of the child must always govern custody decisions and these cannot be pre-predicted before marriage. For similar reasons, access rights and parental rights and responsible rights cannot be contractually agreed. Childcare cannot be abandoned because child care benefits the children in the first place and therefore does not belong to the spouse.
Alimony cannot be isolated because it may be necessary for the spouse to live a minimum lifestyle. Non-financial matters go beyond marital agreements.