New York Domestic Relations Law § 236 (B)(3) sets forth that prenuptial and postnuptial agreements are valid and enforceable if they are in writing, the parties subscribe to them, and they are proven in the way required to entitle a deed to be recorded. The difference between these types of agreements is that prenuptial agreements are entered into before marriage, while postnuptial agreements are entered into after marriage.
The agreement can include, among other things, provisions for the custody, care, maintenance, and education of the parties’ children, subject to Domestic Relations Law § 240. § 240 provides that the court has the discretion to enter custody and support orders as justice requires, based on the circumstances of the case, the parties, and the child’s best interests.
In other words, prenuptial and postnuptial agreements in New York can’t conclusively establish child custody or child support. Postnuptial agreements, made after a child is born, may be influential when they address education, child support, and care. However, judges make a final determination on child custody and support based on the child’s or children’s best interests. The terms of an agreement are only enforced if the terms serve a child’s best interests and needs at the time of the divorce. A separation agreement, however, which is in proper form, can deal with child custody and child support terms. The difference between a separation agreement and a postnuptial agreement in this context being that either when the separation agreement is made or very soon thereafter the parties must being living apart and intend to do so. Of course custody, parenting time and child support terms are properly included and should be part of a stipulation of settlement settling a divorce.