Minnesota law allows a parent, legal, guardian, teacher, or other caretaker of a child or student to use "reasonable force" to "restrain or correct the child."  That said, in the context of a pending divorce or child custody case, it is inadvisable to use any kind of corporal punishment at all. Many of the guardian ad litems, custody evaluators, psychologists, and others involved in the family court system have strong feelings against the use of any kind of corporal punishment or physical correction of a child at all; and a parent's use of corporal punishment might become a reason why one of these professionals makes custody, parenting time, or other recommendations that are contrary to your wishes. Also, the use of any physical force at all can be exaggerated by the other parent, who may do so in order to gain an advantage in a custody and parenting time contest, even to the point of bringing a petition for an order for protection against you on behalf of the child. It is far safer, therefore, to use alternative disciplinary techniques, such as time-outs, verbal reprimands, withholding of privileges, etc.