Can a mother that is unmarried take her child out of the state of Missouri?

Answer 1

Under those circumstances, the mother is the only established parent, and for anyone else to take the children out of state without permission is legally chargable as kidnapping.

Witholding the children from the mother without a court order, will not only land that person in jail, but the children will be traumatized by all the drama in that situation. And a court order requires paternity and/or custody to be established.

Most jurisdictions tend to side with the mother in most cases, so taking that action is not going to set well with any judge hearing the case, regardless of any mitigating circumstances.

If the mother is a threat to the safety and welfare of the children, there must be sufficient evidence to involve child welfare services (Dept of Children and Families) and a case worker assigned to investigate. It is a long and arduous process, but the welfare of the children must come first.

If there is no threat to the children, and an unwed father takes the children without permission, especially if there is no paternity or child support being paid, taking the children will probably be view as a crime and can be prosecuted as a very serious felony in any court of law.

Answer 2

For a vacation, yes. If there's more it depends on the custody agreement. If you have none or if it says you can, no problem.