Visitation When the Non-Custodial Parent Won't be Present

If a parent knows that the child's other parent won't be present during visitation, do they have to let the child go on the visit?

There will be times during a parent's time with a child when the child may spend time with other people. For example, it is perfectly appropriate for a parent to allow a child to spend time with grandparents during that parent's own parenting time, even if the parent won't be present for part or all of the visit.

Also, what does it mean to "know" what is going to happen? If the non-custodial parent later says that the custodial parent was wrong, how is the custodial parent going to prove that the non-custodial parent was not going to be present?

Absent an actual restriction in the custody order, it is best to avoid creating unnecessary conflict. If there is an actual reason to be concerned about the visitation, it makes sense to consult a custody lawyer before taking action.