When a judge has signed a parental plan then it has become a court order that both parents must abide by. If a parent is not complying with the plan, like a failure to pay child support or failure to comply by the visitation schedule, you can file a hearing for contempt through your lawyer. If the judge agrees with you at the contempt hearing, the parent who disobeyed can face fines and possibly jail time. Without having a judge approved parenting plan there is little to no action you would be able to take to correct the other parent’s behavior.