A verbal agreement is a good start, but you should really get it on paper with the backing of signatures and a notary public.

A written parenting agreement is highly recommended, to the extent that certain states have made them mandatory in the state statutes. A parenting agreement should be rather comprehensive, because there are an enormous amount of issues to be addressed when it comes to the rearing of any child. A parenting agreement should always be in writing and each parent, if possible, should work together as a team in developing this agreement. No one knows your child better than you and the other parent, so it does not make much sense to have a lawyer create one for you. Your lawyer may provide you an example, but it is your job, as a divorcing and/or separating parent to make that agreement specialized for your child and your situation. The parenting agreement will help bring you and the other parent to the same playing field as well as secure the future and everyday life of your child. Between weekend or monthly visitation/parenting-time, it can be very difficult to manage any sort of routine or rituals if you and the other parent are not working from the same parenting plan.