A communication protocol is the section of a parenting plan governing how parents communicate with each other about the child. It specifies the method, frequency, and scope of parent-to-parent communication and establishes boundaries that protect the child from exposure to adult conflict.

In cooperative co-parenting situations a basic communication protocol may simply specify the preferred communication method and response time expectations. In high-conflict situations the protocol may require use of a dedicated co-parenting communication platform and limit communication to child-related topics.

A well-drafted communication protocol reduces the opportunities for conflict at the contact points that most often produce it. The more specific the protocol the less room there is for dispute about what was expected.