Me. Rev. Stat. tit. 18-C, § 9-109

The court may refer the parties to mediation at any time after a petition is filed if mediation services are available at a reasonable fee or no cost, and may require that the parties have made a good faith effort to mediate the issue before holding a hearing. An agreement reached by the parties through mediation on an issue must be reduced to writing, signed by the parties and presented to the court for approval as a court order.