Iowa Code § 232.88: Summons, notice, subpoenas, and service.

After a petition has been filed, the court shall issue and serve summons, subpoenas, and other process in the same manner as for adjudicatory hearings in cases of juvenile delinquency as provided in section 232.37. Reasonable notice shall be provided to the persons required to be provided notice under section 232.37, except that notice shall be waived regarding a person who was notified of the adjudicatory hearing and who failed to appear. In addition, reasonable notice for any hearing under this subchapter shall be provided to the agency, facility, institution, or person, including a foster parent, relative, or other individual providing preadoptive care, with whom a child has been placed.