Ohio Rev. Code § 2743.13: Filing complaint or other pleading - summons.

(A) The complaint or other pleading asserted in the court of claims against the state shall name as defendant each state department, board, office, commission, agency, institution, or other instrumentality whose actions are alleged as the basis of complaint.

(B) Upon the filing of the complaint or other pleading requiring service of summons, the clerk of the court of claims shall issue summons to each defendant and the attorney general. Summonses shall be in the form prescribed by and issued pursuant to the Civil Rules. The claimant shall file the original of the complaint or other pleading with the clerk and shall provide the clerk with sufficient copies to serve one copy upon each named defendant and the attorney general.