Ohio Loc. App. R. 2.11
Upon the filing of a notice of appeal in an action (1) involving a class of litigants represented by more than one attorney of record, (2) in which a party is represented by more than one attorney of record, or (3) in which parties having similar interests in the appeal are represented by more than one attorney of record, a designation of primary counsel for service of court documents shall be filed with the notice of appeal. The designation shall be signed by the designated primary counsel and all other attorneys representing any class member or party having interests in the appeal similar to those of the party or class represented by the designated primary counsel. All court orders, decisions, opinions, or papers served by the court or its clerk shall be served solely upon the designated primary counsel for the class, party, or parties. Primary counsel shall be responsible for notifying and serving in a timely manner all parties or attorneys of record having similar interests in the action with copies of the court's orders, decisions, opinions or other papers.
Ohio. Loc. App. R. 2.11